The generalization gradients produced by generalization testing following simple tone-on S+ discrimination learning, simple tone-on S- discrimination learning, and S+/S- discrimination learning were different in several respects. The differences included all of the following EXCEPT
a. the maximum of the simple tone-on S+ gradient was highest of all.
b. the S+/S- gradient was narrower than either of the other two gradients.
c. although the simple tone-on S- gradient was U-shaped, the other two gradients had an inverted-U shape.
d. the maxima of the simple tone-on S- gradient were lower than those for the other two gradients.
a. the maximum of the simple tone-on S+ gradient was highest of all.
Answer feedback: The maximum of the S+/S- generalization gradient was highest of all.
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