Alcohol and Marijuana use in Undergraduate Males: Between- and Within-Person Associations with Interpersonal Conflict

Do couple drinking episodes lead to intimate partner aggression? An ecological momentary assessment study of same-sex and mixed-sex couples

OBJECTIVE

Alcohol use is an established risk factor for intimate partner aggression (IPA); however, few studies have considered whether couple drinking episodes increase the short-term likelihood of IPA episodes. The present ecological momentary assessment study considered the temporal effects of alcohol consumption on IPA perpetration and victimization within a sample of community couples at elevated risk of aggression.

METHOD

Mixed-sex (n = 191), same-sex male (n = 31), and same-sex female (n = 27) cohabiting couples (total N = 249; ages 21-35) made three independent, random reports for 30 consecutive days. Dyadic multilevel modeling was used to examine the impact of each partner's drinking episodes on the occurrence of verbal and physical perpetration and victimization events within the next 4 hr, using the actor-partner interdependence model.

RESULTS

Actor and partner alcohol use increased the likelihood of conflict and likelihood of conflicts involving verbal perpetration and victimization within the next 4 hr; alcohol effects on physical aggression were weaker. Actor alcohol effects on IPA remained significant after the addition of several control variables; partner effects did not. The absence of Alcohol × Gender interaction effects suggests that alcohol effects on IPA do not depend on actor or partner gender or their combination.

CONCLUSIONS

There are robust alcohol effects on the occurrence of verbal aggression perpetration and victimization episodes, with weak effects on physical aggression perpetration. Conflicts that include alcohol are not more likely to include aggression; rather, alcohol increases the likelihood of conflict occurring, with a proportion of those involving verbal aggression. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

It's not just drinking, but where you drink: A daily diary study of drinking venue effects on sexual activity with new partners

It is well established that young adults' drinking is positively associated with sexual activity with new partners. While pharmacologic effects of alcohol (e.g., impaired sexual decision-making) can contribute to sexual activity with new partners, the context in which alcohol is consumed may also be important. We tested the hypothesis that drinking venues such as parties and bars increase the likelihood of sexual activity with new partners beyond any pharmacological effects of drinking quantity. Participants were 427 first-year men (aged 18-19). They reported on their relationship status and sociosexuality (i.e., attitudes/behaviors related to casual sex) at baseline and completed daily diary reports of drinking events (including number of drinks and venue) and sexual activity with new or previous partners over the span of 56 days. Drinking events at parties/bars (but not at home) increased the odds of sexual activity in the next four hours with new partners (but not with previous partners), even after controlling for the number of drinks consumed. Parties/bars are an integral part of facilitating sexual activity with new partners, and have effects independent of pharmacological alcohol effects, which has implications for reducing alcohol-related risky sexual activity. Interventions should not only target alcohol consumption, but where consumption takes place.

Elixir of love or venom of violence: When does a drinking event result in couple intimacy or couple conflict?

The short-term consequences of drinking events may be positive or negative. Most studies have considered only one outcome, but people may experience different alcohol outcomes on different occasions, depending on the circumstances. The present study sought to identify predictors of drinking events that resulted in couple intimacy, conflict, or neither outcome using existing data from a 30-day ecological momentary assessment (EMA) study. Participants were a community sample of partnered, moderately drinking adults with a recent history of verbal or physical partner aggression (N = 249 couples). They provided reports of drinking events, intimacy and conflict events, and ratings of relationship harmony and discord in three randomly signaled reports each day. Mixed-effects multinomial analyses were used to compare predictors of drinking events that, within three hours, resulted in intimacy, conflict, or neither outcome. Consistent with previous research, characteristics of the drinker (individual tendencies to experience intimacy or conflict) and characteristics of the drinking event (alcohol quantity, drinking companions) both predicted drinking outcomes. Moreover, the pre-drinking relationship context predicted post-drinking relationship outcomes, consistent with the idea that alcohol focuses attention on salient contextual cues. Specifically, greater pre-drinking relationship harmony predicted greater likelihood of experiencing intimacy after drinking, whereas greater pre-drinking relationship discord predicted greater likelihood of experiencing conflict after drinking. In summary, characteristics of the drinker, the drinking event, and the pre-drinking relationship context contribute to the likelihood that a given drinking event will have short-term positive or negative relationship outcomes.

