Acquisition of secondary reward by cues associated with shock reduction.

The relation of secondary reinforcement to delayed reward in visual discrimination learning.

1948 • 312 citations

Response fixation under anxiety and non-anxiety conditions.

1948 • 95 citations

Learning theory and "abnormal fixations."

1953 • 19 citations

Magnitude of reward and acquisition of a black-white discrimination habit.

1953 • 14 citations