Is vegetarianism related to anxiety and depression? A cross-sectional survey in a French sample.

OBJECTIVE: The relationship between vegetarianism and mental health is controversial. The aim of the present study is to examine the cross-sectional association between anxiety, depression, and vegetarianism in a French sample while controlling for potential confounders. DESIGN: Self-reported questionnaire data were obtained from a large cross-sectional sample. PARTICIPANTS AND SETTING: We included an online sample of 6578 participants aged 18-90, 70.8% females. RESULTS: Analyses of variance with age, gender, body mass index (BMI), educational level, monthly income, and city size as covariates showed that vegetarians and non-vegetarians did not appear to have significantly different levels of anxiety or depression. CONCLUSION: Our findings do not suggest a link between plant-based diet and anxiety or depression, either before or after adjustment for relevant factors.

Psychological distress mediates the connection between sleep deprivation and physical fighting in adolescents.

Lack of sleep is common in adolescence, and represents an important threat to adolescents' well-being, academic commitment, and general health. It also has significant behavioral consequences through an increased likelihood of interpersonal violence. Previous studies have demonstrated an association between aggressive behavior and lack of sleep, but the psychological mediators remain completely unexplored. Grounded in the General Aggression Model, we investigated the affective pathway as one of the potential mechanisms linking lack of sleep and aggression. We hypothesized and showed that psychological distress is an intermediary phenomenon linking lack of sleep and physical aggression. Based on a school sample of 11,912 participants (median age: 14.5), we observed that 23.7% of the young people admitted having been involved in physical fighting on one or more occasions, and that 25.81% were in sleep debt when referred for medical assessment. We analyzed the relationship between sleep duration and physical fighting and the mediating link of psychological distress by performing multiple regressions in the components' paths. The results showed that the adolescents' amount of sleep appeared to be a significant predictor of physical fighting, and that this relationship was partially mediated by psychological distress. These results are consistent with the General Aggression Model, and represent the first empirical confirmation that psychological distress symptoms partially mediate the connection between lack of sleep and physical aggression.

Explaining Animal Abuse Among Adolescents: The Role of Speciesism.

Animal abuse is considered a significant marker of violence towards humans, and understanding its determinants is important. In this first large-scale survey on adolescent animal abuse carried out in France, we introduced and tested the relative explanatory power of a new variable potentially involved in animal abuse: speciesism, defined as the belief that humans are intrinsically more valuable than individuals of other species. In a school sample composed of 12,344 participants aged 13-18 years, we observed that 7.3% of participants admitted having perpetrated animal abuse. Consistent with existing studies, cats and dogs were the animals most often abused. Animal abuse was a solitary behavior approximately half of the time, and in 25% of instances it involved only another person. A multivariate logistic regression revealed that animal abuse was more frequent among males and that it occurred more often among adolescents with less positive family climate, lower support from friends, lower attachment to school, and with higher anxio-depressive symptomatology. As implied by the generalized deviance hypothesis, animal abuse was related to more deviant behavior such as drunkenness and bullying. Moreover, this study showed for the first time that animal abuse was higher among adolescents who endorsed speciesist attitudes. These results suggest that beyond psychopathological factors, normative beliefs regarding the value of animals and their human use may also be involved in animal mistreatment.

Authoritarian attitudes are associated with higher autonomic reactivity to stress and lower recovery.

Right-wing authoritarianism (RWA) and social dominance orientation (SDO) both predict generalized prejudice, dehumanization, intergroup discrimination, oppression, violence, right-wing political party preference, and generally punitive attitudes. Authoritarian attitudes have been theorized to involve maladaptive emotional, cognitive, and social self-regulation. However, there is no study of authoritarianism using the functioning of the parasympathetic nervous system (PNS) as a physiological index of self-regulation, thus leaving it unclear whether regulation is "impaired" with authoritarian attitudes per se. PNS functioning is commonly assessed by examining tonic and phasic heart rate variability (HRV). These two components are recognized to be important in terms of adaptation to stress. Decreased HRV has been associated with hypoactive prefrontal regulation, hyperactive subcortical structures, maladaptive self-regulation, hyper-vigilance, decreased prosocial tendencies, defensiveness, impulsive behaviors, and aggression. Previous research suggests that self-regulatory failure may favor hostile attitudes and prejudicial intergroup behaviors. In a first study, we found that high RWA was associated with lower tonic HRV at rest. In a second study, stress-induced autonomic reactivity and poststress autonomic recovery were examined as potential pathways linking authoritarian attitudes to self-regulation. We found that high RWA and high SDO were associated with (i) lower tonic HRV during stress, (ii) greater autonomic reactivity during stress, and (iii) lower autonomic recovery. Overall, our results suggest that autonomic dysregulation during and following stress is a plausible physiological pathway connecting RWA and SDO to self-regulation. Implications of such results for research on political attitudes are discussed. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Sacrificing Animals in the Name of Scientific Authority: The Relationship Between Pro-Scientific Mindset and the Lethal Use of Animals in Biomedical Experimentation.