Simultaneous Alcohol and Marijuana Use Among Young Adults: A Scoping Review of Prevalence, Patterns, Psychosocial Correlates, and Consequences

BACKGROUND

Alcohol and marijuana are commonly used by young adults, and use of both substances, particularly at the same time, is prevalent among this population. Understanding the prevalence, patterns, correlates, and consequences of simultaneous alcohol and marijuana (SAM) use is important to inform interventions. However, this literature is complicated by myriad terms used to describe SAM use, including use with overlapping effects and same-day co-use.

OBJECTIVES

This scoping review identifies and describes the peer-reviewed literature focused on SAM use by young adults and distinguishes simultaneous use from same-day co-use of alcohol and marijuana. This review also provides a narrative summary of the prevalence of SAM use, patterns of SAM and other substance use, psychosocial correlates, and consequences of SAM use.

ELIGIBILITY CRITERIA

This review is limited to papers written in English and published in peer-reviewed journals between January 2000 and August 2021. It includes papers assessing simultaneous use or same-day co-use of alcohol and marijuana among young adults ages 18 to 30. Review papers, qualitative interviews, experimental lab studies, policy work, toxicology or medical reports, and papers focused on neurological outcomes are excluded.

SOURCES OF EVIDENCE

PubMed, PsycINFO, and Web of Science databases were searched. Databases were selected and the search strategy developed in consultation with an information specialist.

CHARTING METHODS

A data charting form was utilized to specify which information would be extracted from included papers. Eight categories of data were extracted: (1) research questions and hypotheses; (2) sample characteristics; (3) study procedures; (4) definition of SAM use; (5) prevalence of SAM use; (6) patterns of SAM and other substance use; (7) psychosocial correlates of SAM use; and (8) consequences of SAM use.

RESULTS

A total of 1,282 papers were identified through initial search terms. Through double-blind title/abstract screening and full-text review, the review was narrowed to 74 papers that met review inclusion criteria. Review of these papers demonstrated that SAM use was prevalent among young adults, particularly among those who reported heavier quantities and more frequent use of alcohol and marijuana. Enhancement-related motives for use were consistently positively associated with SAM use. SAM use was associated with greater perceived positive and negative consequences of alcohol and/or marijuana use. Inconsistencies in prevalence, patterns, correlates, and consequences were found between studies, which may be due to large variations in measurement of SAM use, populations studied, methodological design (e.g., cross-sectional vs. intensive longitudinal), and the covariates included in models.

CONCLUSIONS

The literature on simultaneous use and same-day co-use of alcohol and marijuana has expanded rapidly. Of the 74 included papers (61 on SAM use; 13 on same-day co-use), 60 papers (47 on SAM use; 13 on same-day co-use) were published within the last 5 years. Future research focusing on the ways in which SAM use confers acute risk, above and beyond the risks associated with separate consumption of alcohol and marijuana, is needed for understanding potential targets for intervention.

Sociosexuality and Sex With New Partners: Indirect Effects Via Drinking at Parties and Bars

OBJECTIVE

The desire for many novel, concurrent, uncommitted sex partners (i.e., unrestricted sociosexuality) may encourage individuals to seek out contexts that facilitate casual sex. We tested a model in which the effects of sociosexuality on sex with new partners were mediated via drinking in specific contexts. We hypothesized that drinking at parties and bars, which are known to facilitate casual sex (but not drinking at home), would contribute to sex with new (but not with previous) partners.

METHOD

Participants were 427 male freshmen from a large, public northeastern university. They completed a baseline survey in their first semester followed by 56 days of daily reports on drinking and sexual activity during their second semester.

