As sated above, youth who demonstrate curiousity about trying substances soon are more likely to start using substances during adolescence (Choi et al., 2001; Nodora et al., 2014; Strong et al., 2015). Thus, the ABCD substance use module includes a 9-item instrument to measure the extent to which substance-naïve youth are likely to start using alcohol, cannabis, or nicotine. The three nicotine items were used from the Population Assessment of Tobacco and Health (PATH) Study (Hyland et al., 2016), which expanded Pierce’s (Pierce et al., 1996) well-established measure of cigarette susceptibility to other tobacco products in youth and adults (ages 12 and older). The ABCD Study Substance Use workgroup also added questions of the same format for alcohol and cannabis to assess potential risk for initiating use across each of these primary categories of substance exploration in this age group. For each substance, respondents answer three questions to indicate the extent to which they are curious about the substance, will try the substance soon, and would use the substance if it were offered by a friend. The item responses appear
