A growing body of work links posttraumatic stress disorder (PTSD) symptoms and substance use. Unfortunately, much of the literature has examined associations in isolation (e.g., alcohol only). Failure to account for simultaneous or concurrent substance use may limit conclusions that can be drawn from existing research, including the extent to which specific substances contribute differentially to PTSD symptom patterns. The current study examined differences in PTSD symptom profiles between individuals using one or both of the most commonly co-administered psychoactive substances-alcohol and marijuana. Trauma-exposed participants (N = 533; Mage = 21.15) comprised two mutually-exclusive groups: past-month alcohol-only use (n = 334) or past-month alcohol and marijuana use (n = 199). Clusterlevel and symptom-level profile analyses evaluated mean differences and shape (parallelism) of PTSD symptom severity profiles between the groups. Follow-up analyses examined symptom-specific difference in PTSD symptom endorsement and severity. Overall, individuals using marijuana and alcohol evidenced greater PTSD negative cognition (30.8% greater) and hyperarousal (26.4% greater) symptom severity. Alcohol and marijuana users were more likely to endorse, and report greater severity of, mood-related PTSD negative cognition symptoms (e.g., anhedonia, negative affect) and externalizing hyperarousal symptom (e.g., irritability/aggression, risky behaviors) than alcohol-only users. Findings highlight important PTSD differences between individuals that are often lumped into homogenous categories of isolated substance users. Findings provide preliminary support for an 'additive' self-medication model between PTSD and polysubstance use. Lastly, findings indicate that mood-related negative cognition symptoms and externalizing hyperarousal symptoms may be important targets for PTSD-polysubstance use intervention.
The current study examined perceived control over anxiety as a moderator in the relationship between AS and (1) alcohol use frequency and (2) binge drinking frequency among 80 community-recruited adolescents (M = 15.40; 40% female). Eighty-five percent of adolescents reported consuming an alcohol beverage, while 39.5% reported binge drinking. Results indicated significant interactions between AS and perceived control. More specifically, when perceived control was low, higher anxiety sensitivity was related to increased frequency of alcohol use days, but not with binge drinking days. Alternatively, when perceived control over anxiety was high, elevated anxiety sensitivity was associated with a decreased in binge drinking days, but not with alcohol use days. Findings suggest that influence of perceived control over anxiety may be another important, malleable factor that should be considered in future etiological and intervention-oriented work targeting anxiety sensitivity and alcohol misuse among adolescence.
Heavy drinking and sexual assault warrant significant concern on U.S. college campuses as emerging evidence suggests that the risk for sexual victimization is amplified in the context of high-risk drinking behavior. Despite recent attention to sexual assault (e.g., MeToo Movement), rates of perpetration remain largely unchanged. In applying the bystander intervention framework, our understanding of the relation between key factors that may facilitate or prevent behavioral action, or when and how these factors are most salient, is limited. The present study examined whether bystander attitudes and bystander self-efficacy interact to predict bystander intent to intervene. Hypotheses were tested among college student drinking gamers, a group at particular risk for involvement in situations of sexual violence. Participants (N = 964) were traditional college-aged student drinking gamers recruited from three universities across the East and Southern Central United States. After controlling for Greek affiliation, prior intervention training and social desirability, hypotheses were partially supported. Higher rape supportive attitudes (rape myth acceptance) were negatively associated with bystander intent to intervene across all participants, but bystander self-efficacy significantly moderated the relation between bystander attitudes (rape myth acceptance) and bystander intent to intervene only among women college student drinking gamers. The interaction effect was not significant among men. For all participants, there was a significant relation between bystander self-efficacy and bystander intent to intervene such that as self-efficacy increases, bystander intent to intervene increases. The discussion addresses implications for sexual assault prevention programs on college campuses and directions for future research.
Objective: Evidence suggests that social anxiety (SA) is a risk factor for problematic alcohol and cannabis use, particularly during states of social stress. Unfortunately, laboratory studies to date have overlooked decisionmaking mechanisms (e.g., use willingness) and contextual features of commonly used social stress tasks that may clarify what is driving these links. The current study begins to address this gap by testing the effects of SA and laboratory-induced peer rejection on acute alcohol and cannabis use willingness within a simulated party setting. Method: 80 emerging adults (18-25 years; 70% women) endorsing lifetime alcohol and cannabis use were randomly assigned to experience rejection or neutral social cues. They rated their willingness to use alcohol and cannabis before and after cue exposure within the simulated party. A hierarchical regression tested the main and interaction effects of SA symptoms and experimental condition (Rejection vs. Neutral) on alcohol and cannabis use willingness, controlling for past-year use frequency and willingness to accept any offers (e.g., food and nonalcoholic drinks). Results: There were statistically significant main (but not interaction) effects of SA and experimental condition on cannabis use willingness. Higher SA and Rejection exposure were each associated with greater cannabis use willingness. There were neither main nor interaction effects on alcohol willingness. Conclusions: Results suggest that elevated SA increases cannabis use willingness across social contexts, regardless of Rejection exposure, while Rejection exposure increases use willingness similarly across levels of SA. Together, findings reinforce the need to consider social-contextual factors and polysubstance use in laboratory settings. Public Health Significance StatementSubstance use often occurs in social settings where multiple substances are available; because socially anxious individuals are hypersensitive to social cues, this study reinforces the need to carefully model individual-and context-level interactions on substance use risk in laboratory-based designs. Specifically, findings suggest that in social settings where both alcohol and cannabis are available, experiencing rejection increases vulnerability for cannabis use, but not alcohol use. Findings also suggest that young adults with elevated social anxiety (SA) are more willing to use cannabis in social situations, even without experiencing rejection or elevated anxiety symptoms.
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