What is the Neurological-psychological by Donald hebb?

erikson argued that each stage of the psychosocial stages of lifespan development is characterized by a?

The idea of white supremacy and indeed the modern concept of race itself arose during the process of world conquest by Europeans. Carl von Linnaeus's four-fold classification of humans classifies Europeans as intelligent and severe, Americans as contented and free, Asians as ritualistic, and Africans as lazy and capricious. Race was also used to justify the construction of socially specific mental disorders such as drapetomania and dysaesthesia aethiopica—the behavior of uncooperative African slaves. After the creation of experimental psychology, "ethnical psychology" emerged as a subdiscipline, based on the assumption that studying primitive races would provide an important link between animal behavior and the psychology of more evolved humans. Psychologists take human behavior as a main area of study. Much of the research in this area began with tests on mammals, based on the idea that humans exhibit similar fundamental tendencies. Behavioral research ever aspires to improve the effectiveness of techniques for behavior modification. Early behavioral researchers studied stimulus–response pairings, now known as classical conditioning. They demonstrated that behaviors could be linked through repeated association with stimuli eliciting pain or pleasure. Ivan Pavlov—known best for inducing dogs to salivate in the presence of a stimulus previously linked with food—became a leading figure in the Soviet Union and inspired followers to use his methods on humans. In the United States, Edward Lee Thorndike initiated "connectionism" studies by trapping animals in "puzzle boxes" and rewarding them for escaping. Thorndike wrote in 1911: "There can be no moral warrant for studying man's nature unless the study will enable us to control his acts." From 1910–1913 the American Psychological Association went through a sea change of opinion, away from mentalism and towards "behavioralism", and in 1913 John B. Watson coined the term behaviorism for this school of thought. Watson's famous Little Albert experiment in 1920 demonstrated that repeated use of upsetting loud noises could instill phobias (aversions to other stimuli) in an infant human. Karl Lashley, a close collaborator with Watson, examined biological manifestations of learning in the brain.Embraced and extended by Clark L. Hull, Edwin Guthrie, and others, behaviorism became a widely used research paradigm. A new method of "instrumental" or "operant" conditioning added the concepts of reinforcement and punishment to the model of behavior change. Radical behaviorists avoided discussing the inner workings of the mind, especially the unconscious mind, which they considered impossible to assess scientifically. Operant conditioning was first described by Miller and Kanorski and popularized in the U.S. by B.F. Skinner, who emerged as a leading intellectual of the behaviorist movement.Noam Chomsky delivered an influential critique of radical behaviorism on the grounds that it could not adequately explain the complex mental process of language acquisition. Martin Seligman and colleagues discovered that the conditioning of dogs led to outcomes ("learned helplessness") that opposed the predictions of behaviorism. Skinner's behaviorism did not die, perhaps in part because it generated successful practical applications. Edward C. Tolman advanced a hybrid "cognitive behavioral" model, most notably with his 1948 publication discussing the cognitive maps used by rats to guess at the location of food at the end of a modified maze.The Association for Behavior Analysis International was founded in 1974 and by 2003 had members from 42 countries. The field has been especially influential in Latin America, where it has a regional organization known as ALAMOC: La Asociación Latinoamericana de Análisis y Modificación del Comportamiento. Behaviorism also gained a strong foothold in Japan, where it gave rise to the Japanese Society of Animal Psychology (1933), the Japanese Association of Special Education (1963), the Japanese Society of Biofeedback Research (1973), the Japanese Association for Behavior Therapy (1976), the Japanese Association for Behavior Analysis (1979), and the Japanese Association for Behavioral Science Research (1994). Today the field of behaviorism is also commonly referred to as behavior modification or behavior analysis. Cognitive psychology studies cognition, the mental processes underlying mental activity. Perception, attention, reasoning, thinking, problem solving, memory, learning, language, and emotion are areas of research. Classical cognitive psychology is associated with a school of thought known as cognitivism, whose adherents argue for an information processing model of mental function, informed by functionalism and experimental psychology. Starting in the 1950s, the experimental techniques developed by Wundt, James, Ebbinghaus, and others re-emerged as experimental psychology became increasingly cognitivist—concerned with information and its processing—and, eventually, constituted a part of the wider cognitive science. Some called this development the cognitive revolution because it rejected the anti-mentalist dogma of behaviorism as well as the strictures of psychoanalysis.Social learning theorists, such as Albert Bandura, argued that the child's environment could make contributions of its own to the behaviors of an observant subject. Technological advances also renewed interest in mental states and representations. English neuroscientist Charles Sherrington and Canadian psychologist Donald O. Hebb used experimental methods to link psychological phenomena with the structure and function of the brain. The rise of computer science, cybernetics and artificial intelligence suggested the value of comparatively studying information processing in humans and machines. Research in cognition had proven practical since World War II, when it aided in the understanding of weapons operation.A popular and representative topic in this area is cognitive bias, or irrational thought. Psychologists (and economists) have classified and described a sizeable catalogue of biases which recur frequently in human thought. The availability heuristic, for example, is the tendency to overestimate the importance of something which happens to come readily to mind.Elements of behaviorism and cognitive psychology were synthesized to form cognitive behavioral therapy, a form of psychotherapy modified from techniques developed by American psychologist Albert Ellis and American psychiatrist Aaron T. Beck. On a broader level, cognitive science is an interdisciplinary enterprise of cognitive psychologists, cognitive neuroscientists, researchers in artificial intelligence, linguists, human–computer interaction, computational neuroscience, logicians and social scientists. The discipline of cognitive science covers cognitive psychology as well as philosophy of mind, computer science, and neuroscience. Computer simulations are sometimes used to model phenomena of interest. Social psychology is the study of how humans think about each other and how they relate to each other. Social psychologists study such topics as the influence of others on an individual's behavior (e.g. conformity, persuasion), and the formation of beliefs, attitudes, and stereotypes about other people. Social cognition fuses elements of social and cognitive psychology in order to understand how people process, remember, or distort social information. The study of group dynamics reveals information about the nature and potential optimization of leadership, communication, and other phenomena that emerge at least at the microsocial level. In recent years, many social psychologists have become increasingly interested in implicit measures, mediational models, and the interaction of both person and social variables in accounting for behavior. The study of human society is therefore a potentially valuable source of information about the causes of psychiatric disorder. Some sociological concepts applied to psychiatric disorders are the social role, sick role, social class, life event, culture, migration, social, and total institution. Psychoanalysis comprises a method of investigating the mind and interpreting experience; a systematized set of theories about human behavior; and a form of psychotherapy to treat psychological or emotional distress, especially conflict originating in the unconscious mind. This school of thought originated in the 1890s with Austrian medical doctors including Josef Breuer (physician), Alfred Adler (physician), Otto Rank (psychoanalyst), and most prominently Sigmund Freud (neurologist). Freud's psychoanalytic theory was largely based on interpretive methods, introspection and clinical observations. It became very well known, largely because it tackled subjects such as sexuality, repression, and the unconscious. These subjects were largely taboo at the time, and Freud provided a catalyst for their open discussion in polite society. Clinically, Freud helped to pioneer the method of free association and a therapeutic interest in dream interpretation.Swiss psychiatrist Carl Jung, influenced by Freud, elaborated a theory of the collective unconscious—a primordial force present in all humans, featuring archetypes which exerted a profound influence on the mind. Jung's competing vision formed the basis for analytical psychology, which later led to the archetypal and process-oriented schools. Other well-known psychoanalytic scholars of the mid-20th century include Erik Erikson, Melanie Klein, D.W. Winnicott, Karen Horney, Erich Fromm, John Bowlby, and Sigmund Freud's daughter, Anna Freud. Throughout the 20th century, psychoanalysis evolved into diverse schools of thought which could be called Neo-Freudian. Among these schools are ego psychology, object relations, and interpersonal, Lacanian, and relational psychoanalysis.Psychologists such as Hans Eysenck and philosophers including Karl Popper criticized psychoanalysis. Popper argued that psychoanalysis had been misrepresented as a scientific discipline, whereas Eysenck said that psychoanalytic tenets had been contradicted by experimental data. By the end of 20th century, psychology departments in American universities mostly marginalized Freudian theory, dismissing it as a "desiccated and dead" historical artifact. However, researchers in the emerging field of neuro-psychoanalysis today defend some of Freud's ideas on scientific grounds, while scholars of the humanities maintain that Freud was not a "scientist at all, but ... an interpreter". Humanistic psychology developed in the 1950s as a movement within academic psychology, in reaction to both behaviorism and psychoanalysis. The humanistic approach sought to glimpse the whole person, not just fragmented parts of the personality or isolated cognitions. Humanism focused on uniquely human issues, such as