Daily mood-drinking slopes as predictors: a new take on drinking motives and related outcomes

Associations between day-level affect profiles and same-day substance use among young adults

OBJECTIVE

Emotions play a critical role in health risk behaviors, including substance use. However, current research often focuses exclusively on average levels of positive and negative affect, neglecting the complexity of daily emotional patterns. By capturing multiple dimensions of affect, including arousal and discrete states, we can improve our understanding of proximal predictors of substance use. The present study demonstrates the utility of a novel methodological approach for assessing affect patterns in daily life in relation to alcohol and cannabis use.

METHOD

Daily diary data from N = 154 young adults who reported recent heavy episodic drinking and simultaneous use of alcohol and cannabis were analyzed using a mixed-indicator latent profile analysis to identify and describe day-level affective patterns and outcomes.

RESULTS

Results revealed five distinct day-level profiles of affect: undifferentiated negative affect days, undifferentiated positive affect days, high-arousal positive affect days, mixed affect days, and low reactivity days. Undifferentiated positive affect days, high-arousal positive affect days, and low reactivity days were associated with significantly greater odds of same-day alcohol use compared to days characterized by undifferentiated negative affect (χ² = 10.55, p = .032).

CONCLUSIONS

Findings suggest that daily affect patterns differentially impact alcohol use and can inform the development of interventions for problematic substance use. Additionally, the innovative methodological approach employed herein could be applicable for investigating the role of emotion in other health behaviors. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Using ecological momentary assessments of negative affect and craving during residential opioid use disorder treatment to predict patients' relapse to substance use

BACKGROUND

Negative affect (NA) and craving are often independently examined as precipitators of relapse among individuals with substance use disorders, including opioid use disorder (OUD). Recent ecological momentary assessment (EMA) research has revealed that NA and craving frequently co-occur within individuals. Yet we know little about the general patterns of, and variability in, within-person associations between NA and craving, as well as whether the nature and degree of within-person NA-craving coupling predicts post-treatment time-to-relapse.

METHODS

Seventy-three patients (77 % male, Mage = 30.10, Range = 19-61) in residential treatment for OUD took part in a 12-day, 4× daily smartphone-based EMA study. Linear mixed-effects models tested within-person, day-level associations between self-reported NA and craving during treatment. The study used Person-specific slopes (i.e., average within-person NA-craving coupling for each participant) estimated from the mixed-effects model in survival analyses with Cox proportional hazards regression models to determine if between-person differences in the within-person coupling predicted post-treatment time-to-relapse (operationalized as the return to problematic use of any substance except tobacco), and whether this prediction was similar across patients' average levels of NA and craving intensity. The study monitored relapse through a combination of hair samples and reports from patients or alternative contacts via a voice response system twice a month for up to 120 days or more following discharge.

RESULTS

Among the 61 participants with time-to-relapse data, those with stronger positive within-person NA-craving coupling on average during residential OUD treatment had a lower hazard of relapsing (slower time to relapse) post-treatment than participants with weaker NA-craving slopes. The significant association held after controlling for interindividual differences in age, sex, and average levels of NA and craving intensity. Average NA and craving intensity did not moderate the association between NA-craving coupling and time-to-relapse.

CONCLUSIONS

Interindividual differences in average within-person, day-level NA-craving coupling during residential treatment predict OUD patients' post-treatment time-to-relapse.

The daily association between affect and alcohol use: A meta-analysis of individual participant data

Influential psychological theories hypothesize that people consume alcohol in response to the experience of both negative and positive emotions. Despite two decades of daily diary and ecological momentary assessment research, it remains unclear whether people consume more alcohol on days they experience higher negative and positive affect in everyday life. In this preregistered meta-analysis, we synthesized the evidence for these daily associations between affect and alcohol use. We included individual participant data from 69 studies (N = 12,394), which used daily and momentary surveys to assess affect and the number of alcoholic drinks consumed. Results indicate that people are not more likely to drink on days they experience high negative affect, but are more likely to drink and drink heavily on days high in positive affect. People self-reporting a motivational tendency to drink-to-cope and drink-to-enhance consumed more alcohol, but not on days they experienced higher negative and positive affect. Results were robust across different operationalizations of affect, study designs, study populations, and individual characteristics. These findings challenge the long-held belief that people drink more alcohol following increases in negative affect. Integrating these findings under different theoretical models and limitations of this field of research, we collectively propose an agenda for future research to explore open questions surrounding affect and alcohol use.

Quantifying heterogeneity in mood-alcohol relationships with idiographic causal models

BACKGROUND

Ecological momentary assessment (EMA) studies have provided conflicting evidence for the mood regulation tenet that people drink in response to positive and negative moods. The current study examined mood-to-alcohol relationships idiographically to quantify the prevalence and intensity of relationships between positive and negative moods and drinking across individuals.

METHOD

We used two EMA samples: 96 heavy drinking college students (sample 1) and 19 young adults completing an ecological momentary intervention (EMI) for drinking to cope (sample 2). Mood and alcohol use were measured multiple times per day for 4-6 weeks. Mood-alcohol relationships were examined using three different analytic approaches: standard multilevel modeling, group causal modeling, and idiographic causal modeling.

