“…As young as 2-months of age, infants avert their gaze, smile less, and self-comfort when they encounter a suddenly still faced partner who had been communicating with them (Cohn & Tronick, 1987;Field, Vega-Lahr, Goldstein, & Scafidi, 1986;Toda & Fogel, 1993). Such findings index infants' rudimentary expectations about the nature of face to face interactions with people (see also Gusella, Muir, & Tronick, 1988;.…”