Find over 25,000 psychological definitions


astigmatism

n. a visual disorder in which the light rays of a visual stimulus do not all focus at a single point on the retina due to uneven curvature of the cornea or lens. As a result, light rays are refracted more in one meridian (that of the greatest curvature) than in the other at right angles to it (that of least curvature). The effect is an aberration or distortion of the visual image that makes it difficult to see fine detail. —astigmatic adj.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

February 23rd 2025

competition

competition

n. any performance situation structured in such a way that success depends on performing better than others. Interpersonal competition involves individuals striving to outperform each other; intergroup competition involves groups competing against other groups, with such groups including both small, face-to-face gatherings and very large groups, such as nations; intragroup competition involves individuals within a group trying to best each other. Because competing individuals sometimes increase their chances of success by actively undermining others’ performances, such goal structures can lead to conflict. Compare cooperation. —compete vb. —competitive adj.