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Yawn Contagion and Empathy in Homo sapiens

Figure 2

Bar graph of contagion frequency (mean±SE) for dyads of non-stranger subjects (social bond: 1-3).

Mean±SE, 95% CI for each category: Bond = 1: 0.386±0.058, 0.267/0.505; Bond = 2: 0.519±0.080, 0.356/0.682; Bond = 3: 0.850±0.064, 0.720/0.979. LMM (AICc = 0.007, n = 48). Social bond categories: 1 = acquaintances; 2 = friends; 3 = kin with r≥0.25 and life partners).

Figure 2

doi: https://doi.org/10.1371/journal.pone.0028472.g002