Sources of transfer from original training to discrimination reversal.

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Abstract
One hundred and four white rats were trained on 2 simultaneous discrimination problems; Problem A was presented on 3 out of 4 trials, Problem B on 1 out of 4 trials. Half of the Ss were reversed on Problem A and half on Problem B. Whether reversed immediately after reaching criterion on Problem A or after overtraining on Problem A, groups that were reversed on Problem A performed significantly poorer than controls that were treated identically except that they were reversed on Problem B instead of Problem A. Also, a source of transfer was identified that could account for a positive effect of overtraining trials on discrimination reversal under some conditions.

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