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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Neurobiol Learn Mem. 2013 Dec 11;113:149–156. doi: 10.1016/j.nlm.2013.12.003

Figure 2.

Figure 2

Mean conditioned responses (CR; skin conductance response to CS+ minus CS-) during late acquisition, late extinction, and a second day extinction retrieval test for participants previously exposed to escapable (ES) or inescapable (IS) stress, and control (C) participants. ES and C participants, but not IS, exhibited decreased CRs during extinction. At day two retrieval test, ES fear expression remained low, C participants showed evidence of spontaneous recovery, and IS CRs increased and were significantly higher than those of ES participants. * p < .05, † p < .1.