“…Approach-inhibition to novelty or unfamiliar situations is one temperamental characteristic that has been the focus of research because of the impact it has on children's behavioral adjustment. Individual differences in approach-inhibition emerge during the second half the of the first year of life (Goldsmith et al, 1987; Kagan, Reznick, & Snidman, 1990; Rothbart, 1988; Rothbart & Derryberry, 1981), and children continue to show variations in the ways in which they modulate their behavior when presented with unfamiliarity or novelty (Garcia-Coll, Kagan & Reznick, 1984; Kagan, 1997; Rothbart & Bates, 1998, 2006). Children who are high in inhibition, or behaviorally inhibited, are biologically predisposed to show wariness, fear, and distress when exposed to unfamiliar or novel situations, people, places, or objects (Fox, Henderson, Rubin, Calkins, & Schmidt, 2001; Garcia-Coll et al, 1984; Kagan, 1997; Kagan, Reznick, Clark, Snidman, & Garcia-Coll, 1984; Putnam & Stifter, 2005) and avoid or withdraw from novelty so as to regulate the level of their distress.…”