The quality of interaction between adolescents and their families has a direct association with levels of social assertiveness, social self-efficacy, and social initiative. The amount of social support received from both parents and siblings is positively associated with both higher levels of social self-efficacy during early and late adolescence (McFarlane et al., 1995), and with higher levels of social assertiveness and social initiative during late adolescence (Barber & Erickson, 2001). Barber and Erikson (2001) concluded that ongoing, quality relationships with parents and/or siblings promote the development of a healthy and confident relational/interpersonal style in adolescents. Similarly, McFarlane et al. (1995) suggest that familial social support provides a secure environment in which adolescents can develop interpersonal confidence, a necessary quality for successful adolescent peer interaction.