Protective behavioral strategies mediate the relationship between behavioral economic risk factors and alcohol-related problems

Longitudinal examination of alcohol demand and alcohol-related reinforcement as predictors of heavy drinking and adverse alcohol consequences in emerging adults

BACKGROUND AND AIMS

Behavioral economic theory predicts that high alcohol demand and high proportionate alcohol-related reinforcement are important determinants of risky alcohol use in emerging adults, but the majority of research to date has been cross-sectional in nature. The present study investigated prospective and dynamic relationships between alcohol demand and proportionate alcohol-related reinforcement in relation to heavy drinking days and alcohol problems.

DESIGN

Longitudinal cohort with assessments every 4 months for 20 months.

SETTING

Ontario, Canada.

PARTICIPANTS

Emerging adults reporting regular heavy episodic drinking (n = 636, Mage = 21.44; 55.8% female).

MEASUREMENTS

Heavy drinking days (HDD; Daily Drinking Questionnaire), alcohol problems (Brief Young Adult Alcohol Consequences Questionnaire), alcohol demand (Alcohol Purchase Task) and proportionate alcohol-related reinforcement (Activity Level Questionnaire).

FINDINGS

Linear mixed effects models revealed that behavioral economic indicators and alcohol-related outcomes significantly decreased over the study, consistent with 'aging out' of risky alcohol use. Random intercept cross-lagged panel models revealed significant between-person relationships, such that higher alcohol demand and alcohol-related reinforcement were positively associated with HDD and alcohol problems (random intercepts = 0.187-0.534, Ps < 0.01). Moreover, alcohol demand indicators (particularly the rate of change in elasticity of the demand curve, as measured by α, and the maximum expenditure, Omax) and proportionate alcohol-related reinforcement significantly forecasted changes in HDD at all time points (|βs| = 0.063-0.103, Ps < 0.05) in cross-lagged relationships, with bidirectional associations noted for the rate of change in elasticity (βs = -0.085 to -0.104, Ps < 0.01). Proportionate alcohol-related reinforcement also significantly forecasted changes in alcohol problems at all time points (βs = 0.072-0.112, Ps < 0.01).

CONCLUSIONS

Multiple behavioral economic indicators (demand elasticity, maximum expenditure and reinforcement ratio) forecast changes in heavy episodic drinking and alcohol problems over the course of emerging adulthood. These results further implicate alcohol demand and proportionate alcohol-related reinforcement as etiologically and developmentally important mechanisms in alcohol use trajectories.

Correlates of college student use of protective behavioral strategies when drinking alcohol

Objective: The present study identified student characteristics associated with using protective behavioral strategies (PBS) to reduce harms when consuming alcohol. Participants: 224 college students who drink alcohol (66.5% female, 89.7% White non-Hispanic, Mage = 21.04) completed an anonymous study survey. Methods: Participants reported use of three PBSs: serious harm reduction; stopping or limiting drinking; and manner of drinking. They also reported sensation seeking, romantic involvement, parent-student alcohol communication, and attitudes toward alcohol in college life. Results: Attitudes toward alcohol in college life, Greek life participation, and sensation seeking were the variables most consistently associated with PBS use. Perceiving alcohol as an important part of college and sensation seeking were associated with less PBS use, but Greek life participation was associated with greater PBS use. Conclusions: Specific resources may be needed to encourage PBS use among high sensation seeking students and those who believe alcohol is a part of college life.

Harm Reduction Strategies among University Students Who Use Alcohol and Cannabis, and Related Psychological Variables: A Systematic Review

This systematic review identifies the psychological variables associated with the use of harm reduction strategies (HRS) among university students who use alcohol or cannabis. The reviewed studies are categorized according to the psychological variables studied and the different analytic approaches used (direct effects, mediation, and moderation). Among the empirical peer-reviewed studies identified (n = 76), most (94.7%) were cross-sectional studies conducted in the US (90.8%) with samples of alcohol-using university students (86.8%). Five categories were identified: mental health, motives/expectancies, personality, social cognition, and self-efficacy. The most studied constructs were motives, anxiety and depression, impulsivity, and social norms. Most studies conducted mediation or moderation analyses including psychological variables, HRS and alcohol outcomes. Social, enhancement and coping motives, impulsivity, and social norms of alcohol use were associated with lower use of HRS, which, in turn, was associated with a higher number of alcohol/cannabis outcomes. The results of moderation studies consistently suggest that HRS use was more protective for students with poor mental health, high impulsivity, and low self-regulation. The synthesis of evidence provided in this review could be useful for guiding future research and informing the design of interventions aimed at promoting the use of HRS among university students who use alcohol and/or cannabis.

