“…(Hampson, Andrews, Severson, & Barckley, 2015) A study of youth susceptible to e-cigarettes suggested that psychological problems, rebelliousness, other substance use, and household exposure to smoking are determinants of e-cigarette use susceptibility. (Kwon, Seo, Lin, & Chen, 2018) Additionally, studies have documented similarities and differences in risk factors associated with e-cigarette and cigarette use. (Barrington-Trimis et al, 2015;Wills, Knight, Williams, Pagano, & Sargent, 2015) E-cigarette use and cigarette smoking may be associated with similar psychosocial factors such as: use among friends, use among people at home, friends' attitudes, sensation seeking, substance use, and internalizing/externalizing behaviors; (Barrington-Trimis et al, 2015;Wills et al, 2015) however, both e-cigarette and cigarette single product users may have fewer risk factors compared to those who report using both products (i.e., dual users).…”