Peak shift is said to occur when two A) stimuli are so similar that subjects have difficulty distinguishing between them, and thus the peak of the responses shifts so that they respond similarly to both. B) discriminative stimuli are very similar and produce maximal responding to a stimulus near the S^Dand away from the S^Δ. C) similar stimuli are reinforced and produce a broader peak of maximal responding to more stimuli than would have occurred if only one stimulus had been reinforced. D) discriminative stimuli are dissimilar and produce maximal responding to a stimulus midway between the S^Dand the S^Δ.

Question

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Peak shift occurs when an organism is trained to discriminate between two stimuli and then shows a shift in the peak of its response rate towards a stimulus that is further away from the non-reinforced stimulus than the original reinforced stimulus. This happens because the organism not only learns to respond to the positive stimulus but also to avoid the negative stimulus, causing a shift in the peak response away from the negative stimulus.

Peak Shift Is Said to Occur When Two