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Tests designed to identify creative talentIn recent years a number of psychologists have turned their attention to the subject of creativity, for two major...

A personality pattern disturbance characterized by frequently alternating moods of elation and dejection.The cyclothymic (or cycloid) individual tends to be extraversive, responsive, and socially...

The scientific study of the behavior and development of the child from the time of conception to the beginning of adolescence.At the present time...

The most important fact here is that the organism as a whole, and not just the visual system, is involved in our reactions to...

Activated or transmitted by acetylcholine. Acetylcholine is one of the two types of “chemical transmitters” in the nervous system; the other type includes adrenalin...

A three-dimensional figure representing all degrees and combinations of hue, saturation, and brightness in the perception of color; also called the color cone, color...

The cortical part of the limbic system of the brain, lying just above the corpus callosum (plate 1).Although the functions of this structure are...

Circuitous, “labyrinthine” speech; the inclusion of numerous trivial and often irrelevant details in relating an incident, explaining a point, or answering a question. The...

Transient situational personality disorders resulting from severely traumatic experiences in civilian life, classified by the American Psychiatric Association (1952) under the subheading “Gross Stress...

An association of words or ideas by similarity of sound.Young children often use clang associations when they talk or sing to themselves. A typical...