Predictions about the effect of interstimulus intervals (ISIs) in desensitization were made from the habituation model and tested with a series of Ss, each serving as his own control. Strong items desensitized faster with long ISIs, though weak items were not affected. No effects on long-term response decrements were found. A second experiment examined an interpretation of the stimulus-length effect in desensitization in terms of an extension of the recovery period between stimulus onsets. The results permitted rejection of the hypothesis.
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