A systematic review of the acute effects of alcohol on emotion recognition of facial expressions.

Alcohol has been linked to both positive (e.g., sociability) and negative (e.g., aggression) social outcomes, and researchers have proposed that alcohol-induced changes in emotion recognition may partially explain these effects. Here, we systematically review alcohol administration studies to clarify the acute effects of alcohol on emotion recognition. We also investigate various moderator variables (i.e., sex, study quality, study design, alcohol dosage, emotion recognition task and outcome measure). PsycINFO, PubMed and Google Scholar were searched following a pre-registered PROSPERO protocol (CRD42021225392) and PRISMA methodology. Analyses focused on differences in emotion recognition between participants consuming alcoholic and/or non-alcoholic (i.e., placebo or no-alcohol control) beverages. Nineteen unique samples (N = 1271 participants) were derived from 17 articles (two articles included two studies, each conducted on a unique sample). Data were extracted for sample characteristics, alcohol administration methods and emotion recognition tasks and outcomes. All studies compared an alcoholic beverage to a placebo beverage and used tasks that asked participants to identify emotions from images or videos of facial expressions. Otherwise, methodologies varied substantially across studies, including the alcohol dosage(s) tested, the specific emotion recognition task(s) used and the outcome variable(s) assessed. No consistent effects of alcohol on emotion recognition emerged for any emotion. None of the moderator variables affected the findings, except for some indication that alcohol may affect males' emotion recognition abilities more so than females. Alcohol does not appear to consistently affect positive or negative emotion recognition of facial expressions, at least with the tasks currently used in the field.

Indirect effects of theory of mind on alcohol use and problems in underage drinkers: The role of peer pressure to drink.

Objective: Prior studies demonstrate a link between socio-cognitive deficits and alcohol problems in adolescents and young adults. Researchers have proposed that young people with such deficits may misperceive and over-value peers' attitudes about drinking and consider drinking a way to be accepted by their peer group. We test this hypothesis by investigating whether theory of mind (ToM) deficits in underage (18-20-year-old) drinkers are associated with binge drinking and alcohol problems, and whether these ToM deficits have an indirect effect on alcohol outcomes through perceived peer pressure to drink (i.e., high conformity motives and low perceived ability to refuse alcohol during social pressure). Method: Participants (N = 472; 91 % female; 71 % White; Mage = 19.28 ± 0.77) were recruited from TurkPrime and completed measures assessing ToM, conformity motives, self-efficacy to resist peer pressure to drink, alcohol problems, and binge drinking. Bivariate correlations were run to examine associations between study variables. Indirect effect models were run in SPSS, using the PROCESS add-on, to assess the indirect effects of ToM on alcohol outcomes through conformity motives and self-efficacy to refuse peer pressure to drink. Results: ToM had indirect effects on binge drinking and alcohol problems through conformity motives (but not self-efficacy to resist peer pressure to drink). Lower ToM was associated with higher conformity motives, which were then associated with more frequent binge drinking and greater alcohol problems. Conclusions: These findings highlight the role of social cognition in young adult alcohol misuse and suggest more work is needed to understand the potential influence of peer pressure in this association.