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Absolute Idealism the philosophical position that both mental and material realities are manifestations of a universal and absolute mind or spirit. See…

Ability Trait a personality trait that involves an individual’s capacity to attain his or her goals. It is one of three classes…

Ability Test 1. a norm-referenced standardized test designed to measure competence or capacity to perform physical or mental activity. 2. a test measuring…

Ability Parameter (symbol: θ) in item response theory, a theoretical value that represents a person’s capability or probable performance on a task.…

Ability Level an index of achievement or performance that reports the absolute or relative ability of the participant in relation to the…

Ability Grouping 1. the assignment of pupils to school classes on the basis of their learning ability. 2. the practice of dividing a class…

Ability n. existing competence or skill to perform a specific physical or mental activity. Although ability may be either innate or developed…

Abience n. a response or behavior that results in movement away from a stimulus, either by physical withdrawal from the stimulus or by…

Aberration n. 1. any deviation, particularly a significant or undesirable one, from the normal or typical. See also a mental aberration. 2. in…

Aberrant Response an abnormal or atypical behavior, commonly targeted during a behavioral intervention.