Fig. 3. Fear conditioned behaviors.

Line graph represents the mean duration of freezing of wildtype (n = 6), SERT^+/− (n = 12) and SERT^−/− (n = 8) rats during a presentation of an acoustic tone on the following days: (a) acquisition of conditioning with 5 tones followed by 5 mild shocks on day 1; (b) evidence of consolidation on day 2 with initial tone and no shock and extinction learning with subsequent tones and no shock. Asterisks(*) and hastag(#) indicates significant between subjects effects with a Fishers LSD posthoc test or within subject differences over time with a Dunnett’s test (versus tone one, baseline) protected by a repeated measures one way ANOVA. Error bars represent the SEM