Hans Eysenck's personality theories was based on three universal traits. The degree of introversion/extroversion, moodiness or even temperedness he called neuroticism/emotional stability and psychoticism.
The personality type of an unstable extrovert.
Hippocrates and Carl Jung
The word for "and" in German is und. Here are a couple of examples in German. Hans und Franz = Hans and Franz; Essen und Trinken = to eat and to drink.
Hans Eysenck believed that biological differences are responsible for variations in personality traits from person to person. (Essentials of Psychology by Jeffery S. Nevid)
Hans Eysenck and the many followers after his death are not taking into account modern research findings. Wikipedia describes many contradictory personality traits. All except one (Enneagram) recognize the effect of the situational environment of the person. Healthy people are sensitive to their environments. Most personality theories ignores the sociological factors, as well as the psycho-medical situation of the person.
*Psychoticism."Psychoticismis one of the three traits used by the psychologist Hans Eysenck in his P-E-N model (psychoticism, extraversion and neuroticism) model of personality. Psychoticism refers to a personality pattern typified by aggressiveness and interpersonal hostility."
A limitation of Hans Selye's work on stress is that it primarily focused on the physiological aspects of stress, neglecting the psychological and emotional components. Additionally, his theories have been criticized for oversimplifying the stress response and not accounting for individual differences in how people perceive and cope with stress.
Sigmund Freud: Personality is shaped by unconscious drives and childhood experiences. Carl Jung: Personality is influenced by both conscious and unconscious aspects, including personal and collective unconscious. Albert Bandura: Personality is a result of interactions between personal factors, behavior, and the environment. Hans Eysenck: Personality is determined by genetic factors and environmental influences on an individual's biological systems.
Sigmund Freud's case study of "Little Hans" demonstrated how childhood experiences and internal conflicts can shape personality development. The "Minnesota Study of Twins Reared Apart" showed the impact of genetics and environment on personality development by comparing identical twins raised in different households. The "Harlow Monkey Experiments" highlighted the importance of social interaction and attachment in the early stages of life for personality development.
Perhaps you mean Jan van Eyck.
Hans Coray has written: 'Hans Coray'
Hans Hinterreiter has written: 'Hans Hinterreiter'