“…More frequent communication is associated with higher rates, more positive attitudes towards and lower self-efficacy to refuse cigarette use (de Leeuw et al, 2008(de Leeuw et al, , 2010Harakeh, Scholte, de Vries, & Engels, 2005, Harakeh, Engels, Den Exter Blokland, Scholte, & Vermulst, 2009Harakeh et al, 2010;Hiemstra, Otten, & Engels, 2012;Huver, Engels, & de Vries, 2006; Otten, van der Zwaluw, van der Vorst, & Engels, 2008); higher rates of alcohol use and associated problems (van den Eijnden, van de Mheen, Vet, & Vermulst, 2011;Koning et al, 2013;Spijkerman, van den Eijnden, & Huiberts, 2008;van der Vorst et al, 2005van der Vorst et al, , 2010; and higher rates of cannabis use initiation (Nonnemaker et al, 2012). It is unclear as to the direction of this relationship: parents' frequent communication may be ignored and adolescents start using substances; or parents communicate more frequently when they believe their adolescents are using substances.…”