RESULTS

Both multilevel modeling and group causal modeling showed that participants in both samples drank in response to positive moods only. However, idiographic causal analyses revealed that only 63% and 21% of subjects (in samples 1 and 2, respectively) drank following any positive mood. Many subjects (24% and 58%) did not drink in response to either positive or negative mood in their daily lives, and very few (5% and 16%) drank in response to negative moods throughout the EMA protocol, despite sample 2 being selected specifically because they endorse drinking to cope with negative mood.

CONCLUSION

Traditional group-level analyses and corresponding population-wide theories assume relative homogeneity within populations in mood-alcohol relationships, but this nomothetic approach failed to characterize accurately the relationship between mood and alcohol use in approximately half of the subjects in two samples that were demographically and clinically homogeneous. Given inconsistent findings in the mood-alcohol relationships to date, we conclude that idiographic causal analyses can provide a foundation for more accurate theories of mood and alcohol use. In addition, idiographic causal models may also help improve psychosocial treatments through direct use in clinical settings.

Towards an affect intensity regulation hypothesis: Systematic review and meta-analyses of the relationship between affective states and alcohol consumption

While self-medication and positive and negative reinforcement models of alcohol use suggest that there is an association between daily affect and alcohol consumption, findings within the academic literature have been inconsistent. This pre-registered systematic review meta-analytically interrogated the results from studies amongst non-clinical populations that examine the relationship between daily affective states and alcohol consumption volume. PRISMA guided searches of PsychINFO, PsycARTICLES, Science Direct, PubMed, SCOPUS, and JSTOR databases were conducted. When both laboratory and field studies were included, meta-analyses with robust variance estimation yielded 53 eligible studies on negative affect (8355 participants, 127 effect sizes) and 35 studies for positive affect (6384 participants, 50 effect sizes). The significant pooled associations between intra-day affect and alcohol consumption were r = .09, [.03, .14] for negative affect, and r = .17, [.04, .30] for positive affect. A small-to-medium sized effect (d = .275, [.11, .44]) of negative affect on daily alcohol consumption volume was found in laboratory studies (14 studies, 1100 participants). While publication bias was suspected, P-curve analyses suggested that the results were unlikely to be the product of publication bias and p-hacking alone, and selection model analysis revealed no significant differences in results when publication bias was accounted for. For negative affect, using number of drinks as the measure of alcohol consumption was associated with lower effect sizes. For positive affect, the results demonstrated a decline of this observed effect over time. Overall, findings point towards the possibility of developing an affect intensity regulation theory of alcohol use. Conceptualizing the mood-alcohol nexus in terms of affect intensity regulation may afford a more parsimonious explanation of alcohol consumption rather than viewing the behavior as being shaped by either positive or negative affective states.

No evidence for trait- and state-level urgency moderating the daily association between negative affect and subsequent alcohol use in two college samples

It remains unclear whether the negative reinforcement pathway to problematic drinking exists, and if so, for whom. One idea that has received some support recently is that people who tend to act impulsively in response to negative emotions (i.e. people high in negative urgency) may specifically respond to negative affect with increased alcohol consumption. We tested this idea in a preregistered secondary data analysis of two ecological momentary assessment studies using college samples. Participants (N = 226) reported on their current affective state multiple times per day and also the following morning reported alcohol use of the previous night. We assessed urgency both at baseline and during the momentary affect assessments. Results from our Bayesian model comparison procedure, which penalises increasing model complexity, indicate that no combination of the variables of interest (negative affect, urgency, and the respective interactions) outperformed a baseline model that included two known demographic predictors of alcohol use. A non-preregistered exploratory analysis provided some evidence for the effect of daily positive affect, positive urgency, as well as their interaction on subsequent alcohol use. Taken together, our results suggest that college students' drinking may be better described by a positive rather than negative reinforcement cycle.

To drink, or to exercise: That is (not) the question! Daily effects of alcohol consumption and exercise on well-being

Drinking alcohol and exercising are two of the most popular ways of dealing with stress. Despite the fact that they often co-occur, few studies have examined the role of the two activities together in everyday well-being. The current research aimed to investigate the dynamics between these two daily activities and various indices of well-being in a natural environment by using a daily diary method and ecological momentary assessment. We asked 478 adults to record their alcohol intake, exercising activity, and momentary well-being, three times a day for 2 weeks. Significant detrimental effects of drinking alcohol and beneficial effects of exercising on well-being were observed on the next day, whereas no significant effect of well-being was found on the likelihood of drinking and exercising on the second day. Furthermore, sleep quality was identified as one of the factors influencing the changes of well-being induced by the drinking and exercising engaged in the previous day. The present research allows us to deepen our understanding of the lagged relationship between the daily activities of drinking alcohol/exercising and well-being and demonstrates the underlying mechanism for the observed effects. Theoretical and practical implications are discussed.

A systematic review and meta-analysis on the association between solitary drinking and alcohol problems in adults

BACKGROUND AND AIMS

Solitary drinking in adolescents and young adults is associated with greater risk for alcohol problems, but it is unclear whether this association exists in older demographics. The current paper is the first meta-analysis and systematic review, to our knowledge, to determine whether adult solitary drinking is associated with greater risk for alcohol problems.

