Pigeon A and B were both trained with an S of a 800 Hz tone. Pigeon A then had an S- of 700 Hz. Pigeon B was trained with an S- of 400 Hz. Which pigeon is likely to exhibit the most (if any) peak shift

Both Pigeon A and B

Explanation:

Peak shift is a term that describes the conditions in which the peak of the generalization gradient moves away from the position of S+ in the direction away from the S-. This implies that, peak shift can be determined if the S+ and S - tigger the existing factors during different training in a graded manner.

Thus, if both S+ and - has mutual characteristics, then a major part of those characteristics will be triggered by both stimuli, thus, the stimulating experience of S+ will override or revoke the experience or training of S-.

Hence, since both pigeon A and B, had the S+ 800Hz tone training initially, with elemental theories, it is determined that, both will produce most peak shift phenomenon.

Note:

S+ is a stimulus showing availability of reinforcement

S- is a stimulus showing lack of reinforcement.

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