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The science dealing with the study of mental processes and behavior in man and animals.


psychology [Subheading]

Used with non-psychiatric diseases, techniques, and named groups for psychologic, psychiatric, psychosomatic, psychosocial, behavioral, and emotional aspects, and with psychiatric disease for psychologic aspects; used also with animal terms for animal behavior and psychology.

Year introduced: 1978


Psychology, Developmental

Field of study concerned with age-related changes in BEHAVIOR that occur in human beings over the course of life, from birth to death. It includes all aspects of human growth, including emotional, intellectual, social, perceptual and personality development.

Year introduced: 2015


Recognition, Psychology

The knowledge or perception that someone or something present has been previously encountered.

Year introduced: 2020 (1998)


Self Psychology

Psychoanalytic theory focusing on interpretation of behavior in reference to self. (From APA, Thesaurus of Psychological Terms, 1994) This elaboration of the psychoanalytic concepts of narcissism and the self, was developed by Heinz Kohut, and stresses the importance of the self-awareness of excessive needs for approval and self-gratification.

Year introduced: 1997


Unconscious, Psychology

Those forces and content of the mind which are not ordinarily available to conscious awareness or to immediate recall.

Year introduced: 2020 (1969)


Transference, Psychology

The unconscious transfer to others (including psychotherapists) of feelings and attitudes which were originally associated with important figures (parents, siblings, etc.) in one's early life.

Year introduced: 2020 (1965)


Transfer, Psychology

Change in learning in one situation due to prior learning in another situation. The transfer can be positive (with second learning improved by first) or negative (where the reverse holds).

Year introduced: 2020 (1965)


Set, Psychology

Readiness to think or respond in a predetermined way when confronted with a problem or stimulus situation.

Year introduced: 2020 (1965)


Schizophrenic Psychology

Study of mental processes and behavior of schizophrenics.


Retention, Psychology

The persistence to perform a learned behavior (facts or experiences) after an interval has elapsed in which there has been no performance or practice of the behavior.

Year introduced: 2020 (1979)


Repression, Psychology

The active mental process of keeping out and ejecting, banishing from consciousness, ideas or impulses that are unacceptable to it.


Religion and Psychology

The interrelationship of psychology and religion.


Rejection, Psychology

Non-acceptance, negative attitudes, hostility or excessive criticism of the individual which may precipitate feelings of rejection.

Year introduced: 2020 (1975)


Reinforcement, Psychology

The strengthening of a conditioned response.

Year introduced: 2020 (1965)


Regression, Psychology

A return to earlier, especially to infantile, patterns of thought or behavior, or stage of functioning, e.g., feelings of helplessness and dependency in a patient with a serious physical illness. (From APA, Thesaurus of Psychological Index Terms, 1994).

Year introduced: 2020 (1963)


Psychology, Social

The branch of psychology concerned with the effects of group membership upon the behavior, attitudes, and beliefs of an individual.


Psychology, Military

The branch of applied psychology concerned with psychological aspects of selection, assignment, training, morale, etc., of Armed Forces personnel.


Psychology, Medical

A branch of psychology in which there is collaboration between psychologists and physicians in the management of medical problems. It differs from clinical psychology, which is concerned with the diagnosis and treatment of behavior disorders.

Year introduced: 1983


Psychology, Industrial

The branch of applied psychology concerned with the application of psychologic principles and methods to industrial problems including selection and training of workers, working conditions, etc.

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