METHODS

PsychINFO, PubMed and Google Scholar were searched following a pre-registered International Prospective Register of Systematic Reviews (PROSPERO) protocol (CRD42019147075) and Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology. Following the methodology used in our recent systematic review and meta-analysis on adolescent/young adult solitary drinking, we systematically reviewed solitary drinking measures/definitions, prevalence rates and associated demographic variables in adults. We then meta-analyzed (using random-effects models) associations between adult solitary drinking and alcohol use/problems, negative affect and negative/positive reinforcement-related variables (e.g. drinking to cope or for enhancement).

RESULTS

Solitary drinking was defined as drinking while physically alone in nearly all studies, but measures varied. Prevalence rates were generally in the 30-40% range, with some exceptions. In general, males were more likely than females to report drinking alone, and married individuals were less likely than unmarried individuals to report drinking alone; racial/ethnic differences were mixed. Meta-analytical results showed significant effects for the associations between solitary drinking and the following factors: alcohol consumption, r = 0.25, 95% confidence interval (CI) = 0.18, 0.33, k = 15, I²  = 97.41; drinking problems, r = 0.15, 95% CI = 0.10, 0.21, k = 14, I²  = 92.70; and negative reinforcement, r = 0.24, 95% CI = 0.14, 0.32, k = 11, I²  = 89.77; but not positive reinforcement, r = 0.02, 95% CI = 0.06, 0.09, k = 8, I²  = 76.18; or negative affect, r = 0.03, 95% CI = -0.02, 0.08, k = 8, I²  = 52.06. Study quality moderated the association between solitary drinking and negative affect (β = -0.07, P < 0.01) such that lower-quality studies were significantly associated with larger effect sizes. Study quality was generally low; the majority of studies were cross-sectional.

CONCLUSIONS

Solitary drinking appears to have a small positive association with alcohol problems.

Motives for Substance Use in Daily Life: A Systematic Review of Studies Using Ecological Momentary Assessment

The motivational model of substance use posits four motive subtypes (coping, enhancement, social, conformity) dynamically interact with contextual factors to impact decisions about substance use. Yet, prior studies assessing the motivational model have relied on between-person, cross-sectional evaluations of trait motives. We systematically reviewed ecological momentary assessments (EMA) studies (N=64) on motives for substance use to examine: methodological features of EMA studies examining the motivational model, support for the motivational model between and within individuals, and associations between trait motives and daily processes. Results of the reviewed studies provide equivocal support for the motivational model, and suggest that EMA measures and trait measures of motives might not reflect the same construct. The reviewed body of research indicates most studies have not examined the momentary and dynamic nature of the motivational model and more research is needed to inform interventions that address heterogeneous reasons for substance use in daily life.

Daily associations between affect and alcohol use among adults: The importance of affective arousal

OBJECTIVE

Little is known about whether level of affective arousal (i.e., high vs. low) is associated with alcohol use and whether this relationship differs by valence (i.e., positive vs. negative affect) among adults.

METHODS

Participants were n = 93 self-reported current drinkers (ages 25-65) who reported positive (PA) and negative affect (NA) seven times a day and alcohol use once a day for seven consecutive days. For each individual, mean levels of high arousal PA (e.g., excited), low arousal PA (e.g., satisfied), high arousal NA (e.g., frustrated), and low arousal NA (e.g., sad) were computed for each day.

RESULTS

Alcohol use was reported on 30% of person-days, with an average of 2.3 drinks consumed on drinking days. Heavy episodic drinking (4+/5+ drinks for women/men) occurred on 4% of days. After covarying for age, gender, and weekday, days with higher-than-usual levels of high arousal PA were associated with a 52% increase in the odds of consuming any alcohol and a 105% increase in the odds of engaging in heavy episodic drinking. Individuals reporting more low arousal PA on average had a 77% increase in the odds of heavy episodic drinking. No significant associations between high or low arousal NA and alcohol use were found.

CONCLUSIONS

Greater PA, but not NA, was associated with heavy alcohol use at both the within- and between-person levels, perhaps attributable to social and enhancement drinking motives. Results differed by arousal, highlighting the importance of considering a wide range of affective states when examining alcohol use behavior.

Daily Patterns of Emotional Functioning on Drinking and Nondrinking Days

BACKGROUND

Alcohol misuse continues to be a significant public health problem. Understanding the factors that may contribute to the harmful progression in drinking is an important aspect of public health. Previous research has shown that affect regulation is associated with problematic alcohol use. Additionally, emotion instability has been found as a predictor of alcohol-related problems and may be linked to reinforcement mechanisms.

METHODS

The current study examined positive mood, negative mood, and mood instability in real time across drinking and nondrinking days utilizing ecological momentary assessment (EMA). Current drinkers (n = 74) were recruited for a 21-day EMA study. Participants completed up to 10 random assessments of positive mood, negative mood, and alcohol use per day. Mood instability was assessed as the squared difference in current mood from mood in the previous assessment. Data were analyzed using piecewise multilevel regression to examine mood trajectories across drinking and nondrinking days.

