AMYGDALA (Amygdaloid Complex)
A brain structure located beneath the frontal lobe and involved in the control of emotion and motivation.The amygdala is a…
ANAL CHARACTER
A psychoanalytic term for a group of personality traits believed to stem from the anal stage of psychosexual development.Between the…
ANAL EROTISM
Psychoanalytic term for pleasurable sensations associated with the anal region.These sensations arise in infancy during the anal phase of psychosexual…
ANTISOCIAL REACTION
A form of “socio- pathic personality disturbance” characterized by impulsive, egocentric, unethical behavior.The antisocial, or psychopathic, individual acts as if…
APRAXIA (literally, “inability to act or do”)
Loss of ability to perform purposeful movements or manipulate common objects.This disorder is caused by injury or disease which damages…
ARACHNODACTYLY (Marfan’s syndrome)
A rare inherited disorder characterized by long limbs and spidery hands and feet (the term means “spidery fingers”), and usually…
AFTERIMAGE (Aftersensation)
A sensation that arises out of another sensation immediately after the original stimulation ceases. A positive afterimage is a continuation…
AER HUNGER
Our breathing is so regular and automatic that we usually take it for granted. Yet the effects of deprivation are…
ALCOHOLIC ADDICTION
Chronic dependence on the use of alcoholic beverages. In 1949 a committee of the World Health Organization defined alcoholics as…
ALLOPSYCHIC
A general term characterizing the assignment or projection of one’s own thoughts or ideas to people or events in the…
ABSOLUTE THRESHOLD
The minimum level of stimulation that can be detected 50 per cent of the time; also called “detection threshold.” What…
ACATHISIA (AKATHISIA, AKATIZIA)
While this term literally means “not sitting,” and was originally applied to an impaired ability to sit down or sit…
ACHIEVEMENT TESTS
Tests designed to measure knowledge or skill attained through training in a specific subject or area. Achievement tests are usually…
ACROCEPHALY
A disorder characterized by an exceptionally high skull and severe mental retardation. In one syndrome (Crouzon) these symptoms are associated…
ACTIVE PSYCHOTHERAPY
A treatment procedure in which the patient is directed to make a graduated series of changes in his behavior. Active…
ACT PSYCHOLOGY
Formulated by the German philosopher Franz Bren- tano (1838-1917) in 1874, this approach proposed to focus psychological investigation on psychic…
ADOLESCENCE (Theories)
Adolescence is probably the most controversial of all periods of human development. Since the beginning of this century literally dozens…