Figure 2.

Design for Experiment 2. A, Timeline for procedures and tasks. B, Signaled FC paradigm consisted of training to three tone–shock pairings on the training day in context A, context extinction on day 2 in context A, and tone extinction on day 3 in context B. Axes show timing of tones (speaker icon), shocks (lightning icon), and 1 min blocks (tick marks). C, 2D cxtSOR task consisted of two sample phases in context 1 and context 2 followed by a test phase in which both objects are presented in context 1. The arrow indicates the novel object–context pairing. Context was operationalized as floor pattern only. 2D object images were presented vertically on a monitor. D, Clipart images served as 2D objects; a new pair was used for each run (4 runs, 24 h apart).