Abstract
Twenty-four differentially reared male rhesus monkeys were used in this experiment. The animals were tested on a four choice match-to-sample task. The results indicated that (1) performance of complex discrimination improves for social subdominant animals changed to isolation; (2) performance of the same task shows a decrement for isolated animals which became sub-dominant after a change to a state of social companionship; (3) control animals and dominant animals were not affected by social changes; and (4) social status along the dominant-subdominant scale seems to be more important for prediction of performance than the perceptual conditions of the living environment.
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