RESULTS

As predicted, sociosexuality measured at baseline positively predicted occasions of sex with a new partner, but not sex with a previous partner. In support of the model, effects were partially mediated by frequency of drinking at parties and bars across the 56-day reporting period, but not by drinking at home.

CONCLUSIONS

Previous research has demonstrated associations among sociosexuality, drinking, and casual sex. Our study is unique in suggesting that drinking in specific contexts--that is, drinking at parties and bars, but not drinking at home--partially mediates the effects of sociosexuality on sex with new partners. This pathway suggests that men with a desire for many novel, concurrent, uncommitted sex partners seek out drinking contexts as a way of facilitating these encounters.

Sociosexuality and Sex With New Partners: Indirect Effects Via Drinking at Parties and Bars

OBJECTIVE

The desire for many novel, concurrent, uncommitted sex partners (i.e., unrestricted sociosexuality) may encourage individuals to seek out contexts that facilitate casual sex. We tested a model in which the effects of sociosexuality on sex with new partners were mediated via drinking in specific contexts. We hypothesized that drinking at parties and bars, which are known to facilitate casual sex (but not drinking at home), would contribute to sex with new (but not with previous) partners.

METHOD

Participants were 427 male freshmen from a large, public northeastern university. They completed a baseline survey in their first semester followed by 56 days of daily reports on drinking and sexual activity during their second semester.

RESULTS

As predicted, sociosexuality measured at baseline positively predicted occasions of sex with a new partner, but not sex with a previous partner. In support of the model, effects were partially mediated by frequency of drinking at parties and bars across the 56-day reporting period, but not by drinking at home.

CONCLUSIONS

Previous research has demonstrated associations among sociosexuality, drinking, and casual sex. Our study is unique in suggesting that drinking in specific contexts--that is, drinking at parties and bars, but not drinking at home--partially mediates the effects of sociosexuality on sex with new partners. This pathway suggests that men with a desire for many novel, concurrent, uncommitted sex partners seek out drinking contexts as a way of facilitating these encounters.

Daily patterns of substance use and violence among a high-risk urban emerging adult sample: Results from the Flint Youth Injury Study

OBJECTIVE

Interpersonal violence is a significant public health problem, with substance use a key risk factor. Intensive longitudinal methods (ILMs) provide data on daily patterns/relationships between substance use and violence, informing prevention. Prior daily research has not focused on these relationships among urban minority samples.

METHODS

Within an RCT comparing ILM assessment/schedule methods, 162-participants completed daily IVR (n = 81) or SMS (n = 81) assessments measuring 19 substance use and violence (partner/non-partner) behaviors daily for 90-days. GLMMs characterized between- and within-person predictors of daily violence.

RESULTS

Participants [48.7%-female; age = 24.4; 62.3%-African-American; 66.7%-public assistance] completed an average of 46.5 daily reports [SD = 26.7]. Across 90-days, alcohol was characterized by episodic weekend use (average = 10 days-of-use, 34.4% drinking-days involved binge-drinking), while marijuana use was continuous (average = 27 days-of-use; 1.7 times/day), with no weekend differences. Among 118-violent conflicts, 52.5% occurred on weekends; 57.6% were with non-partners/peers; 61.0% involved perpetration/57.6% victimization; and 52.5% involved severe violence. For violence conflicts, 27.1% were preceded by alcohol/22.9% preceded by drug use. Between-person predictors of daily violence included retaliatory attitudes (AOR = 3.2) and anxiety (AOR = 1.1). Within-person predictors included weekends (AOR = 1.6), binge drinking (AOR = 1.9), non-medical prescription opioid use (AOR = 3.5) and illicit drug use (AOR = 8.1).

CONCLUSION

Among a high-risk urban minority sample, we found that higher baseline retaliatory attitudes and anxiety, as well as same-day binge drinking, non-medical prescription opioid use, and illicit drug use were associated with daily violence, likely reflecting both pharmacological and socio-contextual factors. Addressing substance use and retaliatory violence with tailored prevention efforts may aid in decreasing negative interpersonal violence outcomes.