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(A) Mean SCR (n = 19) by stimulus during late acquisition, extinction, and reextinction (second half); recovery test (first reextinction trial minus last extinction trial) shows threat memory reinstatement only to the nonreminded CS+ (between dashed lines). (B) Recovery index: recovery in SCR (first trial day 3 minus last trial day 2) for CS+ minus CS−. (C) Trial-by-trial mean SCR for each stimulus during acquisition, extinction, and reextinction. *P < 0.05 (two-tailed t-test).
