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. 2014 Aug 26;8:244. doi: 10.3389/fnins.2014.00244

Figure 1.

Figure 1

Experimental procedures in the (A) conditioning and (B) data acquisition phases. One of the multiple images was presented at every trial. CS+, aversively conditioned face stimuli; CS−, unconditioned stimuli. All the faces were neutral; CS+ was followed by a noise burst in (A) (all) and (B) (50%).

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