free will, personal growth, self-actualization, self-identity, death, aloneness, freedom, and meaning. It emphasized subjective meaning, rejection of determinism, and concern for positive growth rather than pathology. Some founders of the humanistic school of thought were American psychologists Abraham Maslow, who formulated a hierarchy of human needs, and Carl Rogers, who created and developed client-centered therapy. Later, positive psychology opened up humanistic themes to scientific modes of exploration. The American Association for Humanistic Psychology, formed in 1963, declared: Humanistic psychology is primarily an orientation toward the whole of psychology rather than a distinct area or school. It stands for respect for the worth of persons, respect for differences of approach, open-mindedness as to acceptable methods, and interest in exploration of new aspects of human behavior. As a "third force" in contemporary psychology, it is concerned with topics having little place in existing theories and systems: e.g., love, creativity, self, growth, organism, basic need-gratification, self-actualization, higher values, being, becoming, spontaneity, play, humor, affection, naturalness, warmth, ego-transcendence, objectivity, autonomy, responsibility, meaning, fair-play, transcendental experience, peak experience, courage, and related concepts. In the 1950s and 1960s, influenced by philosophers Søren Kierkegaard and Martin Heidegger, psychoanalytically trained American psychologist Rollo May pioneered an existential branch of psychology, which included existential psychotherapy: a method based on the belief that inner conflict within a person is due to that individual's confrontation with the givens of existence. Swiss psychoanalyst Ludwig Binswanger and American psychologist George Kelly may also be said to belong to the existential school. Existential psychologists differed from more "humanistic" psychologists in their relatively neutral view of human nature and their relatively positive assessment of anxiety. Existential psychologists emphasized the humanistic themes of death, free will, and meaning, suggesting that meaning can be shaped by myths, or narrative patterns, and that it can be encouraged by an acceptance of the free will requisite to an authentic, albeit often anxious, regard for death and other future prospects. Austrian existential psychiatrist and Holocaust survivor Viktor Frankl drew evidence of meaning's therapeutic power from reflections garnered from his own internment. He created a variation of existential psychotherapy called logotherapy, a type of existentialist analysis that focuses on a will to meaning (in one's life), as opposed to Adler's Nietzschean doctrine of will to power or Freud's will to pleasure. Personality psychology is concerned with enduring patterns of behavior, thought, and emotion—commonly referred to as personality—in individuals. Theories of personality vary across different psychological schools and orientations. They carry different assumptions about such issues as the role of the unconscious and the importance of childhood experience. According to Freud, personality is based on the dynamic interactions of the id, ego, and super-ego. In order to develop a taxonomy of personality constructs, trait theorists, in contrast, attempt to describe the personality sphere in terms of a discrete number of key traits using the statistical data-reduction method of factor analysis. Although the number of proposed traits has varied widely, an early biologically-based model proposed by Hans Eysenck, the 3rd mostly highly cited psychologist of the 20th Century (after Freud, and Piaget respectively), suggested that at least three major trait constructs are necessary to describe human personality structure: extraversion–introversion, neuroticism-stability, and psychoticism-normality. Raymond Cattell, the 7th most highly cited psychologist of the 20th Century (based on the scientific peer-reviewed journal literature) empirically derived a theory of 16 personality factors at the primary-factor level, and up to 8 broader second-stratum factors (at the Eysenckian level of analysis), rather than the "Big Five" dimensions. Dimensional models of personality are receiving increasing support, and a version of dimensional assessment has been included in the DSM-V. However, despite a plethora of research into the various versions of the "Big Five" personality dimensions, it appears necessary to move on from static conceptualizations of personality structure to a more dynamic orientation, whereby it is acknowledged that personality constructs are subject to learning and change across the lifespan.An early example of personality assessment was the Woodworth Personal Data Sheet, constructed during World War I. The popular, although psychometrically inadequate Myers–Briggs Type Indicator sought to assess individuals' "personality types" according to the personality theories of Carl Jung. Behaviorist resistance to introspection led to the development of the Strong Vocational Interest Blank and Minnesota Multiphasic Personality Inventory (MMPI), in an attempt to ask empirical questions that focused less on the psychodynamics of the respondent. However, the MMPI has been subjected to critical scrutiny, given that it adhered to archaic psychiatric nosology, and since it required individuals to provide subjective, introspective responses to the hundreds of items pertaining to psychopathology. Study of the unconscious mind, a part of the psyche outside the awareness of the individual which nevertheless influenced thoughts and behavior was a hallmark of early psychology. In one of the first psychology experiments conducted in the United States, C.S. Peirce and Joseph Jastrow found in 1884 that subjects could choose the minutely heavier of two weights even if consciously uncertain of the difference. Freud popularized this concept, with terms like Freudian slip entering popular culture, to mean an uncensored intrusion of unconscious thought into one's speech and action. His 1901 text The Psychopathology of Everyday Life catalogues hundreds of everyday events which Freud explains in terms of unconscious influence. Pierre Janet advanced the idea of a subconscious mind, which could contain autonomous mental elements unavailable to the scrutiny of the subject.Behaviorism notwithstanding, the unconscious mind has maintained its importance in psychology. Cognitive psychologists have used a "filter" model of attention, according to which much information processing takes place below the threshold of consciousness, and only certain processes, limited by nature and by simultaneous quantity, make their way through the filter. Copious research has shown that subconscious priming of certain ideas can covertly influence thoughts and behavior. A significant hurdle in this research is proving that a subject's conscious mind has not grasped a certain stimulus, due to the unreliability of self-reporting. For this reason, some psychologists prefer to distinguish between implicit and explicit memory. In another approach, one can also describe a subliminal stimulus as meeting an objective but not a subjective threshold.The automaticity model, which became widespread following exposition by John Bargh and others in the 1980s, describes sophisticated processes for executing goals which can be selected and performed over an extended duration without conscious awareness. Some experimental data suggests that the brain begins to consider taking actions before the mind becomes aware of them. This influence of unconscious forces on people's choices naturally bears on philosophical questions free will. John Bargh, Daniel Wegner, and Ellen Langer are some prominent contemporary psychologists who describe free will as an illusion. Psychologists such as William James initially used the term motivation to refer to intention, in a sense similar to the concept of will in European philosophy. With the steady rise of Darwinian and Freudian thinking, instinct also came to be seen as a primary source of motivation. According to drive theory, the forces of instinct combine into a single source of energy which exerts a constant influence. Psychoanalysis, like biology, regarded these forces as physical demands made by the organism on the nervous system. However, they believed that these forces, especially the sexual instincts, could become entangled and transmuted within the psyche. Classical psychoanalysis conceives of a struggle between the pleasure principle and the reality principle, roughly corresponding to id and ego. Later, in Beyond the Pleasure Principle, Freud introduced the concept of the death drive, a compulsion towards aggression, destruction, and psychic repetition of traumatic events. Meanwhile, behaviorist researchers used simple dichotomous models (pleasure/pain, reward/punishment) and well-established principles such as the idea that a thirsty creature will take pleasure in drinking. Clark Hull formalized the latter idea with his drive reduction model.Hunger, thirst, fear, sexual desire, and thermoregulation all seem to constitute fundamental motivations for animals. Humans also seem to exhibit a more complex set of motivations—though theoretically these could be explained as resulting from primordial instincts—including desires for belonging, self-image, self-consistency, truth, love, and control.Motivation can be modulated or manipulated in many different ways. Researchers have found that eating, for example, depends not only on the organism's fundamental need for homeostasis—an important factor causing the experience of hunger—but also on circadian rhythms, food availability, food palatability, and cost. Abstract motivations are also malleable, as evidenced by such phenomena as goal contagion: the adoption of goals, sometimes unconsciously, based on inferences about the goals of others. Vohs and Baumeister suggest that contrary to the need-desire-fulfilment cycle of animal instincts, human motivations sometimes obey a "getting begets wanting" rule: the more you get a reward such as self-esteem, love, drugs, or money, the more you want it. They suggest that this principle can even apply to food, drink, sex, and sleep. Mainly focusing on the development of the human mind through the life span, developmental psychology seeks to understand how people come to perceive, understand, and act within the world and how these processes change as they age. This may focus on cognitive, affective, moral, social, or neural development. Researchers who study children use a number of unique research methods to make observations in natural settings or to engage them in experimental tasks. Such tasks often resemble specially designed games and activities that are both enjoyable for the child and scientifically useful, and researchers have even devised clever methods to study the mental processes of infants. In addition to studying children, developmental psychologists also study aging and