Figure 4
From: Physical Interaction Is Required in Social Buffering Induced by a Familiar Conspecific

Tone cue presentation (CS+) induced freezing response of mice effectively.
During presentation, subjects in social group (S) showed significant lower freezing percentage than odor+ group (O+) and odor− group (O−). But there was no difference between three groups without tone cue (CS−). *p < 0.05, **p < 0.01, ***p < 0.001, &0.05 < p < 0.1.