“…The authors regard a shy or sociable response style with strangers, whether peers or adults, as only one feature of two broader temperamental categories called inhibited and uninhibited to the unfamiliar (DiLalla, Kagan, & Reznick, 1994;Kagan, Reznick, & Gibbons, 1989;Kagan, Reznick, & Snidman, 1988). Inhibited children react to unfamiliar incentives with an initial avoidance, distress, or subdued emotion when they reach the age when discrepancy elicits uncertainty, usually by 9-12 months.…”