Figure 5. DKO mice exhibit decreased social approach behavior in a three-chamber social behavior assay.
(a) Social index (calculated as: time spent near cage with novel mouse / [time spent near cage with novel mouse + time spent near empty cage] *100) was decreased in DKOs. Thus, a social index <50 indicates a social aversion, while >50 indicates a preference for social affiliation. (b) DKOs spent significantly less time in the social zone and significantly more time in the center (home) zone. (Data expressed as mean ± SEM; **p<0.01, ***p<0.001)