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In analytical psychology, a reduced state of concentration and attention, accompanied by a loosening of inhibitions and relaxation of restraints, in which unexpected contents may emerge from the...

Inability to walk. Compare dysbasia. [From Greek a- without  +  basis a step, from bainein to step or go  +  -ia indicating a condition or quality]

1 A model used in rational emotive behaviour therapy (REBT) for analysing a client's problems systematically into: A, the activating event; B, the mediating evaluative beliefs; and C, behavioural and...

Either of the sixth pair of cranial nerves controlling the lateral rectus muscles of the eyes, turning the eye outwards for a sidelong direction of gaze. Paralysis of this nerve causes convergent...

1 A deviation from what is normal, usual, or right. See also chromosomal aberration.

2 A temporary lapse of behaviour or mental function. 

3 A defect of the crystalline lens of the eye, or of any other...

A test that measures a person's current level of performance or that estimates future performance. The term sometimes denotes an achievement test, sometimes an aptitude test, and sometimes an...

A basic research method of physiological psychology based on ablation, especially during the first three-quarters of the 20th century, in which an attempt is made to determine the functions of a...

Discrimination against people who are not able-bodied, or an assumption that it is necessary to cater only for able-bodied people. The term was coined by US feminists in the 1980s and was later used...

1 The slight change in the hue of monochromatic light when its lightness changes as a result of white light being added to it.

2 A perceptual phenomenon whereby a large surface that is suddenly...

The principle according to which the total luminance of light composed of several wavelengths is equal to the sum of the luminances of its monochromatic components. [Named after the English chemist...