Figure 6. Social memory in TPH2−/− adult mice.

(A) latency to first investigate and (B) total time spent investigating the same stranger mouse on habituation trials 1–3 and a novel stranger on dishabituation trial 4. Data are presented as mean ± standard errors of the mean and are based on 12 TPH2−/− mice (6 males and 6 females) and 12 WT controls (6 males, 6 females). The main effect of sex was not significant so data for males and females is combined. Symbols indicate significant difference between WT and TPH2−/− (* p<0.05, *** p<0.001) or between habituation trial 3 and the dishabituation trial (### p<0.001).