The present research investigated how scientific authority increases the lethal use of animals in biomedical experimentation. In two behavioral studies (N = 151 and 150), participants were required to incrementally administer 12 doses of a toxic chemical to a 53-cm fish (in reality, a biomimetic robot) for research on animal learning. Consistent with the Engaged Followership Theory on obedience, participants placed in a pro-scientific mindset more severely harmed the laboratory animal. In a cross-sectional study (N = 351), participants in medical fields endorsed a more pro-scientific attitude than those in paramedical fields, which mediated their support for animal experimentation. Drawing on a representative European sample (N = 31,238), we also confirmed the specificity of this link by controlling for potential demographic and ideological confounds. In a final study (N = 1,598), instrumental harm was shown as mediating the link between a pro-scientific attitude and support for animal experimentation.

How Risk Signaling Influences Binge Drinking Impression Formation: An Evolutionary Experimental Approach.

Background. Evolutionary theory-driven alcohol prevention programs for adolescents are lacking. This study introduced a binge drinking impression formation paradigm to test whether emphasizing sexual dysfunction induced by alcohol abuse lowers positive attitudes and expectancies related to binge drinking when compared with cognitive or long-term health consequences. Method. In a between-subjects experiment, 269 French high school students (age, M = 15.94, SD = 0.93, 63.20% women) watched professional-quality videos emphasizing sexual impotence (n = 60), cognitive impairment (n = 72), or long-term effects (cancer, cardiovascular disease, n = 68) induced by alcohol and then had to evaluate a drinking scene. We predicted that the video on impotence would be the most impactful when compared with the other videos. Results. Results showed that women evaluated the target as less attractive after viewing the cognitive video compared with the video on impotence. Men were more willing to play sports against the target after viewing the cognitive video, compared with the video on impotence. Conclusions. These results showed that evolutionary meaning might shape impressions formed by participants depending on the context. This study calls for further replications using the same design and materials.

The Early Impact of the COVID-19 Lockdown on Stress and Addictive Behaviors in an Alcohol-Consuming Student Population in France.

Background: This study evaluated factors linked with perceived stress related to the COVID-19 pandemic and lockdown and addictive behaviors prior to and during lockdown in a sample of students who indicated engaging in alcohol consumption behaviors before lockdown. Methods: Cross-sectional study. French students from four universities participated in this study, and 2,760 students reported alcohol use. During the first week of lockdown, students reported their perceived levels of stress regarding COVID-19. Substance use and addictive behaviors were reported before and during lockdown, and media exposure, demographical, living conditions, and environmental stressors were reported during lockdown. Results: Women reported greater levels of stress (95% CI: 1.18 to 1.93, p < 0.001). Highly-stressed students also report less social support (95% CI: -1.04 to -0.39, p < 0.001) and were more likely to worry about the lockdown (95% CI: 0.27 to -0.65, p < 0.001). Alcohol-related problemswere more prevalent among the most stressed students (95% CI: 0.02 to 0.09, p = 0.004) as well as eating problems (95% CI: 0.04 to 0.36, p = 0.016) and problematic internet use (95% CI, 0.06 to 0.14, p < 0.001). Students reporting the highest levels of stress also indicated more compulsive eating during the previous seven days (95% CI, 0.21 to 1.19, p = 0.005). Conclusions: The level of stress was strongly related to four categories of variables: (i) intrinsic characteristics, (ii) addictive behaviors before lockdown, (iii) lockdown-specific conditions, and (iv) addictive behaviors during the lockdown. Several variables linked to COVID-19 were not directly linked with perceived stress, while perceived stress was found to correlate with daily life organization-related uncertainty and anticipated consequences of lockdown. Importantly, social support seems to be a protective factor on high level of stress.

COVID-19 pandemic lockdown and problematic eating behaviors in a student population.

