Figure 2. Freezing and vocalization during day 1 and during the context test.
(A and B) Freezing and vocalization over time on day 1. The aversive-experience (AE) group froze (part A) and vocalized (part B) more than the context-exposure (CE) group. The first three minutes served as the baseline period. The AE group then received 5 shocks over the next 13 min. The CE group remained in the chamber for the same duration but did not receive shocks. (C and D) Freezing and vocalization over time during the context test. The AE group froze (part C) and vocalized (part D) more than the CE group.