processes throughout the life span, especially at other times of rapid change (such as adolescence and old age). Developmental psychologists draw on the full range of psychological theories to inform their research. All researched psychological traits are influenced by both genes and environment, to varying degrees. These two sources of influence are often confounded in observational research of individuals or families. An example is the transmission of depression from a depressed mother to her offspring. Theory may hold that the offspring, by virtue of having a depressed mother in his or her (the offspring's) environment, is at risk for developing depression. However, risk for depression is also influenced to some extent by genes. The mother may both carry genes that contribute to her depression but will also have passed those genes on to her offspring thus increasing the offspring's risk for depression. Genes and environment in this simple transmission model are completely confounded. Experimental and quasi-experimental behavioral genetic research uses genetic methodologies to disentangle this confound and understand the nature and origins of individual differences in behavior. Traditionally this research has been conducted using twin studies and adoption studies, two designs where genetic and environmental influences can be partially un-confounded. More recently, the availability of microarray molecular genetic or genome sequencing technologies allows researchers to measure participant DNA variation directly, and test whether individual genetic variants within genes are associated with psychological traits and psychopathology through methods including genome-wide association studies. One goal of such research is similar to that in positional cloning and its success in Huntington's: once a causal gene is discovered biological research can be conducted to understand how that gene influences the phenotype. One major result of genetic association studies is the general finding that psychological traits and psychopathology, as well as complex medical diseases, are highly polygenic, where a large number (on the order of hundreds to thousands) of genetic variants, each of small effect, contribute to individual differences in the behavioral trait or propensity to the disorder. Active research continues to understand the genetic and environmental bases of behavior and their interaction. Psychology encompasses many subfields and includes different approaches to the study of mental processes and behavior: Psychological testing has ancient origins, such as examinations for the Chinese civil service dating back to 2200 BC. Written exams began during the Han dynasty (202 BC – AD 200). By 1370, the Chinese system required a stratified series of tests, involving essay writing and knowledge of diverse topics. The system was ended in 1906. In Europe, mental assessment took a more physiological approach, with theories of physiognomy—judgment of character based on the face—described by Aristotle in 4th century BC Greece. Physiognomy remained current through the Enlightenment, and added the doctrine of phrenology: a study of mind and intelligence based on simple assessment of neuroanatomy.When experimental psychology came to Britain, Francis Galton was a leading practitioner, and, with his procedures for measuring reaction time and sensation, is considered an inventor of modern mental testing (also known as psychometrics). James McKeen Cattell, a student of Wundt and Galton, brought the concept to the United States, and in fact coined the term "mental test". In 1901, Cattell's student Clark Wissler published discouraging results, suggesting that mental testing of Columbia and Barnard students failed to predict their academic performance. In response to 1904 orders from the Minister of Public Instruction, French psychologists Alfred Binet and Théodore Simon elaborated a new test of intelligence in 1905–1911, using a range of questions diverse in their nature and difficulty. Binet and Simon introduced the concept of mental age and referred to the lowest scorers on their test as idiots. Henry H. Goddard put the Binet-Simon scale to work and introduced classifications of mental level such as imbecile and feebleminded. In 1916 (after Binet's death), Stanford professor Lewis M. Terman modified the Binet-Simon scale (renamed the Stanford–Binet scale) and introduced the intelligence quotient as a score report. From this test, Terman concluded that mental retardation "represents the level of intelligence which is very, very common among Spanish-Indians and Mexican families of the Southwest and also among negroes. Their dullness seems to be racial."Following the Army Alpha and Army Beta tests for soldiers in World War I, mental testing became popular in the US, where it was soon applied to school children. The federally created National Intelligence Test was administered to 7 million children in the 1920s, and in 1926 the College Entrance Examination Board created the Scholastic Aptitude Test to standardize college admissions. The results of intelligence tests were used to argue for segregated schools and economic functions—i.e. the preferential training of Black Americans for manual labor. These practices were criticized by black intellectuals such a Horace Mann Bond and Allison Davis. Eugenicists used mental testing to justify and organize compulsory sterilization of individuals classified as mentally retarded. In the United States, tens of thousands of men and women were sterilized. Setting a precedent which has never been overturned, the U.S. Supreme Court affirmed the constitutionality of this practice in the 1907 case Buck v. Bell.Today mental testing is a routine phenomenon for people of all ages in Western societies. Modern testing aspires to criteria including standardization of procedure, consistency of results, output of an interpretable score, statistical norms describing population outcomes, and, ideally, effective prediction of behavior and life outcomes outside of testing situations. The provision of psychological health services is generally called clinical psychology in the U.S. The definitions of this term are various and may include school psychology and counseling psychology. Practitioners typically includes people who have graduated from doctoral programs in clinical psychology but may also include others. In Canada, the above groups usually fall within the larger category of professional psychology. In Canada and the US, practitioners get bachelor's degrees and doctorates, then spend one year in an internship and one year in postdoctoral education. In Mexico and most other Latin American and European countries, psychologists do not get bachelor's and doctorate degrees; instead, they take a three-year professional course following high school. Clinical psychology is at present the largest specialization within psychology. It includes the study and application of psychology for the purpose of understanding, preventing, and relieving psychologically based distress, dysfunction or mental illness and to promote subjective well-being and personal development. Central to its practice are psychological assessment and psychotherapy although clinical psychologists may also engage in research, teaching, consultation, forensic testimony, and program development and administration.Credit for the first psychology clinic in the United States typically goes to Lightner Witmer, who established his practice in Philadelphia in 1896. Another modern psychotherapist was Morton Prince. For the most part, in the first part of the twentieth century, most mental health care in the United States was performed by specialized medical doctors called psychiatrists. Psychology entered the field with its refinements of mental testing, which promised to improve diagnosis of mental problems. For their part, some psychiatrists became interested in using psychoanalysis and other forms of psychodynamic psychotherapy to understand and treat the mentally ill. In this type of treatment, a specially trained therapist develops a close relationship with the patient, who discusses wishes, dreams, social relationships, and other aspects of mental life. The therapist seeks to uncover repressed material and to understand why the patient creates defenses against certain thoughts and feelings. An important aspect of the therapeutic relationship is transference, in which deep unconscious feelings in a patient reorient themselves and become manifest in relation to the therapist.Psychiatric psychotherapy blurred the distinction between psychiatry and psychology, and this trend continued with the rise of community mental health facilities and behavioral therapy, a thoroughly non-psychodynamic model which used behaviorist learning theory to change the actions of patients. A key aspect of behavior therapy is empirical evaluation of the treatment's effectiveness. In the 1970s, cognitive-behavior therapy arose, using similar methods and now including the cognitive constructs which had gained popularity in theoretical psychology. A key practice in behavioral and cognitive-behavioral therapy is exposing patients to things they fear, based on the premise that their responses (fear, panic, anxiety) can be deconditioned.Mental health care today involves psychologists and social workers in increasing numbers. In 1977, National Institute of Mental Health director Bertram Brown described this shift as a source of "intense competition and role confusion". Graduate programs issuing doctorates in psychology (PhD or PsyD) emerged in the 1950s and underwent rapid increase through the 1980s. This degree is intended to train practitioners who might conduct scientific research.Some clinical psychologists may focus on the clinical management of patients with brain injury—this area is known as clinical neuropsychology. In many countries, clinical psychology is a regulated mental health profession. The emerging field of disaster psychology (see crisis intervention) involves professionals who respond to large-scale traumatic events.The work performed by clinical psychologists tends to be influenced by various therapeutic approaches, all of which involve a formal relationship between professional and client (usually an individual, couple, family, or small group). Typically, these approaches encourage new ways of thinking, feeling, or behaving. Four major theoretical perspectives are psychodynamic, cognitive behavioral, existential–humanistic, and systems or family therapy. There has been a growing movement to integrate the various therapeutic approaches, especially with an increased understanding of issues regarding culture, gender, spirituality, and sexual orientation. With the advent of more robust research findings regarding psychotherapy, there is evidence that most of the major therapies have equal effectiveness, with the key common element being a strong therapeutic alliance

Explain the historical development of psychology as a science?

