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. 2015 Mar;22(3):170–178. doi: 10.1101/lm.037028.114

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© 2015 Goode et al.; Published by Cold Spring Harbor Laboratory Press

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Figure 3. — No relapse of fear in a safe retrieval context following exposure of rats to the conditioning context (Experiment 3). (A) Extinction = mean (±SEM) percentage of freezing during the first 15 post-CS intervals (for “EXT” rats; or equivalent for “NoEXT” rats) on the first day of extinction training (“First”), and during the final 15 post-CS intervals on the last day of extinction training (“Last”). Exposure = mean (±SEM) percentage of freezing during each minute of the exposure to the conditioning context (“DANGER”) or extinction context (“SAFE”) prior to CS testing. (B) Short-term test and Long-term test = mean (±SEM) percentage of freezing during five post-CS intervals (per test) in the safe retrieval context. All rats were tested to the CS in the safe context 30 min (“Short-term test”) and 24 h (“Long-term test”) after the exposure phase. Asterisks indicate significant differences (P < 0.05) for each retention test; (n.s.) nonsignificant comparisons.