“…In addition to gender and social competence, contextual factors influence children's social behaviors, ranging from helping (e.g., Gillies, 2000) to aggression (e.g., DeRosier, Cillessen, Coie, & Dodge, 1994; Dodge, Coie, Pettit, & Price, 1990). Specific variables that influence children's social behavior are group size (Benenson, Nicholson, Waite, Roy, & Simpson, 2001), familiarity of group members (Asher, 1983; Brachfeld‐Child & Schiavo, 1990; Cillessen, 1997; Coie & Kupersmidt, 1983), and group gender composition (Hartup, 1996).…”