Table 2. Design of Experiment 2.

Group	2-Day training treatment:	Testing treatment
(1) Pseudoconditioned noise-shock only noise test	10 Shocks (1-mA, 1 s, 150–210 s intertrial interval)	5 Noise presentations (10 s)
(2) Pseudoconditioned tone-shock only tone test	10 Shocks (1-mA, 1 s, 150–210 s intertrial interval)	5 Tone presentations (10 s)
(3) No shock control	Context exposure only (17 min and 15 s per day)	5 Noise presentations (10 s)
(4) Noise-shock conditioning	10 Noise (10 s)→shock pairings	5 Noise presentations (10 s)