“…BI was measured in the current sample at 1 year and 2.5 years separately from the SR tasks. At 1 year, 11 social and nonsocial tasks were used from several standardized BI laboratory instruments: Stranger Approach, Unpredictable Mechanical Toy and Mask tasks from the Laboratory Temperament Assessment Battery (Lab-TAB; Goldsmith & Rothbart, 1996); three unpredictable mechanical toy tasks (a buzzing animal, an ambulance, and toy horse) adapted from Rothbart (1988); four discomfort tasks (ice, lemon, spray, and blender) from Kochanska, Coy, Tjebkes, and Husarek (1998); and the truck task adapted from Calkins, Fox, and Marshall (1996) and Fox, Henderson, Rubin, Calkins, and Schmidt (2001); for more information about the tasks, see Aktar et al (2013).…”