Ten-year-old maria finds that her 6-month-old sister anna will smile when maria smiles and laugh when maria laughs. anna's imitation of maria's facial expressions is an example of automatic mimicry.
Automatic mimicry is understood as our tendency to unconsciously imitate others' expressions, postures, and voice tones. It is a form of conformity. It is the unconscious or automatic imitation of speech and movements, gestures, facial expressions and eye gaze as well.
This may be considered a neurocognitive model of emotional contagion.