Philosophical interest in the general set of phenomena currently organized in the West under the label "psychology" dates back to the ancient civilizations of Egypt, Greece, China and India. These earlier forms of inquiry began adopting what would now be recognized as a more clinical[1] and experimental[2] approach under medieval Muslim psychologists and physicians, whose practitioners built what we would today recognize as psychiatric hospitals.[3] Psychology as a self-conscious field of experimental study is commonly said to have begun in 1879, when Wilhelm Wundt founded the first laboratory dedicated exclusively to psychological research in Leipzig. Other important early contributors to the field include Hermann Ebbinghaus (a pioneer in the study of memory), William James (the American father of pragmatism), and Ivan Pavlov (who developed the procedures associated with classical conditioning). Soon after the development of experimental psychology, various kinds of applied psychology appeared. G. Stanley Hall brought scientific pedagogy to the United States from Germany in the early 1880s. John Dewey's educational theory of the 1890s was another example. Also in the 1890s, Hugo Münsterberg began writing about the application of psychology to industry, law, and other fields. Lightner Witmer established the first psychological clinic in the 1890s. James McKeen Cattell adapted Francis Galton's anthropometric methods to generate the first program of mental testing in the 1890s. In Vienna, meanwhile, the psychiatrist Sigmund Freud developed an independent approach to the study of the mind called psychoanalysis, which has been widely influential. The 20th century saw a reaction towards Edward Titchener's critique of Wundt's empiricism. This contributed to the formulation of behaviorism by John B. Watson, which was popularized by B. F. Skinner. Behaviorism proposed limiting psychological study to that of overt behavior, because that could be quantified and easily measured. Behaviorists considered knowledge of the "mind" too metaphysical to achieve scientifically. The final decades of the 20th century saw the decline of behaviorism and the rise of an interdisciplinary approach to studying the human mind, known collectively as cognitive science. Cognitive science again considers the "mind" as a subject for investigation, using the tools of evolutionary psychology, linguistics, computer science, philosophy, and neurobiology. This form of investigation has proposed that a wide understanding of the human mind is possible, and that such an understanding may be applied to other research domains, such as artificial intelligence.Many cultures throughout history have speculated on the nature of the mind, soul, spirit, etc. For instance, in Ancient Egypt, the Edwin Smith Papyrus contains an early description of the brain, and some speculations on its functions (though in a medical/surgical context). Though other medical documents of ancient times were full of incantations and applications meant to turn away disease-causing demons and other superstition, the Edwin Smith Papyrus gives remedies to almost 50 conditions and only 1 contains incantations to ward off evil. It has been praised as being similar to what is today considered common knowledge, but must be recognized as having originated in a very different context. Ancient Greek philosophers, from Thales (fl. 550 bc) through even to the Roman period, developed an elaborate theory of what they termed the psuchẽ(from which the first half of "psychology" is derived), as well as other "psychological" terms - nous, thumos, logistikon, etc. (see e.g., Everson, 1991; Green & Groff, 2003). The most influential of these are the accounts of Plato (especially in the Republic - see, e.g., Robinson, 1995), Pythagoras and of Aristotle (esp. Peri Psyches, better known under its Latin title, De Anima - see, e.g., Durrant, 1993; Nussbaum & Rorty, 1992). Hellenistic philosophers (viz., the Stoics and Epicurians) diverged from the Classical Greek tradition in several important ways, especially in their concern with questions of the physiological basis of the mind (see e.g., Annas, 1992). The Roman physician Galen addressed these issues most elaborately and influentially of all. The Greek tradition influenced some Christian and Islamic thought on the topic. In the Judeo-Christian tradition, the Manual of Discipline (from the Dead Sea Scrolls, ca. 21 BC-61 AD) notes the division of human nature into two temperaments. In Asia, China had a long history of administering tests of ability as part of its education system. In the 6th century AD, Lin Xie carried out an early experiment, in which he asked people to draw a square with one hand and at the same time draw a circle with the other (ostensibly to test people's vulnerability to distraction). India, too, had an elaborate theory of "the self" in its Vedanta philosophical writings (see e.g., Paranjpe, 1998).The first institutions recognizable as insane asylums were built in the medieval Islamic world in the 8th century: in Baghdad in 705, Fes in the early 8th century, Cairo in 800, and Damascus and Aleppo in 1270.[4] Medieval Muslim physicians also developed practices to treat patients suffering from a variety of "diseases of the mind".[5] Ahmed ibn Sahl al-Balkhi (850-934) was among the first, in this tradition, to discuss disorders related to both the body and the mind, arguing that "if the nafs [psyche] gets sick, the body may also find no joy in life and may eventually develop a physical illness."[6] Al-Balkhi recognized that the body and the soul can be healthy or sick, or "balanced or imbalanced." He wrote that imbalance of the body can result in fever, headaches and other bodily illnesses, while imbalance of the soul can result in anger, anxiety, sadness and other nafs-related symptoms. He recognized two types of what we now call depression: one caused by known reasons such as loss or failure, which can be treated psychologically; and the other caused by unknown reasons possibly caused by physiological reasons, which can be treated through physical medicine.[6] In the 1010s, the Iraqi Arab scientist, Ibn al-Haytham (Alhazen) began to carry out experiments in areas related to body and the nafs. In his Book of Optics, for example, he examined visual perception and what we now call sensation, including variations in sensitivity, sensation of touch, perception of colors, perception of darkness, the psychological explanation of the moon illusion, and binocular vision.[2][7] Al-Biruni also employed such experimental methods in examining reaction time.[8] Avicenna, similarly, did early work in the treatment of nafs-related illnesses, and developed a system for associating changes in the pulse rate with inner feelings. Avicenna also described phenomena we now recognize as neuropsychiatric conditions, including hallucination, insomnia, mania, nightmare, melancholia, dementia, epilepsy, paralysis, stroke, vertigo and tremor.[9] Other medieval thinkers who discussed issues related to psychology included: * Ibn Sirin, who wrote a book on dreams and dream interpretation;[10] * Al-Kindi (Alkindus), who developed forms of music therapy;[11] * Ali ibn Sahl Rabban al-Tabari, who developed al-'ilaj al-nafs(sometimes translated as "psychotherapy"),[12] * Al-Farabi (Alpharabius), who discussed subjects related to social psychology and consciousness studies;[13] * Ali ibn Abbas al-Majusi (Haly Abbas), described neuroanatomy and neurophysiology;[13] * Abu al-Qasim al-Zahrawi (Abulcasis), described neurosurgery;[14] * Abū Rayhān al-Bīrūnī, who described reaction time;[15] * Ibn Tufail, who anticipated the tabula rasa argument and nature versus nurture debate.[16] Ibn Zuhr (Avenzoar) described disorders similar to meningitis, intracranial thrombophlebitis, and mediastinal germ cell tumors; Averroes attributed photoreceptor properties to the retina; and Maimonides described rabies and belladonna intoxication.[17] Witelo is considered a precursor of perception psychology. His Perspectiva contains much material in psychology, outlining views that are close to modern notions on the association of ideas and on the subconscious.Many of the Ancients' writings would have been lost had it not been for the efforts of the Arab and Islamic translators in the House of Wisdom, the House of Knowledge, and other such institutions, whose glosses and commentaries were later translated into Latin in the 12th century. However, it is not clear how these sources first came to be used during the Renaissance, and their influence on what would later emerge as the discipline of psychology is a topic of scholarly debate. [18] The first use of the term "psychology" is often attributed to the German scholastic philosopher Rudolf Göckel (1547-1628, often known under the Latin form Rudolph Goclenius), who published the Yucologia hoc est de hominis perfectione, anima, ortu in Marburg in 1590. However, the term seems to have been used more than six decades earlier by the Croatian humanist Marko Marulić (1450-1524) in the title of his Latin treatise, Psichiologia de ratione animae humanae.Although the treatise itself has not been preserved, its title appears in a list of Marulic's works compiled by his younger contemporary, Franjo Bozicevic-Natalis in his "Vita Marci Maruli Spalatensis" (Krstić, 1964). This, of course, may well not have been the very first usage, but it is the earliest documented use at present. The term did not come into popular usage until the German idealist philosopher, Christian Wolff (1679-1754) used it in his Psychologia empirica and Psychologia rationalis (1732-1734). This distinction between empirical and rational psychology was picked up in Denis Diderot's (1713-1780) Encyclopédie(1751-1784) and was popularized in France by Maine de Biran (1766-1824). In England, the term "psychology" overtook "mental philosophy" in the middle of the 19th century, especially in the work of William Hamilton (1788-1856) (see Danziger, 1997, chap. 3). Early psychology was regarded as the study of the soul (in the Christian sense of the term).