BACKGROUND AND AIMS: Since mid-March 2020, over 3 billion people have been confined as a result of the COVID-19 pandemic. Problematic eating behaviors are likely to be impacted by the pandemic through multiple pathways. This study examined the relationships between stress related to lockdown measures and binge eating and dietary restriction in a population of French students during the first week of confinement. METHODS: A sample of undergraduate students (N = 5,738) completed an online questionnaire 7 days after lockdown measures were introduced. The survey comprised variables related to lockdown measures and the COVID-19-pandemic, mood, stress, body image, binge eating and dietary restriction during the past 7 days, as well as intent to binge eat and restrict in the following 15 days. RESULTS: Stress related to the lockdown was associated with greater likelihood of binge eating and dietary restriction over the past week and intentions to binge eat and restrict over the next 15 days. Greater exposure to COVID-19-related media was associated with increased eating restriction over the past week. Binge eating and restriction (past and intentions) were associated with established risk factors, including female gender, low impulse regulation, high body dissatisfaction, and having a concurrent probable eating disorder. DISCUSSION AND CONCLUSION: The higher the stress related to the first week of confinement, the higher the risk of problematic eating behaviors among students, particularly those characterized by eating-related concerns. Screening for risk factors and providing targeted interventions might help decrease problematic eating behaviors among those who are most vulnerable.

Self-Regulation Failure Reduces the Effect Alcohol Portrayals in Movies on Indirect Attitudes toward Alcohol.

We investigated the cognitive mechanisms underlying change in implicit cognitions following exposure to alcohol portrayals. More precisely, we tested in an experimental study whether this change depends on controlled or automatic processes by putting participants in a state of self-regulatory fatigue prior to being exposed to alcohol portrayals. Ninety participants were randomly assigned to a 2 (attitude measure: before vs after) × 2 (alcohol portrayal: yes vs no) × 2 (ego depletion: yes vs no) mixed design to assess whether the effects of alcohol portrayals affected cognitive resources. It was hypothesized that alcohol portrayals would have more of an impact on participants submitted to an ego-depletion task. We found a change in attitudes toward alcohol only for participants that had been exposed to alcohol portrayals, and who had not been cognitively depleted. These results suggest that these changes rely on controlled, resource-dependent processes rather than on purely associative and automatic processes. Implications regarding alcohol advertising effects on public health are discussed.

An Evolutionary Approach to Binge Drinking Impression Formation: A Cross-Cultural Comparison Between France and Peru.

Evolutionary medicine proposes studying alcohol use and abuse through the lens of modern evolutionary theory. This study ( https://osf.io/p48 uw/) follows this approach and uses an evolutionary framework to predict how young adults (18-35 years old) form impression of a binge drinker. We predicted that displaying sexual dysfunctions (short-term risk) in a binge drinking video would negatively influence attitudes and expectations of a target when compared to cognitive (short-term risk) or long-term deficits. In the following studies, we use a Zahavian framework to understand and influence impression formation of a male binge drinker among women (intersexual selection) and men (intrasexual competition) participants in a subsequent task. Via a randomized experimental online study in France (N = 177, M = 23.39 [4.91], 43.50% men) and a preregistered conceptual replication study in Peru (N = 176, M = 25.61 [4.76], 53.41% men), women exposed to a binge drinking video-describing sexual impotence after a binge drinking episode-tended to downgrade attractiveness evaluation of the binge drinker. However, male participants were not impacted by the different types of signals displayed in the videos. These results show that evolutionary theory could help us understand impression formation in binge drinking context and call for gender-specific health messages.

Do women expose themselves to more health-related risks in certain phases of the menstrual cycle? A meta-analytic review.

Researchers have increasingly examined the menstrual cycle as a potential source of day-to-day variation in women's cognitions, motivations, and behavior. Within this literature, several lines of research have examined the impact of the menstrual cycle on women's engagement in activities that could negatively affect their health (alcohol and tobacco consumption, sexual behavior, risk recognition). However, findings have been mixed, leaving it unclear whether women may expose themselves to more health-related risks during certain phases of the cycle. We conducted a meta-analysis of 22 published and four unpublished studies (N = 7529, https://osf.io/xr37j/). The meta-analysis revealed shifts across the menstrual cycle in women's sexual behavior with others and risk recognition (higher in ovulatory phase), whereas there was no consistent pattern of difference for alcohol and cigarette consumption. These findings help to clarify the proximate physiological and evolutionary mechanisms underlying women's health-related risk-taking and may inform new interventions.

Immediate and 15-Week Correlates of Individual Commitment to a "Green Monday" National Campaign Fostering Weekly Substitution of Meat and Fish by Other Nutrients.

