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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Behav Neurosci. 2017 Feb 20;131(2):168–175. doi: 10.1037/bne0000186

Figure 2. Skin conductance responses.

Figure 2

(A) Fear-conditioning involving either a low-intensity (LI) unconditioned stimulus or a high-intensity (HI) US both lead to succesful fear acquisition as defined by greater SCRs on conditioned stimulus trials intermittently paired (CS+) versus unpaired (CS−) with the US. (B) The group who underwent fear-conditioning to a CS+ paired with a low-intensity US (square) produced effectively no generalization of SCRs to novel tones between the CS+ and CS− frequency. In contrast, the group who underwent fear-conditioning to a CS+ paired with a high-intensity US (circles) showed widespread generalization of SCRs. Dashed rectangle indicates a priori analysis of threat-sensitive generalization for stimuli adjacent to the CS+. Data from CS+ trials included trials unpaired with the US only. Grey and White fill denote CS+ and CS−, respectively. Error bars reflect standard error of the mean. ** P < .01.