Figure 4.

Mean CRs (mean CS-preCS magazine entries per minute ± SEM) across extinction sessions. Lines represent responding in blocks of four trials across the first extinction session and the recovery and reinstatement sessions. The first bar (Trial 1) represents responding on the first trial of the first extinction session. The second and third bars represent the mean responding on the first trial of extinction sessions testing for spontaneous recovery (Rec; i.e., sessions 2, 4, and 6) and reinstatement (Rein; i.e., sessions 3, 5, and 7), respectively.