Abstract
Children (average age 6 years 7 months) learned an initial discrimination (OL) and a reversal shift (RS) with 1 dimension relevant and either 0, 1, or 2 dimensions irrelevant following pretraining which required Ss to make same-different judgments to stimulus objects varying along the dimensions appearing in the transfer tasks. Pretraining did not affect performance in OL relative to a control condition, and performance degraded as a linear function of number of irrelevant dimensions. In RS, perceptually pretrained and control Ss did not differ under the condition of 0 dimensions irrelevant, but with increasing amounts of irrelevant stimulation the performance of the control Ss deteriorated in the same manner as in OL while the performance of perceptually pretrained Ss was unaltered.
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