Promoting healthier and more sustainable diets by decreasing meat consumption represents a significant challenge in the Anthropocene epoch. However, data are scarce regarding the effects of nationwide meat reduction campaigns. We described and analyzed the correlates of a national campaign in France (called "Green Monday", GM) promoting the weekly substitution of meat and fish by other nutrients. Two cross-sectional online surveys were compared: a National Comparison sample (NC) of the French general population and a self-selected sample of participants who registered for the Green Monday campaign. A follow-up study was carried out in the GM sample, in which participants were asked during 15 weeks whether or not they had substituted meat and fish. There were 2005 participants aged 18-95 (47.7% females) in the NC sample and 24,507 participants aged 18-95 (77.5% females) in the GM sample. One month after the beginning of the campaign, 51.2% of the respondents reported they had heard about Green Monday in the NC sample, and 10.5% indicated they had already started to apply Green Monday. Logistic regression analysis showed that compared to the NC sample, participants belonging to the GM sample displayed a higher rate of females, Odds Ratio (OR) = 4.26, 95% Confidence Interval (CI): 3.86-4.71, were more educated, OR = 1.32, 95% CI: 1.28-1.36, had higher self-rated affluence, OR = 1.50, 95% CI: 1.42-1.58 and the size of their vegetarian network was greater, OR = 1.50, 95% CI: 1.41-1.58. They reported a slightly higher frequency of meat consumption, OR = 1.05, 95% CI: 1.01-1.10, while their frequency of fish consumption was lower, OR = 0.81, 95% CI: 0.76-0.87. Finally, the personality dimension Openness was more strongly endorsed by participants in the GM sample, OR = 1.79, 95% CI: 1.65-1.93. A multiple regression analysis indicated that Openness also predicted the number of participation weeks in the GM Sample (beta = 0.03, p < 0.009). In conclusion, specific demographic and personality profiles were more responsive to the national campaign, which could inform and help to shape future actions aiming at changing food habits.

How alcohol advertising and sponsorship works: Effects through indirect measures.

INTRODUCTION AND AIMS: We tested whether incidental exposure to alcohol marketing messages in sporting events: (i) influenced automatic evaluation of brands and alcohol in general; and (ii) if these processes occur through deliberative (conscious) or non-conscious processes. DESIGN AND METHODS: Using an experimental design, participants watched a sport event containing: (i) a prototypical alcohol brand; (ii) a brand unrelated to alcohol; or (iii) a non-prototypical alcohol brand. One hundred and nine participants were randomly assigned to either a cognitively depleting task to impair motivation for effortful conscious processing before watching the excerpt, or a control task. We measured indirect (implicit) and direct (explicit) attitudes toward alcohol and brands, and self-report measures assessing affective response toward the event, involvement in processing the message and identifications toward the playing teams. RESULTS: We found a positive main effect of incidental exposure to alcohol brands on indirect measures of attitudes toward alcohol as well as the specific brand. No effect of cognitive fatigue on indirect measure toward brands and alcohol was observed. DISCUSSION AND CONCLUSIONS: Incidental exposure to alcohol marketing messages appear to impact indirect measures of attitudes toward the brand and alcohol in general, and seems to rely on non-conscious automatic processes.

Influence of authoritarianism, vagal tone and mental fatigue on obedience to authority.

Recent research suggests that obedience in the Milgram paradigm is underpinned by stress vulnerability and inhibitory control over pain sharing. Because self-regulatory fatigue (SRF) induction is a suited method to investigate the influence of inhibitory control on behaviour, participants (n = 99) were randomly assigned to a High vs. Low self-regulatory condition. Heart rate variability (HRV, a biomarker of stress vulnerability) was collected during 5-min baseline and continuously during the experimental procedure. Prior to the experiment, participants completed an online survey assessing right-wing authoritarianism (RWA), a well-known predictor of obedience. Using the Immersive Video Milgram Obedience Experiment, we found (i) that lower resting HRV predicted higher destructive obedience, (ii) that low self-regulatory inhibition (induced by fatigue) reduced destructive obedience, (iii) that the well-established influence of RWA on destructive obedience was suppressed in the presence of SRF. Implications for future directions in obedience research are discussed.

Assessing Private and Public Need for Uniqueness: Validation of French Versions of the Need for Uniqueness (NfU) and Self-Attributed Need for Uniqueness (SANU) Scales.

