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2016 Summer. ; Includes bibliographical references. ; In 2014, marijuana became legal for recreational use for adults 21 and older in Colorado (Colorado Const. art XVIII § 16., 2012). There are potential health risks related to marijuana dependence, which are more prominent in adolescent users (Volkow, Baler, Compton, & Weiss, 2014). Medical marijuana legalization has not been shown to increase marijuana use or prevalence of dependence (Cerdá, Wall, Keyes, Galea, & Hasin, 2012). Changes related to legalization may include increased availability and social acceptance, as well as decreased price and perceived harm of use (Hopfer, 2014). There also may be increased interest in moving to Colorado related to the changes in marijuana laws (United States Census Bureau, 2015; Institutional Research & Analysis, 2014). The facets of sensation seeking, risk seeking and experience seeking, influence marijuana use (Zuckerman, 2007; Conner & Henson, 2011). Sexual orientation has a quadratic relation to marijuana use (Ford & Jasinski, 2006). Use among bisexuals is higher than use at either end of the spectrum (Eisenberg & Wechsler, 2003). Based on these findings, several hypotheses were made. First, marijuana use would increase in college students after legalization, however just for those 21 and older. Next, risk seeking and experience seeking would both uniquely moderate marijuana use before and after legalization and in underage and of-age students. Third, sexual orientation would have a quadratic relation with marijuana use. Finally, the relation between the influence of marijuana leglislation on non-residents decisions to attend a Colorado college and marijuana use was examined. Data was collected from undergraduate students (N = 5241) at a Colorado university. Participants were assessed for marijuana use behavior, sensation seeking, sexual orientation, and influence of marijuana laws on non-resident decision to attend Colorado schools. Pearson's Chi-square, analysis of variance, negative binomial regressions, and polyserial correlations were used to test the hypotheses. Results indicated that marijuana use has increased since legalization for all students, but moreso for those over 21 (p < .001). No differences in frequency of past month use was found between pre and post legalization (p = .615). Regression analysis found experience seeking to be a significant predictor of past 30 day use (p <.05). Additionally, risk seeking predicted use for those under 21 (p <.01). A quadratic relation was found between sexual orientation and past month use, where use increased at a decreasing rate from the homosexual end of the spectrum to the heterosexual end (p <.01). Correlations were found between degree of marijuana law influence and both past 30 and lifetime use among non-resident college students (ρ = 0.29, p < .001; ρ = 0.17, p < .001). Overall, legalization, experience seeking, underage risk seeking, sexual orientation, and legislation influence on decision making all predicted marijuana use. These findings may help inform other states considering legalization of potential outcomes and groups at higher risk of marijuana use. Future research should examine longer term effects of legalization, as well as effective interventions.

Objective Cannabis use can result in negative cannabis-related consequences (NCRC), particularly among individuals high in impulsivity and sensation seeking. Continued research is necessary to determine if these associations generalize to community adults with daily legal cannabis use. We hypothesized that impulsivity and sensation seeking would positively predict NCRC. Method Community adults ( N = 51) participated in a study measuring personality, cannabis use, and related outcomes, as part of a larger study. Two multiple regression models predicting NCRC were conducted: one for impulsivity facets and one for sensation seeking facets. Results Positive urgency was significantly negatively associated with NCRC. Risk seeking was significantly positively associated with NCRC. All other personality facets were not significantly associated with NCRC. Conclusions Associations between some personality facets and NCRC may differ among adults with daily legal cannabis use. Future research should continue to explore unique personality associations related to NCRC among individuals with daily use.

This study examined marijuana-use motives and protective behavioral strategies (PBS) as within- and between-subject predictors of marijuana-related outcomes. Furthermore, we explored differences between a specific marijuana-related event (i.e., 4/20) compared with typical weekend/weekday use. Forty-three college student marijuana users (31 females) completed daily surveys for 12 days (April 15–April 26, 2016). Four motives (coping, conformity, enhancement, and social) were associated with more negative consequences within-subjects. Enhancement and conformity motives were also associated with a higher number of use sessions, and expansion motives were associated with higher subjective high. Marijuana PBS use (total score) was associated with fewer sessions and lower subjective high within-subjects. Social motives were higher, whereas PBS use and coping motives were lower on 4/20 compared with other days. Our findings support PBS and certain use motives as promising intervention targets for college student marijuana users.