Results of egocentric social network analysis indicated that high school-aged youth nominated significantly more adults than middle school-aged youth. 
egocentric social network analysis
Broadening the perspective on youth's systems of support: An ecological examination of supportive peer and adult relationships during adolescence.This study applies the theory of positive youth development (Lerner et al., 2010) and the youth systems framework (Varga & Zaff, 2018) to the examination of supportive peer and adult relationships across multiple contexts in which youth develop. 
youth systems framework
Broadening the perspective on youth's systems of support: An ecological examination of supportive peer and adult relationships during adolescence.This study applies the theory of positive youth development (Lerner et al., 2010) and the youth systems framework (Varga & Zaff, 2018) to the examination of supportive peer and adult relationships across multiple contexts in which youth develop. 
positive youth development