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. 2012 Feb;19(2):43–49. doi: 10.1101/lm.024356.111

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Figure 3. — The effect of stress on extinction retention required a post-stress incubation period. (A) Illustrates the experimental design used in this experiment. (B) Neither the SPS-1 d nor SPS-7 d rats displayed different freezing levels during conditioning or (C) extinction. (D) Extinction retention was impaired in the SPS-7 d group, but not in the SPS-1 d group. One rat was removed from the SPS-7 d group, because its mean for the extinction test was greater than two standard deviations below the group mean. (*) Main effect of stress.