Fig. 1.

Top panel: Responding during stages 1 and 2 of Experiment 1, during the target CSs when signalled by the occasion setters and when presented alone; responding to the occasion setters and transfer CSs is also presented. Blocks 1–2 represent 8-session blocks, and blocks 3–5 6-session blocks. Bottom panel: Responding on same and different trials to the transfer CSs signalled by the occasion setters, and the transfer CSs alone, in the third test of Experiment 1. The data are presented in two-session blocks.