Discrimination reversal training with single and multiple stimulus pairs in the squirrel monkey

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2 groups of squirrel monkeys were used to study discrimination reversal with a single pair vs. multiple pairs of problem objects. The Single-Pair group required twice the number of trials that the Multiple-Pair group required to achieve successively the criterional performance of 6 consecutive correct responses. Subsequently, both groups were given criterional discrimination reversal problems with multiple-problem pairs. As both groups performed equally throughout this phase, earlier differences were interpreted as reflecting a performance variable rather than increased error factors in the Single-Pair condition. Terminal test performance for combined groups was 88% correct on prereversal and 82% correct on reversal trials. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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