It would imply the intellectual ability of a person prior to a disease.
In research on schizophrenia, the social and sexual adjustment of the individual before the onset or diagnosis of the symptoms. Patients with good premorbid adjustment are those found to have been relatively normal earlier. Those with poor premorbid adjustment had inadequate interpersonal and sexual relations.
Dementia means deterioration of intellectual functioning.
Intellectual functioning level is defined by standardized tests that measure the ability to reason in terms of mental age (intelligence quotient or IQ).
Borderline deficient and borderline retarded.
The Structured Observation of Intellectual Functioning is a observational system that is used to detect mental retardation. Cognitive function is examined while individuals complete daily activities.
Psychosis
Is the sub average intellectual functioning of an I.Q of approximately 75%
The school psychologist tested our son and found his intellectual functioning to be within the normal range for his age.
The Stanford-Binet is a commonly used assessment for intellectual functioning. Simply put- It is an IQ test.
Piaget referred to the active intellectual functioning of infants as "sensorimotor intelligence." This stage of development involves infants using their senses and motor skills to explore and interact with their environment as they learn and develop cognitive abilities.
An older person's intelligence level can decline and its due to biological changes. However environmental factors as level of income, level of education, job experience, etc. can help older people maintain very high levels of intellectual functioning.
According to Spearman's theory, performance in intellectual tasks is determined by a general mental ability factor called "g" or general intelligence. This factor influences overall cognitive functioning and is thought to underlie performance on diverse intellectual tasks.