Need for uniqueness represents the need for people to feel different and distinguish themselves from others. Two major scales exist that measure this need: the Need for Uniqueness scale (NfU; Snyder & Fromkin, 1977 ) and the Self-Attributed Need for Uniqueness scale (SANU; Lynn & Harris, 1997b ). We propose here a French version of both scales. Through a dual approach of exploratory and confirmatory factorial analyses, we investigated the scales' structure in student samples from two French-speaking countries (France and Switzerland, N = 1,348) as well as measures of internal and external validity. Both scales presented good psychometric properties in French. Additionally, we investigated differences between the scales, as literature suggests that the NfU relies mostly on public and risky displays of uniqueness, whereas the SANU focuses on private and more socially acceptable means to acquire a feeling of uniqueness. Differences arose in the links with several personality characteristics (emotionality, extraversion, agreeableness, sensation seeking, and self-consciousness), suggesting that the NfU corresponds rather to a need to demonstrate uniqueness through public displays and the SANU to a need to feel unique through more private means. We discuss implications for research and provide advice on choosing by the scale most appropriate to the researcher's aims.

Omega-3 supplements reduce self-reported physical aggression in healthy adults.

There is emerging evidence that Omega-3 polyunsaturated fatty acids (PUFA) supplements can decrease aggression. However, experimental studies with adults from non-specific populations are scarce. We hypothesized that Omega-3 supplements would decrease self-reported aggression among non-clinical participants. In a double-blind randomized trial, two groups of participants (N = 194) aged 18-45 from the general population followed a 6-weeks treatment with 638mg docosahexaenoic acid (DHA) and 772mg eicosapentaenoic acid (EPA) per day or the equivalent quantity of copra oil (placebo). Self-reported aggressiveness was measured at baseline and after the 6-week treatment period. Findings showed that Omega-3 supplements significantly decreased self-reported aggressiveness at the end of the 6-week period (d = 0.31). In conclusion, this experiment indicates that Omega-3 administration has beneficial effects in reducing aggression among the general population.

Controlled and implicit processes in evaluative conditioning on implicit and explicit attitudes toward alcohol and intentions to drink.

Since implicit attitudes (i.e. evaluations occurring outside of complete awareness) are highly predictive of alcohol consumption, we tested an evaluative learning procedure based on repeated pairing to a critical stimulus (i.e. alcohol, the CS) with a valenced stimulus (the US) in order to modify implicit attitudes (i.e. evaluative conditioning; EC). We hypothesized that manipulating the learning context to bolster implicit affect misattribution should strengthen EC effects on implicit attitudes toward alcohol, while encouraging deliberate processing of CS-US pairs, should strengthen EC effects on explicit attitudes. In our study (n=114 students) we manipulated whether CS-US pairs were presented simultaneously or sequentially. Recollective memory was estimated with a Process Dissociation Procedure. Both implicit and explicit attitudes were assessed immediately after the procedure. Behavioral intentions were measured directly after and one week after the EC-procedure. We found that EC with sequential presentation had a stronger impact on implicit and explicit measures and on purchase intentions immediately after the procedure and one week after. The present findings provide new evidence that (i) EC is an effective way to change implicit attitudes toward alcohol and (ii) evidence that EC may be better described by propositional rather than dual process accounts.

Video Games Exposure and Sexism in a Representative Sample of Adolescents.

Research has indicated that many video games are saturated with stereotypes of women and that these contents may cultivate sexism. The purpose of this study was to assess the relationship between video game exposure and sexism for the first time in a large and representative sample. Our aim was also to measure the strength of this association when two other significant and well-studied sources of sexism, television exposure and religiosity, were also included in a multivariate model. A representative sample of 13520 French youth aged 11-19 years completed a survey measuring weekly video game and television exposure, religiosity, and sexist attitudes toward women. Controlling for gender and socioeconomic level, results showed that video game exposure and religiosity were both related to sexism. Implications of these results for future research on sexism in video games are discussed.

Internet Gaming Disorder and Well-Being: A Scale Validation.

The overuse of online games is known to be inversely related to various indicators of well-being. This article validates the DSM-5 criteria of internet gaming disorder (IGD), and analyzes its links with five indicators of well-being: life satisfaction, loneliness, anxiety, depression, and academic performance in a French-speaking sample of 693 gamers. Exploratory and confirmatory factor analyses showed a one-factor structure of IGD criteria. The IGD scale showed satisfactory validity and reliability and was related in a consistent way with well-being measures. The IGD scale appears to be an appropriate measure to assess video game addiction and will contribute to increase the comparability of international research on video game addiction.