“…Healthy peer relationships are vital for the positive development of students' cognitive, emotional, and social skills (Ladd, 2005;Martín-Antón, Monjas, García Bacete, & Jiménez, 2016;Merrell & Gueldner, 2010;Rose-Krasnor & Denham, 2009), as well as their scholastic adaptation (Gifford-Smith & Brownell, 2003). In early adolescence, peer group integration is a key feature for maintaining a healthy developmental trajectory (Cillessen & Mayeux, 2004;Engels et al, 2016;Hartup, 1989;Hay, Caplan, & Nash, 2009;Martín-Antón et al, 2016).…”