RESULTS

Positive emotion across the day was higher on drinking days than nondrinking days and continued to increase after drinking initiation. In contrast, negative emotion across the day was lower on drinking days than nondrinking days and continued to decrease after drinking initiation. Emotional functioning was stable across the day on nondrinking days. However, on drinking days there was a steady increase in emotional instability leading up to drinking initiation, followed by a rapid stabilization after initiation.

CONCLUSIONS

This study highlights the potentially reinforcing impact of alcohol via emotional stability. Overall, these findings highlight the importance of mood dynamics when examining the reinforcing effects of alcohol consumption.

The mediating role of school connectedness in the associations between dating and sexual violence victimization and substance use among high school students

Dating and sexual violence victimization affect a significant portion of teenagers and result in a wide array of negative health and behavioral outcomes, including increased alcohol and drug use. In some cases, students who have been victimized may develop feelings of being unsupported by or disconnected from peers and adults in their school community, placing them at even higher risk for negative health outcomes. Using a prospective design, the present study sought to explore this possibility by examining the direct and indirect associations between dating violence (DV) and sexual violence (SV) victimization, school connectedness, and alcohol and marijuana use at baseline (T1) and 2-month follow-up (T2) in a sample of high school students (N = 1752). Results of multiple regression analyses supported a hypothesized mediation model of these associations; both forms of victimization were positively associated with heavy drinking at T1 and marijuana use at T1 and T2, and negatively associated with school connectedness. Furthermore, school connectedness was negatively associated with both forms of substance use at T1 and T2, and partially mediated the effects of DV and SV victimization on heavy drinking at T1, and marijuana use at T1 and T2. These findings elucidate the importance of addressing intermediary cognitive processes such as perceptions of school connectedness in order to improve health and functional outcomes among high school victims of dating and sexual violence.

Using Demand Curves to Quantify the Reinforcing Value of Social and Solitary Drinking

BACKGROUND

Young adults typically drink in social settings and report high levels of episodic heavy drinking despite a range of adverse consequences. Behavioral economics posits that this may reflect a reinforcer pathology in which alcohol is overvalued relative to other reinforcers. Theoretically, the value of alcohol is related to both the direct pharmacological effects of alcohol (euphoria, sedation) and the associated social reinforcement, but to date no studies have differentiated the value of social vs. solitary drinking. The current study examines two modified hypothetical alcohol purchase tasks (APTs), one explicitly social and one explicitly solitary, in order to quantify the reward value of social vs. solitary drinking and to determine whether there are unique clinical correlates of solitary alcohol demand.

METHODS

Participants were young adults (N = 274, Mage  = 25.15, SD = 4.10) recruited from Mturk and from a university subject pool. Participants completed a solitary and social APT, in addition to measures of alcohol consumption and problems.

RESULTS

Participants reported significantly greater demand in the social APT compared to the solitary APT across all demand indices. Elevated solitary and social demand were associated with elevated levels of alcohol use and problems. Using a residualized change approach, solitary demand amplitude (maximum consumption and expenditure) and persistence (price sensitivity) contributed additional variance above and beyond their social APT composite counterparts in predicting typical drinks per week and the self-care, academic/occupational, and physical dependence subscales of the YAACQ.

CONCLUSIONS

The presence of peers increases alcohol demand compared to a solitary scenario, and greater relative solitary drinking demand may be a risk factor for greater alcohol consumption and problems.

Potions for Emotions: Do self-reported individual differences in negative-emotional drinking predict alcohol consumption in the laboratory following exposure to a negative experience?

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Increased alcohol consumption in response to negative emotion can be observed in the laboratory.

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This phenomenon is best predicted by self-reports on observable behavior and not by drinking motives.

Aims

Research suggests that self-reports on inferred motives for engaging in behavior may be biased by limited introspective access into such processes. Self-reports on observable behavior, on the other hand, may generate more accurate responses with which to predict behavior. The aim was to determine whether drinking alcohol in response to negative emotion (negative-emotional drinking; NED) is best predicted by self-reported individual differences in (a) motives to use alcohol to regulate negative emotion, or (b) the degree to which negative emotion impacts alcohol consumption (observable behavior).

Methods

Thirty-nine beer drinkers completed the Drinking Motives Questionnaire-Revised (DMQ-R) which measures individual differences in drinking motives, including the motive to regulate negative emotion (coping motives). They also completed a new self-report measure of the degree to which negative emotion impacts their alcohol consumption. Participants were randomized into a negative emotion induction condition or control condition and completed a subsequent alcohol consumption task to serve as a behavioral measure of drinking in response to negative emotion.

Results

Self-reports on the degree to which negative emotion impacts respondents’ alcohol consumption strongly predicted alcohol consumption in the negative emotion induction condition (r = 0.72, p = <.001) and not in the control condition (r = 0.09, p = .696). Self-reported coping motives did not predict alcohol consumption in either condition.

Conclusions

The amount of alcohol consumed in response to negative emotion is best predicted by self-reports on observable behavior, and not by self-reports on drinking motives.

