“…These tendencies remain present through middle childhood and early adolescence (e.g., Neal, 2010), and longitudinal research has demonstrated that children are more likely to become friends with same-sex peers (Tuma & Hallinan, 1979). Children also tend to form relationships with others who are similar on a range of behavioral characteristics (Gifford-Smith & Brownell, 2003), including academic orientation (e.g., Kindermann, 2007; Ryan, 2001; Tuma & Hallinan, 1979) and athleticism (e.g., Crockett, Losoff, & Peterson, 1984; Seagoe, 1933), which provide opportunities for children to form relationships. Academic grouping may bring children with similar academic orientations into contact, while similarly athletic children may have opportunities to interact through sports participation (Cairns & Cairns, 1994).…”