[citation needed] The modern philosophical form of psychology was heavily influenced by the works of René Descartes (1596-1650), and the debates that he generated, of which the most relevant were the objections to his Meditations on First Philosophy (1641), published with the text. Also important to the later development of psychology were his Passions of the Soul (1649) and Treatise on Man(completed in 1632 but, along with the rest of The World, withheld from publication after Descartes heard of the Catholic Church's condemnation of Galileo; it was eventually published posthumously, in 1664). Although not educated as a doctor, Descartes did extensive anatomical studies of bulls' hearts and was considered important enough for Harvey to respond to. Descartes was one of the first to endorse Harvey's model of the circulation of the blood, but disagreed with his metaphysical framework to explain it. Descartes dissected animals and human cadavers and as a result was familiar with the research on the flow of blood leading to the conclusion that the body is a complex device that is capable of moving without the soul, thus contradicting the "Doctrine of the Soul". The emergence of psychology as a medical discipline was given a major boost by Thomas Willis, not only in his reference to psychology (the "Doctrine of the Soul") in terms of brain function, but through his detailed 1672 anatomical work, and his treatise "De Anima Brutorum" ("Two Discourses on the Souls of Brutes"). However, Willis acknowledged the influence of Descartes's rival, Pierre Gassendi, as an inspiration for his work. The philosophers of the British Empiricist and Associationist schools had a profound impact on the later course of experimental psychology. John Locke's An Essay Concerning Human Understanding (1689), George Berkeley's Treatise Concerning the Principles of Human Knowledge(1710), and David Hume's A Treatise of Human Nature(1739-1740) were particularly influential, as were David Hartley's Observations on Man (1749) and John Stuart Mill's A System of Logic. (1843). Also notable was the work of some Continental Rationalist philosophers, especially Baruch Spinoza's (1632-1677) On the Improvement of the Understanding (1662) and Gottfried Wilhelm Leibniz's (1646-1716) New Essays on Human Understanding (completed 1705, published 1765). Also influential on the emerging discipline of psychology were debates surrounding the efficacy of Mesmerism (hypnosis) and the value of phrenology. The former was developed in the 1770s by Austrian physician Anton Mesmer (1734-1815) who claimed to use the power of gravity, and later of "animal magnetism," to cure various physical and mental ills. As Mesmer and his treatment became increasingly fashionable in both Vienna and Paris, it also began to come under the scrutiny of suspicious officials. In 1784, an investigation was commissioned in Paris by King Louis which included American ambassador Benjamin Franklin, chemist Antoine Lavoisier and physician Joseph-Ignace Guillotin (later the popularizer of the guillotine). They concluded that Mesmer's method was useless.Abbé Faria, an Indo-Portuguese priest, revived public attention to animal magnetism. Unlike Mesmer, Faria claimed that it 'generated from within the mind' by the power of expectancy and cooperation of the patient. Although disputed, the "magnetic" tradition continued among Mesmer's students and others, resurfacing in England in the 19th century in the work of physicians John Elliotson (1791-1868), James Esdaile (1808-1859), and James Braid (1795-1860), who renamed it "hypnotism." Mesmerism also continued to have a strong social (if not medical) following in England through the 19th century (see Winter, 1998).Faria's approach was significantly extended by the clinical and theoretical work of Ambroise-Auguste Liébeault and Hippolyte Bernheim of the Nancy School. Faria's theoretical position, and the subsequent experiences of those in the Nancy School made significant contributions to the later autosuggestion techniques of Émile Coué. It was adopted for the treatment of hysteria by the director of Paris's Salpêtrière Hospital, Jean-Martin Charcot (1825-1893). Phrenology began as "organology", a theory of brain structure developed by the German physician, Franz Joseph Gall (1758-1828). Gall argued that the brain is divided into a large number of functional "organs," each responsible for particular human mental abilities and dispositions - hope, love, spirituality, greed, language, the abilities to detect the size, form, and color of objects, etc. He argued that the larger each of these organs are, the greater the power of the corresponding mental trait. Further, he argued that one could detect the sizes of the organs in a given individual by feeling the surface of that person's skull. Gall's ultra-localizationist position with respect to the brain was soon attacked, most notably by French anatomist Pierre Flourens (1794-1867), who conducted ablation studies (on chickens) which purported to demonstrate little or no cerebral localization of function. Although Gall had been a serious (if misguided) researcher, his theory was taken by his assistant, Johann Gaspar Spurzheim (1776-1832), and developed into the profitable, popular enterprise of phrenology, which soon spawned, especially in Britain, a thriving industry of independent practitioners. In the hands of Scottish religious leader George Combe (1788-1858) (whose book The Constitution of Man was one of the best-sellers of the century), phrenology became strongly associated with political reform movements and egalitarian principles (see, e.g., Shapin, 1975; but also see van Wyhe, 2004). Phrenology soon spread to America as well, where itinerant practical phrenologists assessed the mental well-being of willing customers (see Sokal, 2001). Until the middle of the 19th century, psychology was widely regarded as a branch of philosophy. For instance, Immanuel Kant (1724-1804) declared in his Metaphysical Foundations of Natural Science (1786) that a scientific psychology "properly speaking" is impossible. However, Kant proposed what looks to modern eyes very much like an empirical psychology in his Anthropology from a Pragmatic Point of View (1798). Johann Friedrich Herbart (1776-1841) took issue with Kant's conclusion and attempted to develop a mathematical basis for a scientific psychology. Although he was unable to render his theory empirically testable, his efforts did lead scientists such as Ernst Heinrich Weber (1795-1878) and Gustav Theodor Fechner (1801-1887) to attempt to measure the mathematical relationships between the physical magnitudes of external stimuli and the psychological intensities of the resulting sensations. Fechner (1860) is the originator of the term psychophysics. Meanwhile, individual differences in reaction time had become a critical issue in the field of astronomy, under the name of the "personal equation". Early researches by Friedrich Wilhelm Bessel (1784-1846) in Königsberg and Adolf Hirsch led to the development of a highly precise chronoscope by Mathias Hipp that, in turn, was based on a design by Charles Wheatstone for a device that measured the speed of artillery shells (Edgell & Symes, 1906). Other timing instruments were borrowed from physiology (e.g., the kymograph) and adapted for use by the Utrecht ophthamologist Franciscus Donders (1818-1899) and his student Johan Jacob de Jaager in measuring the duration of simple mental decisions. The 19th century was also the period in which physiology, including neurophysiology, professionalized and saw some of its most significant discoveries. Among its leaders were Charles Bell (1774-1843) and François Magendie (1783-1855) who independently discovered the distinction between sensory and motor nerves in the spinal column, Johannes Müller (1801-1855) who proposed the doctrine of specific nerve energies, Emil du Bois-Reymond (1818-1896) who studied the electrical basis of muscle contraction, Pierre Paul Broca (1824-1880) and Carl Wernicke (1848-1905) who identified areas of the brain responsible for different aspects of language, as well as Gustav Fritsch (1837-1927), Eduard Hitzig (1839-1907), and David Ferrier (1843-1924) who localized sensory and motor areas of the brain. One of the principal founders of experimental physiology, Hermann von Helmholtz (1821-1894), conducted studies of a wide range of topics that would later be of interest to psychologists - the speed of neural transmission, the natures of sound and color, and of our perceptions of them, etc. In the 1860s, while he held a position in Heidelberg, Helmholtz engaged as an assistant a young M.D. named Wilhelm Wundt. Wundt employed the equipment of the physiology laboratory - chronoscope, kymograph, and various peripheral devices - to address more complicated psychological questions than had until then been considered experimentally. In particular he was interested in the nature of apperception - the point at which a perception comes into the central focus of conscious awareness. In 1874 Wundt took up a professorship in Zurich, where he published his landmark textbook, Grundzüge der physiologischen Psychologie (Principles of Physiological Psychology, 1874). Moving to a more prestigious professorship in Leipzig in 1875, Wundt founded a laboratory specifically dedicated to original research in experimental psychology in 1879, the first laboratory of its kind in the world. In 1883, he launched a journal in which to publish the results of his, and his students', research, Philosophische Studien(Philosophical Studies) (For more on Wundt, see, e.g., Bringmann & Tweney, 1980; Rieber & Robinson, 2001). Wundt attracted a large number of students not only from Germany, but also from abroad. Among his most influential American students were G. Stanley Hall (who had already obtained a PhD from Harvard under the supervision of William James), James McKeen Cattell (who was Wundt's first assistant), and Frank Angell. The most influential British student was Edward Bradford Titchener (who later became professor at Cornell). Experimental psychology laboratories were soon also established at Berlin by Carl Stumpf (1848-1936) and at Göttingen by Georg Elias Müller (1850-1934). Another major German experimental psychologist of the era, though he did not direct his own research institute, was Hermann Ebbinghaus (1850-1909). Experimentation was not the only approach to psychology in the German-speaking world at this time. Starting in the 1890s, employing the case study technique, the Viennese physician Sigmund Freud developed and applied the methods of hypnosis, free association, and dream interpretation to reveal putatively unconscious beliefs and desires that he argued were the underlying causes of his patients' "hysteria." He dubbed this approach psychoanalysis. Freudian psychoanalysis is particularly notable for the emphasis it places on the course of an individual's sexual development in pathogenesis. Psychoanalytic concepts have had a strong and lasting influence on Western culture, particularly on the arts. Although its scientific contribution is still a matter of debate, both Freudian and Jungian psychology revealed the existence of compartmentalized thinking, in which some behavior and thoughts are hidden from consciousness - yet operative as part of the complete personality. Hidden agendas, a bad conscience, or a sense of guilt, are examples of the existence of mental processes in which the individual is not conscious, through choice or lack of understanding, of some aspects of their personality and subsequent behavior. Psychoanalysis examines mental processes which affect the ego. An understanding of these theoretically allows the individual greater choice and consciousness with a healing effect in neurosis and occasionally in psychosis, both of which Richard von Krafft-Ebing defined as "diseases of the personality". Carl G. Jung was an associate of Freud's who later broke with him over Freud's emphasis on sexuality. Working with concepts of the unconscious first noted during the 1800s (by John Stuart Mill, Krafft-Ebing, Pierre Janet, Théodore Flournoy and others), Jung defined four mental functions which relate to and define the ego, the conscious self. Sensation (which tell consciousness that something is there), feelings (which consist of value judgments, and motivate our reaction to what we have sensed), intellect (an analytic function that compares this event to all known events and gives it a class and category, allowing us to understand a situation within a historical process, personal or public), and intuition (a mental function with access to deep behavioral patterns, intuition can suggest unexpected solutions or predict unforeseen consequences, "as if seeing around corners" as Jung put it). Jung insisted on an empirical psychology in which theories must be based on facts and not on the psychologist's projections or expectations. Around 1875, the Harvard physiology instructor (as he then was), William James, opened a small experimental