Pathways from Positive, Negative, and Specific Alcohol Expectancies to Weekday and Weekend Drinking to Alcohol Problems

The current study tested and identified risk and protective pathways from alcohol expectancies to weekday and weekend consumption to problematic consequences. Adult alcohol users (N = 395) completed measures of alcohol expectancies, daily consumption habits during a typical week, and alcohol-related problems. Confirmatory factor analysis supported the five-factor structure of positive expectancy, negative expectancy, weekday drinking, weekend drinking, and alcohol problems. The structural equation model specifying general positive and negative expectancy to weekday and weekend use to alcohol problems exhibited satisfactory fit indices. Specifically, positive expectancy contributed to greater weekend drinking, but negative expectancy prompted greater weekday drinking. Furthermore, lower positive expectancy, higher negative expectancy, higher weekday drinking, and higher weekend drinking each uniquely explained greater alcohol problems. The structural equation model involving the seven specific expectancies to weekday and weekend use to alcohol problems produced high fit indices. Specifically, higher risk and aggression, higher self-perception, and lower cognitive and behavioral impairment expectancies uniquely predicted weekday drinking. In contrast, higher sociability, higher liquid courage, higher risk and aggression, and lower cognitive impairment expectancies explained weekend drinking. The predictive model premised on specific alcohol expectancies as distinct constructs exhibited higher fit indices and more nuanced insights regarding risk and protective pathways for prevention than the model involving general positive versus negative expectancy constructs. Findings underscore that different types of self-fulfilling alcohol expectancy beliefs distinctively explain weekday versus weekend intake and problems.

Relationship between relative deprivation and health of Hainan Island residents: mediating effect of negative health behaviors

Despite extensive evidence of the direct impact of relative deprivation on health, the mediating role of tobacco, alcohol and betel nuts in this impact has been largely ignored. This study aimed to verify whether these negative health behaviors are mediating factors for relative deprivation and health according to the mediating effect concept. Data from the Hainan Island Residents Health Interview Survey in 2017 were used. Variables including age, marital status, educational level, chronic diseases and area of residence were controlled for in multivariate analysis with separate sex analyses. Mediating effects of smoking, alcohol drinking and betel nut chewing, and whether the effects were complete or partial, were analyzed by logistic regression analysis. Smoking, alcohol drinking and betel nut chewing had a significant mediating effect in men, but not in women; however, alcohol drinking and betel nut chewing had similar, significant complete mediation in both sexes. Dissatisfaction following relative deprivation due to uneven income distribution may be relieved through these negative health behaviors. Therefore, better medical resources should be provided to improve residents’ health and the impact of income inequality on health, particularly the growing gap between the rich and poor, should be addressed.

Annual Research Review: Ecological momentary assessment studies in child psychology and psychiatry

BACKGROUND

Enhancements in mobile phone technology allow the study of children and adolescents' everyday lives like never before. Ecological momentary assessment (EMA) uses these advancements to allow in-depth measurements of links between context, behavior, and physiology in youths' everyday lives.

FINDINGS

A large and diverse literature now exists on using EMA to study mental and behavioral health among youth. Modern EMA methods are built on a rich tradition of idiographic inquiry focused on the intensive study of individuals. Studies of child and adolescent mental and behavioral health have used EMA to characterize lived experience, document naturalistic within-person processes and individual differences in these processes, measure familiar constructs in novel ways, and examine temporal order and dynamics in youths' everyday lives.

CONCLUSIONS

Ecological momentary assessment is feasible and reliable for studying the daily lives of youth. EMA can inform the development and augmentation of traditional and momentary intervention. Continued research and technological development in mobile intervention design and implementation, EMA-sensor integration, and complex real-time data analysis are needed to realize the potential of just-in-time adaptive intervention, which may allow researchers to reach high-risk youth with intervention content when and where it is needed most.

I drink alone: Mechanisms of risk for alcohol problems in solitary drinkers

Although solitary drinking is less common than social drinking, it may be uniquely associated with heavy drinking and alcohol-related problems. There is also evidence that drinking contexts impact both expected and experienced alcohol effects. In particular, solitary drinking may be associated with an increased likelihood of drinking for negative reinforcement (e.g. to relieve stress). The current study examined how drinking context influences tension reduction expectancies and drinking motives, and the extent to which expectancies and motives mediate the link between solitary drinking and alcohol-related problems. We hypothesized that solitary drinking would be associated with greater tension reduction expectancies and coping motives which, in turn, would be associated with more alcohol related problems. Data were from 157 young adult moderate to heavy drinkers (21-30 years of age, 57% male) who completed baseline assessments in an alcohol administration study. A path model in Mplus tested the hypothesized mediated effects. Findings largely supported study hypotheses with significant indirect effects of solitary drinking (but not social drinking) on alcohol problems through stronger tension reduction expectancies and coping motives, though an indirect path through coping motives (but not expectancies) was also identified. Multi-group models by gender and race/ethnicity found that models operated similarly for men and women and for Non-Hispanic Caucasian and Racial/Ethnic Minority participants. The results provide important information about potential mechanisms through which solitary drinking may contribute to alcohol problems. These mechanisms represent potential targets of intervention (e.g. tension reduction expectancies, drinking to cope) for solitary drinkers.

