Figure 3. Memories are contextually linked but distinct.

a, Design for transfer of fear experiment. b, There was a significant difference in freezing (one-way ANOVA, F_2,47=4.62, p=0.01, n=18,17,15). There was no difference between freezing in contexts C and B (t₄₅=0.42, n.s.). Animals had less freezing in context A than C (t₄₇=2.46, p=0.02) and B (t₄₇=2.83, p=0.007). c, Design for extinction experiment. d, There was a significant difference in freezing during the context test (one-way ANOVA, F_2,57=12.99, p<0.0001, n=20,20,20). There was no difference between freezing in contexts C and B (t₅₇=0.80, n.s.). Animals had less freezing in context D than C (t₅₇=4.76, p<0.0001) and B (t₅₇=3.96, p=0.0002). e, There was a significant difference in freezing during the extinction test (one-way ANOVA, F_2,57=4.79, p=0.01, n=20,20,20). There were no differences in freezing between groups B and D (t₅₇=0.81, n.s.). Group C had less freezing than groups B (t₅₇=2.18, p=0.03) and D (t₅₇=2.99, p=0.004). f, Design for enhancement experiment. g, There was a significant difference in freezing (one-way ANOVA, F_2,51=9.63, p<0.001, n=14,20,20). The 5h group had more freezing than the home cage (HC) (t₅₁=3.98, p=0.0002) and 7d (t₅₁=3.45, p=0.001) groups. There was no difference between HC or 7d groups (t₅₁=0.86, n.s.). Significance: *p<0.05, **p<0.01. Results show mean +/− sem.