Mechanisms of Behavior Change in Substance Use Disorder With and Without Formal Treatment

This article provides a narrative review of studies that examined mechanisms of behavior change in substance use disorder. Several mechanisms have some support, including self-efficacy, craving, protective behavioral strategies, and increasing substance-free rewards, whereas others have minimal support (e.g., motivation, identity). The review provides recommendations for expanding the research agenda for studying mechanisms of change, including designs to manipulate putative change mechanisms, measurement approaches that expand the temporal units of analysis during change efforts, more studies of change outside of treatment, and analytic approaches that move beyond mediation tests. The dominant causal inference approach that focuses on treatment and individuals as change agents could be expanded to include a molar behavioral approach that focuses on patterns of behavior in temporally extended environmental contexts. Molar behavioral approaches may advance understanding of how recovery from substance use disorder is influenced by broader contextual features, community-level variables, and social determinants of health. Expected final online publication date for the Annual Review of Clinical Psychology, Volume 18 is May 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Social Network Drinking Feedback is Associated with Use of Protective Behavioral Strategies and Drinking-Related Outcomes in Emerging Adult Risky Drinkers

OBJECTIVE

Although emerging adult risky drinkers are generally unmotivated to change their drinking, use of protective behavioral strategies (PBS) to minimize drinking risks is associated with decreased alcohol-related harms. However, research on social influences on PBS use and associations with drinking outcomes is limited and relevant to informing interventions for this priority population. This study investigated whether emerging adults' drinking-related behaviors were associated with social network encouragement, discouragement, or mixed messages about their drinking and with PBS use.

METHOD

Risky drinkers ages 21-29 years (N = 356; 228 women; mean age = 23.6 years) were recruited from the community using digitally implemented respondent-driven sampling. A web-based survey assessed social network drinking feedback, PBS use, drinking practices and problems, and behavioral allocation of time and money to drinking.

RESULTS

Negative binomial generalized linear models indicated that friend and spouse/ partner discouragement of drinking was associated with greater PBS use, whereas mixed messages were associated with lower use (ps < .05). Greater PBS use was associated with fewer alcohol-related negative consequences and lower behavioral allocation to drinking (ps < .05); the latter association was most consistent for serious harm reduction PBS (e.g., use of a designated driver). Mixed drinking messages from all relationship types had direct negative associations with drinking outcomes, particularly time and money allocated to drinking.

CONCLUSIONS

Assessing social network features may guide interventions to increase PBS use and reduce drinking-related harms among emerging adult risky drinkers.

A randomized controlled trial of the effectiveness of combinations of 'why to reduce' and 'how to reduce' alcohol harm-reduction communications

INTRODUCTION

Alcohol is a major source of harm worldwide. The aim of this study was to experimentally assess the effects of exposing Australian adult drinkers to combinations of 'why to reduce' and 'how to reduce' alcohol harm-reduction messages.

METHODS

Three online surveys were administered over six weeks: Time 1 at baseline (n = 7,995), Time 2 at three weeks post-baseline (n = 4,588), and Time 3 at six weeks post-baseline (n = 2,687). Participants were randomly assigned to one of eight conditions: (1) a control condition; (2) a 'why to reduce' television advertisement; (3-5) one of three 'how to reduce' messages referring to the following protective behavioral strategies (PBSs): Keep count of your drinks, Decide how many drinks and stick to it, It's okay to say no; and (6-8) the television advertisement combined with each PBS message individually. Intention-to-treat analyses were conducted to determine effects of condition assignment on changes over time in attempts to reduce alcohol consumption and amount of alcohol consumed.

RESULTS

Participants assigned to the 'TV ad' and 'TV ad + Keep count of your drinks PBS' conditions reported significant increases in attempts to reduce alcohol consumption. Only participants assigned to the 'TV ad + Keep count of your drinks PBS' condition exhibited a significant reduction in alcohol consumed (-0.87 drinks per person per week).

CONCLUSIONS

Well-executed 'why to reduce' alcohol harm-reduction advertisements can encourage drinkers to attempt to reduce their alcohol consumption. These ads may be effectively supplemented by specific 'how to reduce' messages designed to encourage drinkers to monitor their intake.

Measurement of substance-free reinforcement in addiction: A systematic review

A robust body of theoretical and experimental work highlights the influence of alternative, substance-free rewards on decisions to use alcohol and other drugs. However, translational applications have been limited in part by the lack of consensus on how to measure substance-free reinforcement in applied and clinical settings. The current study summarizes extant research utilizing self-report reinforcement or reward methodologies, and critically reviews the psychometric properties of the available measures. These studies (N = 50) fell into three categories: measures of recent substance-related and substance-free activity participation and enjoyment (n = 32), measures of time or monetary resource allocation (n = 15), and rating scale measures of reward availability and experience (n = 8). The available research suggests that, consistent with experimental laboratory research and with behavioral economic predictions, there is an inverse relation between substance-free reinforcement and substance use. These studies also support the clinical utility of these measures in predicting substance use severity and course. Reinforcement measures could be improved by enhancing content validity, multimethod convergent validity, and generalizability.