“…These age findings are in accordance with early childhood literature indicating that older children demonstrate greater skills in social, cognitive, and motor domains as a function of developmental maturation (Rothbart, Sheese, & Posner, 2007;Zelazo, 2000) and as a function of greater exposure to learning within the classroom context (NICHD Early Child Care Research Network, 2001). Sex differences in preschool also have been documented in the literature, with girls consistently demonstrating higher regulated behavior, language ability and social competence relative to boys (Bulotsky-Shearer, Domínguez, et al, 2010;Coolahan, Fantuzzo, Mendez, & McDermott, 2000;Ponitz et al, 2008;Qi, Kaiser, & Milan, 2006;Stowe, Arnold, & Ortiz, 2000).…”