Fig. 9.

Response choice during stimulus conflict, Experiment 2. The Y axes show correct and incorrect lever presses per minute. (A) Acquisition of the conditional discriminations in blocks of two sessions. (B) In extinction, both groups showed accurate performance to the single elements used throughout acquisition. (C) In extinction, both groups showed accurate discrimination performance to congruent compounds. (D) Performance during early (the first 10 s) and late presentation of incongruent compounds. Error bars ± standard error of the mean.