psychology demonstration laboratory for use with his courses. The laboratory was never used, in those days, for original research, and so controversy remains as to whether it is to be regarded as the "first" experimental psychology laboratory or not. In 1878, James gave a series of lectures at Johns Hopkins University entitled "The Senses and the Brain and their Relation to Thought" in which he argued, contra Thomas Henry Huxley, that consciousness is not epiphenomenal, but must have an evolutionary function, or it would not have been naturally selected in humans. The same year James was contracted by Henry Holt to write a textbook on the "new" experimental psychology. If he had written it quickly, it would have been the first English-language textbook on the topic. It was twelve years, however, before his two-volume Principles of Psychology would be published. In the meantime textbooks were published by George Trumbull Ladd of Yale (1887) and James Mark Baldwin then of Lake Forest College (1889). In 1879 Charles Sanders Peirce was hired as a philosophy instructor at Johns Hopkins University. Although better known for his astronomical and philosophical work, Peirce also conducted what are perhaps the first American psychology experiments, on the subject of color vision, published in 1877 in the American Journal of Science (see Cadwallder, 1974). Peirce and his student Joseph Jastrow published "On Small Differences in Sensation" in the Memoirs of the National Academy of Sciences, in 1884. In 1882, Peirce was joined at Johns Hopkins by G. Stanley Hall, who opened the first American research laboratory devoted to experimental psychology in 1883. Peirce was forced out of his position by scandal and Hall was awarded the only professorship in philosophy at Johns Hopkins. In 1887 Hall founded the American Journal of Psychology, which published work primarily emanating from his own laboratory. In 1888 Hall left his Johns Hopkins professorship for the presidency of the newly-founded Clark University, where he remained for the rest of his career. Soon, experimental psychology laboratories were opened at the University of Pennsylvania (in 1887, by James McKeen Cattell), Indiana University (1888, William Lowe Bryan), the University of Wisconsin-Madison (1888, Joseph Jastrow), Clark University (1889, Edmund Clark Sanford), the McLean Asylum (1889, William Noyes), and the University of Nebraska (1889, Harry Kirke Wolfe). However, it was Princeton University's Eno Hall, built in 1924, that became the first university building in the United States to be devoted entirely to experimental psychology when it became the home of the university's Department of Psychology.[19] In 1890, William James' Principles of Psychology finally appeared, and rapidly became the most influential textbook in the history of American psychology. It laid many of the foundations for the sorts of questions that American psychologists would focus on for years to come. The book's chapters on consciousness, emotion, and habit were particularly agenda-setting. One of those who felt the impact of James' Principles was John Dewey, then professor of philosophy at the University of Michigan. With his junior colleagues, James Hayden Tufts (who founded the psychology laboratory at Michigan) and George Herbert Mead, and his student James Rowland Angell, this group began to reformulate psychology, focusing more strongly on the social environment and on the activity of mind and behavior than the psychophysics-inspired physiological psychology of Wundt and his followers had heretofore. Tufts left Michigan for another junior position at the newly-founded University of Chicago in 1892. A year later, the senior philosopher at Chicago resigned, and Tufts recommended to Chicago president William Rainey Harper that Dewey be offered the position. After initial reluctance, Dewey was hired in 1894. Dewey soon filled out the department with his Michigan companions Mead and Angell. These four formed the core of the Chicago School of psychology. In 1892, G. Stanley Hall invited 30-some psychologists and philosophers to a meeting at Clark with the purpose of founding a new American Psychological Association (APA). (On the history of the APA, see Evans, Staudt Sexton, & Cadwallader, 1992.) The first annual meeting of the APA was held later that year, hosted by George S. Fullerton at the University of Pennsylvania. Almost immediately tension arose between the experimentally- and philosophically-inclined members of the APA. Edward Bradford Titchener and Lightner Witmer launched an attempt to either establish a separate "Section" for philosophical presentations, or to eject the philosophers altogether. After nearly a decade of debate a Western Philosophical Association was founded and held its first meeting in 1901 at the University of Nebraska. The following year (1902), an American Philosophical Association held its first meeting at Columbia University. These ultimately became the Central and Eastern Divisions of the modern American Philosophical Association. In 1894, a number of psychologists, unhappy with the parochial editorial policies of the American Journal of Psychology approached Hall about appointing an editorial board and opening the journal out to more psychologists not within Hall's immediate circle. Hall refused, so James McKeen Cattell (then of Columbia) and James Mark Baldwin (then of Princeton University's Department of Psychology) co-founded a new journal, Psychological Review, which rapidly grew to become a major outlet for American psychological researchers. Beginning in 1895, James Mark Baldwin (Princeton University Department of Psychology) and Edward Bradford Titchener (Cornell) entered into an increasingly acrimonious dispute over the correct interpretation of some anomalous reaction time findings that had come from the Wundt laboratory (originally reported by Ludwig Lange and James McKeen Cattell). In 1896, James Rowland Angell and Addison W. Moore (Chicago) published a series of experiments in Psychological Review appearing to show that Baldwin was the more correct of the two. However, they interpreted their findings in light of John Dewey's new approach to psychology, which rejected the traditional stimulus-response understanding of the reflex arc in favor of a "circular" account in which what serves as "stimulus" and what as "response" depends on how one views the situation. The full position was laid out in Dewey's landmark article "The Reflex Arc Concept in Psychology" which also appeared in Psychological Review in 1896. Titchener responded in Philosophical Review (1898, 1899) by distinguishing his austere "structural" approach to psychology from what he termed the Chicago group's more applied "functional" approach, and thus began the first major theoretical rift in American psychology between Structuralism and Functionalism. The group at Columbia, led by James McKeen Cattell, Edward L. Thorndike, and Robert S. Woodworth, was often regarded as a second (after Chicago) "school" of American Functionalism (see, e.g., Heidbredder, 1933), although they never used that term themselves, because their research focused on the applied areas of mental testing, learning, and education. Dewey was elected president of the APA in 1899, while Titchener dropped his membership in the association. (In 1904, Titchener formed his own group, eventually known as the Society of Experimental Psychologists.) Jastrow promoted the functionalist approach in his APA presidential address of 1900, and Angell adopted Titchener's label explicitly in his influential textbook of 1904 and his APA presidential address of 1906. In reality, Structuralism was, more or less, confined to Titchener and his students. Functionalism, broadly speaking, with its more practical emphasis on action and application, better suited the American cultural "style" and, perhaps more important, was more popular among university trustees and private funding agencies. In no small measure because of the conservatism of the reign of Louis Napoléon (president, 1848-1852; emperor as "Napoléon III," 1852-1870), academic philosophy in France through the middle part of the 19th century was controlled by members of the eclectic and spiritualist schools, led by figures such as Victor Cousin (1792-1867), Théodore Jouffroy (1796-1842), and Paul Janet (1823-1899). These were traditional metaphysical schools, opposed to regarding psychology as a natural science. With the ouster of Napoléon III after the débacle of the Franco-Prussian war, new paths, both political and intellectual, became possible. From the 1870 forward, a steadily increasing interest in positivist, materialist, evolutionary, and deterministic approaches to psychology developed, influenced by, among others, the work of Hyppolyte Taine (1828-1893) (e.g., De L'Intelligence, 1870) and Théodule Ribot (1839-1916) (e.g., La Psychologie Anglaise Contemporaine, 1870). In 1876, Ribot founded Revue Philosophique (the same year as Mind was founded in Britain), which for the next generation would be virtually the only French outlet for the "new" psychology (Plas, 1997). Although not a working experimentalist himself, Ribot's many books were to have profound influence on the next generation of psychologists. These included especially his L'Hérédité Psychologique (1873) and La Psychologie Allemande Contemporaine (1879). In the 1880s, Ribot's interests turned to psychopathology, writing books on disorders of memory (1881), will (1883), and personality (1885), and where he attempted to bring to these topics the insights of general psychology. Although in 1881 he lost a Sorbonne professorship in the History of Psychological Doctrines to traditionalist Jules Soury (1842-1915), from 1885 to 1889 he taught experimental psychology at the Sorbonne. In 1889 he was awarded a chair at the Collège de France in Experimental and Comparative Psychology, which he held until 1896 (Nicolas, 2002). France's primary psychological strength lay in the field of psychopathology. The chief neurologist at the Salpêtrière Hospital in Paris, Jean-Martin Charcot (1825-1893), had been using the recently revivied and renamed (see above) practice of hypnoisis to "experimentally" produce hysterical symptoms in some of his patients. Two of his students, Alfred Binet (1857-1911) and Pierre Janet (1859-1947), adopted and expanded this practice in their own work. In 1889, Binet and his colleague Henri Beaunis (1830-1921) co-founded, at the Sorbonne, the first experimental psychology laboratory in France. Just five years later, in 1894, Beaunis, Binet, and a third colleague, Victor Henri (1872-1940), co-founded the first French journal dedicated to experimental psychology, L'Année Psychologique. In the first years of the 20th century, Binet was requested by the French government to develop a method for the newly-founded universal public education system to identify students who would require extra assistance to master the standardized curriculum. In response, with his collaborator Théodore Simon (1873-1961), he developed the Binet-Simon Intelligence Test, first published in 1905 (revised in 1908 and 1911). Although the test was used to effect in France, it would find its greatest success (and controversy) in the United States, where it was translated in by Henry H. Goddard (1866-1957), the director of the Training School for the Feebleminded in Vineland, New Jersey, and his assistant, Elizabeth Kite (a translation of the 1905 edition appeared in the Vineland Bulletin in 1908, but much better known was Kite's 1916 