Does it work and does it last? Effects of social and drinking behavior on same- and next-day mood

Both social and drinking behavior have the potential to modify mood. However, if social drinking enhances positive mood and reduces negative mood, as compared to non-drinking social behavior, then interventions to reinforce non-drinking via sober social activity are undermined. Using multilevel modeling analyses, we compared end-of-day mood on drinking days versus non-drinking days, and on days spent with other people as compared to days spent primarily alone. We evaluated the interaction between drinking/non-drinking and social/solitary behavior and assessed whether the effects of social and drinking behavior extended to mood the next day. Participants were 352 college students (53% female; 55% fraternity/sorority membership; mean age 19.7 years) who completed three automated telephone surveys each day during four 14-day intervals over 1 year. Drinking and being social were associated with higher end-of-day positive mood and significantly lower end-of-day negative mood. However, no positive enhancement or negative attenuation effects of alcohol were observed in interaction analyses. Alcohol provided no improvement in mood over-and-above being social at the end of the day or on the following day. However, drinking the previous day significantly reduced next-day positive mood, whereas being social significantly reduced next-day negative mood. These findings provide support for the reinforcing potential of interventions that increase rewarding social activity in the place of alcohol use.

On the Use of Empirical Bayes Estimates as Measures of Individual Traits

Empirical Bayes (EB) estimates of the random effects in multilevel models represent how individuals deviate from the population averages and are often extracted to detect outliers or used as predictors in follow-up analysis. However, little research has examined whether EB estimates are indeed reliable and valid measures of individual traits. In this article, we use statistical theory and simulated data to show that EB estimates are biased toward zero, a phenomenon known as "shrinkage." The degree of shrinkage and reliability of EB estimates depend on a number of factors, including Level-1 residual variance, Level-1 predictor variance, Level-2 random effects variance, and number of within-person observations. As a result, EB estimates may not be ideal for detecting outliers, and they produce biased regression coefficients when used as predictors. We illustrate these issues using an empirical data set on emotion regulation and neuroticism.

Ecological momentary assessment of drinking in young adults: An investigation into social context, affect and motives

INTRODUCTION

Daily assessment studies have examined how day specific factors, such as affect, social context, and drinking motives, alongside dispositional drinking motives, predict young adults' drinking. However, these studies did not examine how the interplay between drinking motives (dispositional and day specific) and multiple features of the drinking situation predict drinking with respect to either the initial decision to drink or the quantity of alcohol consumed. Ecological momentary assessment (EMA) via smartphone technology, enables us to address this gap by evaluating to what extent dispositional drinking motives and day specific factors are associated with: a) the initiation of drinking episodes and; b) the quantity of alcohol consumed.

METHODS

Participants were 83 young adults (63 female) aged 18 to 30 (M = 21.42, SD = 3.09) who resided in Australia and participated in an EMA study for 21 days via their smartphone. On a daily basis, participants received three random-interval prompts that measured momentary affect, drinking motives, social context (e.g., people present in the social context and if these individuals are drinking), and alcohol use.

RESULTS

A multilevel hurdle analysis found that young adults were more likely to both initiate a drinking episode and consume a higher quantity of alcohol if they were surrounded by other people who were drinking and were motivated to drink to conform to the reference group.

CONCLUSIONS

This study is the first of its kind to demonstrate that different drinking behaviors (i.e., initiation and quantity of alcohol consumed) are associated with a similar set of predictors. Drinking-based interventions that address these risk factors could effectively reduce risky drinking as it would intervene on both the decision to initiate alcohol use, and the decision to continue drinking.

Tension reduction and affect regulation: An examination of mood indices on drinking and non-drinking days among university student drinkers

Several theories posit problematic alcohol use develops through mechanisms of positive and negative reinforcement. However, the literature on these mechanisms remains inconsistent. This may be due to a number of issues including a failure to disaggregate negative mood or a failure to account for mood functioning (i.e., stability in mood). Alternatively, there may be differences in typical postdrinking/evening mood on drinking and nondrinking days, however, this has yet to be fully explored. We examined multiple indices of distinct mood states prior to and after typical drinking onset times on drinking and nondrinking days using ecological momentary assessment. College student drinkers (n = 102) carried personal data devices for 15 days. They reported on mood and alcohol use several times per day. Tonic positive mood was higher on drinking days than nondrinking days prior to typical drinking initiation. After typical drinking times, positive mood was higher on drinking days than nondrinking days. Similarly, negative moods (anxiety, stress, anger, and stress instability) indicated a pattern of lower levels relative to both predrinking mood on drinking days, and matched mood time-points on nondrinking days; though, not all of these differences were statistically different. Results suggest positive and negative reinforcing mechanisms may be at play-though the negative reinforcement effects may manifest through subjectively "better" mood on drinking versus nondrinking days. (PsycINFO Database Record

Negative and Positive Emotion Responses to Daily School Problems: Links to Internalizing and Externalizing Symptoms

Examining emotion reactivity and recovery following minor problems in daily life can deepen our understanding of how stress affects child mental health. This study assessed children's immediate and delayed emotion responses to daily problems at school, and examined their correlations with psychological symptoms. On 5 consecutive weekdays, 83 fifth graders (M = 10.91 years, SD = 0.53, 51% female) completed brief diary forms 5 times per day, providing repeated ratings of school problems and emotions. They also completed a one-time questionnaire about symptoms of depression, and parents and teachers rated child internalizing and externalizing problems. Using multilevel modeling techniques, we assessed within-person daily associations between school problems and negative and positive emotion at school and again at bedtime. On days when children experienced more school problems, they reported more negative emotion and less positive emotion at school, and at bedtime. There were reliable individual differences in emotion reactivity and recovery. Individual-level indices of emotion responses derived from multilevel models were correlated with child psychological symptoms. Children who showed more negative emotion reactivity reported more depressive symptoms. Multiple informants described fewer internalizing problems among children who showed better recovery by bedtime, even after controlling for children's average levels of exposure to school problems. Diary methods can extend our understanding of the links between daily stress, emotions and child mental health. Recovery following stressful events may be an important target of research and intervention for child internalizing problems.

