Investigating self-recognition in bonobos: mirror exposure reduces looking time to self but not unfamiliar conspecifics.

The interaction effect was close to significance (LRT, χ 2 = 3.61, df = 1, P = 0.057), as looking time substantially decreased after mirror exposure in the ‘ NC self ’ condition, but not in the ‘ unknown ’ condition (see Fig. 3 for model prediction means and SDs).

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