In which situation has a "peak shift" phenomenon occurred? A) Discrimination training using an orange S^D and yellow-orange S^Δ light produces maximal responding to a red stimulus. B) Discrimination training results in a flat peak, with equal responding to the original training stimulus and several similar stimuli on either side of it. C) Discrimination training using a loud tone and a bright light produces maximal responding to comparison tones and lights of moderate intensity. D) Discrimination training produces two peaks in responding, one occurring at the S^Dandthe other at the S^Δ.

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Quizplus · Accepted Answer

Peak shift occurs when discrimination training with two stimuli (one reinforced, one not) leads to a maximal response to a new stimulus that is further away from the non-reinforced stimulus than the reinforced one, as seen in the shift towards a red stimulus after training with orange and yellow-orange lights.

In Which Situation Has a "Peak Shift" Phenomenon Occurred