For one group of pigeons, a black vertical bar on a white key light served as the S+ and the blank key light the S-. For another, the bar served as the S- and the blank key light the S+.When the bar was rotated toward the horizontal, the first group decreased pecking, and the second increased pecking.This demonstrates that
A)the response required influences discrimination training.
B)excitatory and inhibitory conditioning can occur in discrimination training.
C)discrimination training results in either excitatory or inhibitory conditioning, but not both.
D)overshadowing can influence discrimination training.

Question

Quizplus · Accepted Answer

This experiment demonstrates that excitatory and inhibitory conditioning can occur in discrimination training, as one group learned to peck at the presence of the bar (S+) while the other group learned to avoid pecking at the bar (S-). When the bar was rotated, the first group decreased pecking as they were no longer presented with the clear S+ signal, while the second group increased pecking as the bar became a more salient cue for them.

For One Group of Pigeons, a Black Vertical Bar on a White