A STATISTICAL term for the internal consistency of a test; the extent to which it can be expected to produce the same result on different occasions.

Practical knowledge. A CONSCIOUS ‘knowing how’ to do something. Compare with DECLARATIVE KNOWLEDGE.

In general the properties of the mind or psyche; popularly used for a person supposedly possessing spiritual or extrasensory powers.

The time elapsed between the presentation of a stimulus and the subject’s response to it.

A social group with which one associates on more or less equal terms. Used especially of CHILDHOOD and ADOLESCENCE.

Used in CONDITIONING as a way of increasing the strength of a given response by rewarding it.

Where a psychologist reads into someone else’s MIND what is present in his own.

Literally, the PATHOLOGY of the PSYCHE. The study of psychological disturbances and their origins.

BRAIN surgery directed at curing a severe psychological disorder.

A situation developed out of GAME THEORY and used by SOCIAL PSYCHOLOGISTS in the study of bargaining BEHAVIOUR. In the game two suspects are caught by the police and questioned separately about the crime. If one prisoner confesses and the other does not the squealer is set free and the fall guy takes the rap. If both confess, both are convicted but dealt with leniendy. If neither confesses, both benefit because they cannot then be convicted.