“…the participant's personal characteristics, family, school, peer and neighborhood factors. Such a pathway of accumulation of multiple risks has been tested in several studies with community-sample or referred subjects, demonstrating a significant linear relation between the cumulative risk index, computed by summing the number of dichotomized risk factors such as high vs. low IQ, secure vs. insecure attachment, or good vs. poor parenting for example, and children's or adolescents' externalizing or internalizing behavior (Appleyard, Egeland, van Dulmen, & Sroufe, 2005;Atzaba-Poria, Pike, & Deater-Deckard, 2004;Gerard & Buehler, 2004;Greenberg et al, 2001;Lanza, Rhodes, Nix, & Greenberg, 2010;Lucio, Rapp-Paglicci, & Rowe, 2011;Roskam, Meunier, Stievenart, & Noël, 2013;Trentacosta et al, 2008). Some of these studies were cross-sectional like the present one, and therefore unable to address the core question of the directionality of the effects (e.g., Atzaba-Poria et al, 2004;Greenberg et al, 2001).…”