Discrimination and switching learning in normal, familial retarded, and organic retarded children.

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Abstract
In an effort to explicate the contradictory findings of earlier studies, normals, familial retardates, and organic retardates at 2 mental age (MA) levels were trained on either a 3-choice or a 2-choice discrimination task. Following solution of the original task subjects were switched to either a new 3-choice discrimination, a 2-choice transposition, or a 2-choce reversal problem. There were no significant types of subject''s main effects on either the first or second problems. The findings offered no support for the view that the cognitive functioning of retardates is inherently different from normals of the same MA.

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