Drinking Motives as a Moderator of the Relationship Between Dating Violence Victimization and Alcohol Problems

The present study sought to examine whether drinking motives (i.e., coping, social, conformity, and enhancement) moderated the relationship between physical, sexual, and psychological dating violence victimization and alcohol-related problems in a sample of drinking college women ( N = 177). Results demonstrated that coping and social drinking motives moderated the relationship between sexual victimization and alcohol problems; conformity, social, and enhancement drinking motives moderated the relationship between alcohol-related problems and physical victimization; no significant findings were evident for psychological aggression victimization. Our results partially support the self-medication model of alcohol use, and this may be particularly relevant to sexual victimization.

Stressor-related drinking and future alcohol problems among university students

Research using daily designs has shown that daily stressors (i.e., conflict, school/work demands) are associated with alcohol use, and that the strength of within-person links between stressors and alcohol use differs from person to person. However, to our knowledge no research has tested whether individual differences in stressor-related drinking-characterized by within-person associations between daily stressors and drinking-predict risk for future alcohol problems, a relationship suggested by theoretical models. The current study used an Internet-based daily diary design among 744 university students to (a) examine the day-level relationship between stressors and alcohol use during the first 3 years of college, and (b) test whether individual differences in the stressor-drinking relationship, captured by person-specific slopes generated from multilevel models, predicted alcohol problems as measured by the Alcohol Use Disorders Identification Test (AUDIT) in the fourth year of college. Results showed that students were more likely to drink on days with many versus fewer stressors, and on drinking days, students consumed more drinks with each additional stressor they experienced. Next, using individual multilevel modeling slopes as predictors, we found that students whose odds of drinking alcohol increased more sharply on high- versus low-stressor days (steeper slopes) had more severe AUDIT alcohol problems in the fourth year than students whose drinking odds increased less sharply (flatter slopes). Findings highlight the role of daily stressors in college student drinking and suggest stressor-related drinking as a risk factor for future alcohol problems. (PsycINFO Database Record

Daily Assessment of Acute Dynamic Risk in Paroled Offenders: Prediction, Predictive Accuracy and Intervention Effect

Few studies have assessed acute dynamic risk repeatedly among paroled offenders to investigate the relationship between changes in acute dynamic risk and recidivism in crime. The present study investigates whether one-month changes in ten stress-related acute dynamic risk factors, collected through automated telephony while the participants were still in prison and over 30 consecutive days following parole, predict one-year criminal recidivism, including its predictive accuracy. The study also investigates whether a brief feedback intervention in conjunction with the daily assessments reduces recidivism compared to an assessment-only control group. Changes in five risk factors were found to be associated with increased risk of criminal recidivism after controlling for the results in prison, the initial value after parole, and the intervention. The predictive accuracy is marginally accurate: Summary score (AUC) = .666; Level of stress (AHSS) = .644; Psychiatric symptoms (SCL-8D) = .641; Anxiety symptoms = .673; Severity of most stressful daily event = .690. No differences in one-year recidivism rates were established between the intervention group and the control group. The study shows that daily assessments can usefully be made of dynamic risk factors in paroled offenders.

Conceptualizing and Measuring Weekend versus Weekday Alcohol Use: Item Response Theory and Confirmatory Factor Analysis

Culturally, people tend to abstain from alcohol intake during the weekdays and wait to consume in greater frequency and quantity during the weekends. The current research sought to empirically justify the days representing weekday versus weekend alcohol consumption. In study 1 (N = 419), item response theory was applied to a two-parameter (difficulty and discrimination) model that evaluated the days of drinking (frequency) during the typical 7-day week. Item characteristic curves were most similar for Monday, Tuesday, and Wednesday (prototypical weekday) and for Friday and Saturday (prototypical weekend). Thursday and Sunday, however, exhibited item characteristics that bordered the properties of weekday and weekend consumption. In study 2 (N = 403), confirmatory factor analysis was applied to test six hypothesized measurement structures representing drinks per day (quantity) during the typical week. The measurement model producing the strongest fit indices was a correlated two-factor structure involving separate weekday and weekend factors that permitted Thursday and Sunday to double load on both dimensions. The proper conceptualization and accurate measurement of the days demarcating the normative boundaries of "dry" weekdays and "wet" weekends are imperative to inform research and prevention efforts targeting temporal alcohol intake patterns.

