“…Although children's social skills markedly increase during the years in question (Berger, 2011;Matthews, Deary, & Ehiteman, 2009), they may superficially be expected to protect older children against depression. Moreover, as children become increasingly autonomous from their parents and place increasing importance on peer groups from preschool to first grade (Buysse, Goldman, West, & Hollingsworth, 2008;Quinn & Hennessy, 2010), social skills may constitute a more important protective factor against depression in first grade than in preschool, thus rendering a larger proportion of first-grade children vulnerable to depression. This vulnerability may be especially important because school-age children are expected to face increasing social demands by forming new peer and teacher relationships, both of which have been found to predict emotional problems (Arbeau, Coplan, & Weeks, 2010;Hamre & Pianta, 2005;Hay, Payne, & Chadwick, 2004).…”