translation of the 1908 edition, which appeared in book form). The translated test was used by Goddard to advance his eugenics agenda with respect to those he deemed congenitally feeble-minded, especially immigrants from non-Western European countries. Binet's test was revised by Stanford professor Lewis M. Terman (1877-1956) into the Stanford-Binet IQ test in 1916. With Binet's death in 1911, the Sorbonne laboratory and L'Année Psychologique fell to Henri Piéron (1881-1964). Piéron's orientation was more physiological that Binet's had been. Pierre Janet became the leading psychiatrist in France, being appointed to the Salpêtrière (1890-1894), the Sorbonne (1895-1920), and the Collège de France (1902-1936). In 1904, he co-founded the Journale de Psychologie Normale et Pathologique with fellow Sorbonne professor Georges Dumas (1866-1946), a student and faithful follower of Ribot. Whereas Janet's teacher, Charcot, had focused on the neurologial bases of hysteria, Janet was concerned to develop a scientific approach to psychopathology as a mental disorder. His theory that mental pathology results from conflict between unconscious and conscious parts of the mind, and that unconscious mental contents may emerge as symptoms with symbolic meanings led to a public priority dispute with Sigmund Freud. Although the British had the first scholarly journal dedicated to the topic of psychology - Mind, founded in 1876 by Alexander Bain and edited by George Croom Robertson - it was quite a long while before experimental psychology developed there to challenge the strong tradition of "mental philosophy." The experimental reports that appeared in Mind in the first two decades of its existence were almost entirely authored by Americans, especially G. Stanley Hall and his students (notably Henry Herbert Donaldson) and James McKeen Cattell. Francis Galton's (1822-1911) anthropometric laboratory opened in 1884. There people were tested on a wide variety of physical (e.g., strength of blow) and perceptual (e.g., visual acuity) attributes. In 1886 Galton was visited by James McKeen Cattell who would later adapt Galton's techniques in developing his own mental testing research program in the United States. Galton was not primarily a psychologist, however. The data he accumulated in the anthropometric laboratory primarily went toward supporting his case for eugenics. To help interpret the mounds of data he accumulated, Galton developed a number of important statistical techniques, including the precursors to the scatterplot and the product-moment correlation coefficient (later perfected by Karl Pearson, 1857-1936). Soon after, Charles Spearman (1863-1945) developed the correlation-based statistical procedure of factor analysis in the process of building a case for his two-factor theory of intelligence, published in 1901. Spearman believed that people have an inborn level of general intelligence or g which can be crystallized into a specific skill in any of a number of narrow content area (s, or specific intelligence). Laboratory psychology of the kind practiced in Germany and the United States was slow in coming to Britain. Although the philosopher James Ward (1843-1925) urged Cambridge University to establish a psychophysics laboratory from the mid-1870s forward, it was not until the 1891 that they put so much as £50 toward some basic apparatus (Bartlett, 1937). A laboratory was established through the assistance of the physiology department in 1897 and a lectureship in psychology was established which first went to W. H. R. Rivers (1864-1922). Soon Rivers was joined by C. S. Myers (1873-1946) and William McDougall (1871-1938). This group showed as much interest in anthropology as psychology, going with Alfred Cort Haddon (1855-1940) on the famed Torres Straits expedition of 1898. In 1901 the Psychological Society was established (which renamed itself the British Psychological Society in 1906), and in 1904 Ward and Rivers co-founded the British Journal of Psychology. In 1896, one of Wundt's former Leipzig laboratory assistants, Oswald Külpe (1862-1915), founded a new laboratory in Würzburg. Külpe soon surrounded himself with a number of younger psychologists, most notably Narziß Ach (1871-1946), Karl Bühler (1879-1963), Ernst Dürr (1878-1913), Karl Marbe (1869-1953), and Henry Jackson Watt (1879-1925). Collectively, they developed a new approach to psychological experimentation that flew in the face of many of Wundt's restrictions. Wundt had drawn a distinction between the old philosophical style of self-observation (Selbstbeobachtung) in which one introspected for extended durations on higher thought processes and inner-perception (innere Wahrnehmung) in which one could be immediately aware of a momentary sensation, feeling, or image (Vorstellung). The former was declared to be impossible by Wundt, who argued that higher thought could not be studied experimentally through extended introspection, but only humanistically through Völkerpsychologie (folk psychology). Only the latter was a proper subject for experimentation. The Würzburgers, by contrast, designed experiments in which the experimental subject was presented with a complex stimulus (e.g., a Nietzschean aphorism or a logical problem) and after processing it for a time (e.g., interpreting the aphorism or solving the problem), retrospectively reported to the experimenter all that had passed through his consciousness during the interval. In the process, the Würzburgers claimed to have discovered a number of new elements of consciousness (over and above Wundt's sensations, feelings, and images) including Bewußtseinslagen (conscious sets), Bewußtheiten (awarenesses), and Gedanken (thoughts). In the English-language literature, these are often collectively termed "imageless thoughts," and the debate between Wundt and the Würzburgers as the "imageless thought controversy." Wundt referred to the Würzburgers' studies as "sham" experiments and criticized them vigorously. Wundt's most significant English student, Edward Bradford Titchener, then working at Cornell, intervened in the dispute, claiming to have conducted extended introspective studies in which he was able to resolve the Würzburgers imageless thoughts into sensations, feelings, and images. He thus, paradoxically, used a method of which Wundt did not approve in order to affirm Wundt's view of the situation (see Kusch, 1995; Kroker, 2003). The imageless thought debate is often said to have been instrumental in undermining the legitimacy of all introspective methods in experimental psychology and, ultimately, in bringing about the behaviorist revolution in American psychology. It was not without its own delayed legacy, however. Herbert Simon cites the work of one Würzburg psychologists in particular, Otto Selz (1881-1943), for having inspired him to develop his famous problem-solving computer algorithms (e.g., Logic Theorist and General Problem Solver) and his "thinking out loud" method for protocol analysis. In addition, Karl Popper studied psychology under Bühler and Selz, and appears to have brought some of their influence, unattributed, to his philosophy of science (Ter Hark, 2004). (This section adapted from Green, 2000, by permission of the author.) Whereas the Würzburgers debated with Wundt mainly on matters of method, another German movement, centered in Berlin, took issue with the widespread assumption that the aim of psychology should be to break consciousness down into putative basic elements. Instead, they argued that the psychological "whole" has priority and that the "parts" are defined by the structure of the whole, rather than vice versa. Thus, the school was named Gestalt, a German term meaning approximately "form" or "configuration." It was led by Max Wertheimer (1880-1943), Wolfgang Köhler (1887-1967), and Kurt Koffka (1886-1941). Wertheimer had been a student of Austrian philosopher, Christian von Ehrenfels (1859-1932), who claimed that in addition to the sensory elements of a perceived object, there is an extra element which, though in some sense derived from the organization of the standard sensory elements, is also to be regarded as being an element in its own right. He called this extra element Gestalt-qualität or "form-quality." For instance, when one hears a melody, one hears the notes plus something in addition to them which binds them together into a tune - the Gestalt-qualität. It is the presence of this Gestalt-qualität which, according to Von Ehrenfels, allows a tune to be transposed to a new key, using completely different notes, but still retain its identity. Wertheimer took the more radical line that "what is given me by the melody does not arise ... as a secondary process from the sum of the pieces as such. Instead, what takes place in each single part already depends upon what the whole is," (1925/1938). In other words, one hears the melody first and only then may perceptually divide it up into notes. Similarly in vision, one sees the form of the circle first - it is given "im-mediately" (i.e. its apprehension is not mediated by a process of part-summation). Only after this primary apprehension might one notice that it is made up of lines or dots or stars. Gestalt-Theorie was officially initiated in 1912 in an article by Wertheimer on the phi-phenomenon; a perceptual illusion in which two stationary but alternately flashing lights appear to be a single light moving from one location to another. Contrary to popular opinion, his primary target was not behaviorism, as it was not yet a force in psychology. The aim of his criticism was, rather, the atomistic psychologies of Hermann von Helmholtz (1821-1894), Wilhelm Wundt (1832-1920), and other European psychologists of the time. The two men who served as Wertheimer's subjects in the phi experiment were Köhler and Koffka. Köhler was an expert in physical acoustics, having studied under physicist Max Planck (1858-1947), but had taken his degree in psychology under Carl Stumpf (1848-1936). Koffka was also a student of Stumpf's, having studied movement phenomena and psychological aspects of rhythm. In 1917 Köhler (1917/1925) published the results of four years of research on learning in chimpanzees. Köhler showed, contrary to the claims of most other learning theorists, that animals can learn by "sudden insight" into the "structure" of a problem, over and above the associative and incremental manner of learning that Ivan Pavlov (1849-1936) and Edward Lee Thorndike (1874-1949) had demonstrated with dogs and cats, respectively. The terms "structure" and "organization" were focal for the Gestalt psychologists. Stimuli were said to have a certain structure, to be organized in a certain way, and that it is to this structural organization, rather than to individual sensory elements, that the organism responds. When an animal is conditioned, it does not simply respond to the absolute properties of a stimulus, but to its properties relative to its surroundings. To use a favorite example of Köhler's, if conditioned to respond in a certain way to the lighter of two gray cards, the animal generalizes the relation between the two stimuli rather than the absolute properties of the conditioned stimulus: it will respond to the lighter of two cards in subsequent trials even if the darker card in the test trial is of the same intensity as the lighter one in the original training trials. In 1921 Koffka published a Gestalt-oriented text on developmental psychology, Growth of the Mind. With the help of American psychologist Robert Ogden, Koffka introduced the Gestalt point