Emotions and family interactions in childhood: Associations with leukocyte telomere length emotions, family interactions, and telomere length

Conceptualizations of links between stress and cellular aging in childhood suggest that accumulating stress predicts shorter leukocyte telomere length (LTL). At the same time, several models suggest that emotional reactivity to stressors may play a key role in predicting cellular aging. Using intensive repeated measures, we tested whether exposure or emotional "reactivity" to conflict and warmth in the family were related to LTL. Children (N=39; 30 target children and 9 siblings) between 8 and 13 years of age completed daily diary questionnaires for 56 consecutive days assessing daily warmth and conflict in the marital and the parent-child dyad, and daily positive and negative mood. To assess exposure to conflict and warmth, diary scale scores were averaged over the 56 days. Mood "reactivity" was operationalized by using multilevel modeling to generate estimates of the slope of warmth or conflict scores (marital and parent-child, separately) predicting same-day mood for each individual child. After diary collection, a blood sample was collected to determine LTL. Among children aged 8-13 years, a stronger association between negative mood and marital conflict, suggesting greater negative mood reactivity to marital conflict, was related to shorter LTL (B=-1.51, p<.01). A stronger association between positive mood and marital affection, suggesting positive mood reactivity, was related to longer LTL (B=1.15, p<.05). These effects were independent of exposure to family and marital conflict and warmth, and positive and negative mood over a two-month period. To our knowledge, these findings, although cross-sectional, represent the first evidence showing that link between children's affective responses and daily family interactions may have implications for telomere length.

Neuropeptide S receptor gene variant and environment: contribution to alcohol use disorders and alcohol consumption

The functional polymorphism Asn(107) Ile (rs324981, A > T) of the neuropeptide S receptor (NPSR1) gene is involved in the modulation of traits that affect alcohol use. Hence, we have examined whether the NPSR1 A/T polymorphism is associated with alcohol use disorders (AUD) and alcohol use in a population-representative sample. Lifetime AUD were assessed by the MINI psychiatric interview (n = 501) in the older cohort of the longitudinal Estonian Children Personality Behaviour and Health Study at age 25. Alcohol use, environmental adversities and personality were reported by both the younger (original n = 583) and the older cohort (original n = 593) in three study waves. NPSR1 associations with AUD and alcohol use differed by sex. In females, both AUD [odds ratio (OR) = 7.20 (0.94-55.0), P = 0.029] and harmful alcohol use were more prevalent in A-allele carriers. In contrast, in males, AUD was more frequent in T-allele carriers [OR = 2.75 (1.19-6.36), P = 0.017], especially if exposed to adverse environments at age 15 [OR = 10 (1.18-84.51), P = 0.019]. Alcohol use was higher in male T-allele carriers at ages 15 and 18 as well. Similarly to females, however, the risk allele for higher alcohol use for males at age 25 was the A-allele. Many of the effects on alcohol use were explained by genotype effects on measures of personality. In the general population, the NPSR1 Asn(107) Ile polymorphism is associated with AUD and alcohol consumption, dependent on sex, environment and age. The results are in line with the impulsivity and personality regulating role of the NPSR1.

Having friends and feeling lonely: a daily process examination of transient loneliness, socialization, and drinking behavior

Loneliness is a well-known indicator of relationship deficits, with potentially severe consequences on health and well-being (Perlman & Peplau, 1981). Research has used cross-sectional methods to examine behavioral consequences of loneliness (e.g., Cacioppo et al., 2002). However, within-person associations between daily fluctuations in loneliness and subsequent behavioral outcomes have yet to be explored. Using a sample of community-dwelling adults, the authors examined associations between daily loneliness on daily time with others, and subsequent context-specific alcohol consumption (i.e., social and solitary consumption), and individual differences in these patterns of behavior. Daytime loneliness significantly and uniquely predicted patterns of social behavior and context-specific consumption; time with others mediated loneliness-social consumption associations, but not loneliness-solitary consumption relationships. These findings contribute to existing literature by demonstrating the unique properties of solitary versus social consumption as behavioral responses to loneliness, thus addressing inconsistent findings regarding the effects of loneliness on alcohol consumption.

Ecological momentary assessment of acute alcohol use disorder symptoms: associations with mood, motives, and use on planned drinking days

Several theories posit that alcohol is consumed both in relation to one's mood and in relation to different motives for drinking. However, there are mixed findings regarding the role of mood and motives in predicting drinking. Ecological momentary assessment (EMA) methods provide an opportunity to evaluate near real-time changes in mood and motives within individuals to predict alcohol use. In addition, endorsement of criteria of an alcohol use disorder (AUD) may also be sensitive to changes within subjects. The current study used EMA with 74 moderate drinkers who responded to fixed and random mood, motive, alcohol use, and AUD criteria prompts over a 21-day assessment period. A temporal pattern of daytime mood, evening drinking motivation, and nighttime alcohol use and acute AUD symptoms on planned drinking days was modeled to examine how these associations unfold throughout the day. The results suggest considerable heterogeneity in drinking motivation across drinking days. Additionally, an affect regulation model of drinking to cope with negative mood was observed. Specifically, on planned drinking days, the temporal association between daytime negative mood and the experience of acute AUD symptoms was mediated via coping motives and alcohol use. The current study found that motives are dynamic, and that changes in motives may predict differential drinking patterns across days. Further, the study provides evidence that emotion-regulation-driven alcohol involvement may need to be examined at the event level to fully capture the ebb and flow of negative affect motivated drinking.