of view to an American audience in 1922 by way of a paper in Psychological Bulletin. It contains criticisms of then-current explanations of a number of problems of perception, and the alternatives offered by the Gestalt school. Koffka moved to the United States in 1924, eventually settling at Smith College in 1927. In 1935 Koffka published his Principles of Gestalt Psychology. This textbook laid out the Gestalt vision of the scientific enterprise as a whole. Science, he said, is not the simple accumulation of facts. What makes research scientific is the incorporation of facts into a theoretical structure. The goal of the Gestaltists was to integrate the facts of inanimate nature, life, and mind into a single scientific structure. This meant that science would have swallow not only what Koffka called the quantitative facts of physical science but the facts of two other "scientific categories": questions of order and questions of Sinn, a German word which has been variously translated as significance, value, and meaning. Without incorporating the meaning of experience and behavior, Koffka believed that science would doom itself to trivialities in its investigation of human beings. Having survived the onslaught of the Nazis up to the mid-1930s (see Henle, 1978), all the core members of the Gestalt movement were forced out of Germany to the United States by 1935 (Henle, 1984). Köhler published another book, Dynamics in Psychology, in 1940 but thereafter the Gestalt movement suffered a series of setbacks. Koffka died in 1941 and Wertheimer in 1943. Wertheimer's long-awaited book on mathematical problem-solving, Productive Thinking was published posthumously in 1945 but Köhler was now left to guide the movement without his two long-time colleagues. (For more on the history of Gestalt psychology, see Ash, 1995.) As a result of the conjunction of a number of events in the early 20th century, behaviorism gradually emerged as the dominant school in American psychology. First among these was the increasing skepticism with which many viewed the concept of consciousness: although still considered to be the essential element separating psychology from physiology, its subjective nature and the unreliable introspective method it seemed to require, troubled many. William James' 1904 Journal of Philosophy... article "Does Consciousness Exist?", laid out the worries explicitly. Second was the gradual rise of a rigorous animal psychology. In addition to Edward Lee Thorndike's work with cats in puzzle boxes in 1898, the start of research in which rats learn to navigate mazes was begun by Willard Small (1900, 1901 in American Journal of Psychology). Robert M. Yerkes's 1905 Journal of Philosophy... article "Animal Psychology and the Criteria of the Psychic" raised the general question of when one is entitled to attribute consciousness to an organism. The following few years saw the emergence of John Broadus Watson (1878-1959) as a major player, publishing his dissertation on the relation between neurological development and learning in the white rat (1907, Psychological Review Monograph Supplement; Carr & Watson, 1908, J. Comparative Neurology & Psychology). Another important rat study was published by Henry H. Donaldson (1908, J. Comparative Neurology & Psychology). The year 1909 saw the first English-language account of Ivan Pavlov's studies of conditioning in dogs (Yerkes & Morgulis, 1909, Psychological Bulletin). A third factor was the rise of Watson to a position of significant power within the psychological community. In 1908, Watson was offered a junior position at Johns Hopkins by James Mark Baldwin. In addition to heading the Johns Hopkins department, Baldwin was the editor of the influential journals, Psychological Review and Psychological Bulletin. Only months after Watson's arrival, Baldwin was forced to resign his professorship due to scandal. Watson was suddenly made head of the department and editor of Baldwin's journals. He resolved to use these powerful tools to revolutionize psychology in the image of his own research. In 1913 he published in Psychological Review the article that is often called the "manifesto" of the behaviorist movement, "Psychology as the Behaviorist Views It." There he argued that psychology "is a purely objective experimental branch of natural science", "introspection forms no essential part of its methods..." and "The behaviorist... recognizes no dividing line between man and brute". The following year, 1914, his first textbook, Behavior went to press. Although behaviorism took some time to be accepted as a comprehensive approach (see Samelson, 1981), (in no small part because of the intervention of World War I), by the 1920s Watson's revolution was well underway. The central tenet of early behaviorism was that psychology should be a science of behavior, not of the mind, and rejected internal mental states such as beliefs, desires, or goals. Watson himself, however, was forced out of Johns Hopkins by scandal in 1920. Although he continued to publish during the 1920s, he eventually moved on to a career in advertising (see Coon, 1994). Among the behaviorists who continued on, there were a number of disagreements about the best way to proceed. Neo-behaviorists such as Edward C. Tolman, Edwin Guthrie, Clark L. Hull, and B. F. Skinner debated issues such as (1) whether to reformulate the traditional psychological vocabulary in behavioral terms or discard it in favor of a wholly new scheme, (2) whether learning takes place all at once or gradually, (3) whether biological drives should be included in the new science in order to provide a "motivation" for behavior, and (4) to what degree any theoretical framework is required over and above the measured effects of reinforcement and punishment on learning. By the late 1950s, Skinner's formulation had become dominant, and it remains a part of the modern discipline under the rubric of Behavior Analysis. Behaviorism was the ascendant experimental model for research in psychology for much of the 20th century, largely due to the creation and successful application (not least of which in advertising) of conditioning theories as scientific models of human behaviour. In 1918, Jean Piaget (1896-1980) turned away from his early training in Natural History and began post-doctoral work in psychoanalysis in Zurich. In 1919, he moved to Paris to work at the Binet-Simon Lab. However, Binet had died in 1911 and Simon lived and worked in Rouen. His supervision therefore came (indirectly) from Pierre Janet, Binet's old rival and a professor at the College de France. The job in Paris was relatively simple: to use the statistical techniques he had learned as a natural historian, studying molluscs, to standardize Cyril Burt's intelligence test for use with French children. Yet without direct supervision, he soon found a remedy to this boring work: exploring why children made the mistakes they did. Applying his early training in psychoanalytic interviewing, Piaget began to intervene directly with the children: "Why did you do that?" (etc.) It was from this that the ideas formalized in his later stage theory first emerged. In 1921, Piaget moved to Geneva to work with Edouard Claparède at the Rousseau Institute. In 1936, Piaget received his first honorary doctorate from Harvard. In 1955, the International Center for Genetic Epistemology was founded: an interdisciplinary collaboration of theoreticians and scientists, devoted to the study of topics related to Piaget's theory. In 1969, Piaget received the "distinguished scientific contributions" award from the American Psychological Association. Noam Chomsky's (1957) review of Skinner's book Verbal Behavior (that aimed to explain language acquisition in a behaviorist framework) is considered one of the major theoretical challenges to the type of radical behaviorism that Skinner taught. Chomsky showed that language could not be learned solely from the sort of operant conditioning that Skinner postulated. Chomsky's argument was that as people could produce an infinite variety of sentences unique in structure and meaning, and that these could not possibly be generated solely through experience of natural language. As an alternative, he concluded that there must be internal mental structures - states of mind of the sort that behaviorism rejected as illusory. Similarly, work by Albert Bandura showed that children could learn by social observation, without any change in overt behaviour, and so must be accounted for by internal representations. The rise of computer technology also promoted the metaphor of mental function as information processing. This, combined with a scientific approach to studying the mind, as well as a belief in internal mental states, led to the rise of cognitivism as the dominant model of the mind. Links between brain and nervous system function were also becoming common, partly due to the experimental work of people like Charles Sherrington and Donald Hebb, and partly due to studies of people with brain injury (see cognitive neuropsychology). With the development of technologies for accurately measuring brain function, neuropsychology and cognitive neuroscience have become some of the most active areas in contemporary psychology. With the increasing involvement of other disciplines (such as philosophy, computer science, and neuroscience) in the quest to understand the mind, the umbrella discipline of cognitive science has been created as a means of focusing such efforts in a constructive way. Not all psychologists, however, have been content to follow what they perceive as mechanical models of the mind and human nature. Carl Jung, a one-time follower and contemporary of Freud, was instrumental in introducing notions of spirituality into Freudian psychoanalysis (Freud had rejected religion as a mass delusion). The soul is explored in-depth in the Neo-Jungian school of archetypal psychology. Alfred Adler, after a brief association with Freud's discussion circle, left to form his own discipline, called Individual (indivisible) Psychology. His influence on contemporary psychology has been considerable, with many approaches borrowing fragments of his theory. A recent rebirth of his legacy, Classical Adlerian Psychology, combines Adler's original theory of personality, style of psychotherapy, and philosophy of living, with Abraham Maslow's vision of optimal functioning. Humanistic psychology emerged in the 1950s and has continued as a reaction to positivist and behaviorist approaches to the mind. It stresses a phenomenological view of human experience and seeks to understand human beings and their behavior by conducting qualitative research. The humanistic approach has its roots in existentialist and phenomenological philosophy and many humanist psychologists completely reject a scientific approach, arguing that trying to turn human experience into measurements strips it of all meaning and relevance to lived existence. Some of the founding theorists behind this school of thought are Abraham Maslow, who formulated a hierarchy of human needs; Carl Rogers, who created and developed client centred therapy; and Fritz Perls, who helped create and develop Gestalt therapy. A further development of Humanistic psychology emerging in the 1970s was Transpersonal psychology, which studies the spiritual dimension of humanity, looking at the possibilities for development beyond the normal ego-boundaries.This was taken directly from WIKIPEDIA...I claim no responsibility ---Damagedgoods23

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