Does Putting Away Your Smartphone Make You Happier? The Effects of Restricting Digital Media and Social Media on Well-Being

Both scientists and laypeople have become increasingly concerned about smartphones, especially their associated digital media (e.g., email, news, gaming, and dating apps) and social media (e.g., Facebook, Instagram, Snapchat). Recent correlational research links substantial declines in Gen Z well-being to digital and social media use, yet other work suggests the effects are small and unnoteworthy. To further disentangle correlation from causation and better elucidate the strength and direction of effects, we conducted a pre-registered 8-day experimental deprivation study with Gen Z individuals (N = 338). Participants were randomly assigned to one of four conditions: (1) restrict digital media use, (2) restrict social media use, (3) restrict water use (active control), or (4) restrict nothing (measurement-only control). Relative to controls, participants restricting digital media reported a variety of benefits, including higher life satisfaction, mindfulness, autonomy, competence, and self-esteem, and reduced loneliness and stress. In contrast, those assigned to restrict social media reported relatively few benefits (increased mindfulness) and even some costs (more negative emotion).

Examining the Direction of Effects Between COVID-19 Experiences, General Well-Being, Social Media Engagement, and Insomnia Symptoms Among University Students

The present longitudinal study assessed the direction of effects between COVID-19 experiences, general well-being, socio-emotional motives for online communication, problematic social media use, and insomnia symptoms, among a sample of emerging adults at university. Participants ( N = 619; 64% female; 66% White) completed an online survey 5 months apart during the COVID-19 pandemic. Results from an autoregressive cross-lagged model showed that poorer general well-being at baseline predicted greater endorsement of socio-emotional motives for online communication and higher insomnia symptoms over time. Negative COVID-19 experiences predicted higher social (but not emotional) motives for online communication. Lastly, insomnia symptoms and more problematic social media use predicted more negative COVID-19 experiences 5 months later (but not vice versa). Understanding the mechanisms of these associations will provide a better understanding of the factors that promote positive psychosocial functioning among emerging adults during the current COVID-19 pandemic and may inform psychosocial adjustment during future pandemics.

Autonomy and loneliness – longitudinal within- and between-person associations among Swedish older adults

Objectives. Loneliness is an important risk factor for mental and physical health over the lifespan. So far, too little is known about psychosocial predictors and consequences of loneliness apart from social network characteristics. One important factor which may both prevent from, but also be affected by loneliness, is perceived autonomy. Method. In the present study, we investigated the longitudinal association of loneliness and autonomy over four years among participants of the Swedish HEARTS study (n = 5,718, age 60-66 at baseline). We used a latent curve model with structured residuals, which distinguishes within- and between person associations and includes cross-lagged parameters. Results. Between persons, higher levels of autonomy and baseline were associated with lower levels of loneliness, and increases in autonomy were associated with decreases in loneliness. When individuals felt more autonomous than usual, they also reported less loneliness. However, feeling more autonomous than usual was not associated with increases in loneliness or vice versa. Conclusion. Our findings show that low autonomy and high loneliness are related crosssectionally and longitudinally, as well as within and between persons, but the direction of effects is unclear. More research is needed to understand the development of this association over the lifespan.

Cis-regulatory evolution spotlights species differences in the adaptive potential of gene expression plasticity

Phenotypic plasticity is the variation in phenotype that a single genotype can produce in different environments and, as such, is an important component of individual fitness. However, whether the effect of new mutations, and hence evolution, depends on the direction of plasticity remains controversial. Here, we identify the cis-acting modifications that have reshaped gene expression in response to dehydration stress in three Arabidopsis species. Our study shows that the direction of effects of most cis-regulatory variants differentiating the response between A. thaliana and the sister species A. lyrata and A. halleri depends on the direction of pre-existing plasticity in gene expression. A comparison of the rate of cis-acting variant accumulation in each lineage indicates that the selective forces driving adaptive evolution in gene expression favors regulatory changes that magnify the stress response in A. lyrata. The evolutionary constraints measured on the amino-acid sequence of these genes support this interpretation. In contrast, regulatory changes that mitigate the plastic response to stress evolved more frequently in A. halleri. Our results demonstrate that pre-existing plasticity may be a stepping stone for adaptation, but its selective remodeling differs between lineages.

Maternal feeding style and child weight status among Hispanic families with low-income levels: a longitudinal study of the direction of effects

Background The home environment is a central and modifiable influence on the development of childhood obesity. Evidence supports the central role of parents in shaping problematic child eating behaviors and excess weight. Most studies of feeding emphasize parent-driven influences without taking into account the child’s role in eating interactions. Few studies have addressed the bi-directional nature of feeding dynamics in studies of young children. Methods The goals of this study were: 1) to examine if parental feeding styles during preschool (4–5 years) predict child weight status at 7–9 years, and 2) to examine the direction of effects between parental feeding styles and child weight status over time. Participants were part of a larger longitudinal study of Hispanic Head Start families living in the West South Central United States. Data from mother/child dyads were collected at three time points: Time 1 (ages 4–5), Time 2 (ages 5 ½-6 ½), and at Time 3 (ages 7–9). Only data from the Times 1 and 3 were used in the current analyses. A total of 128 mothers and their children had data on all variables needed for the analyses. Assessments included parent-reported feeding styles, feeding practices, acculturation, child eating behaviors, and child height and weight. Hierarchical regression was used to examine the first aim; a cross-lagged panel analysis examined the second aim. Results An indulgent parental feeding style at ages 4–5 was associated with increased child BMI z-score at ages 7–9. Indulgent feeding significantly contributed to child BMI z-score beyond demographics, baseline child BMI z-score, parental acculturation, and child eating behaviors. Regarding the direction of effects in parental feeding interactions, the cross-lagged analyses showed that both indulgent feeding style and authoritative feeding style at Time 1 positively predicted child BMI z-scores at Time 3. Child effects were significant as well. Child BMI z-score at Time 1 positively predicted indulgent feeding and negatively predicted authoritarian feeding at Time 3. Conclusions Indulgent feeding should be addressed in future family-focused childhood obesity initiatives focused on young children and their parents.

Impact of increasing the availability of healthier vs. less-healthy food on food selection: a randomised laboratory experiment

Background Environmental cues shape behaviour, but few studies compare the impact of targeting healthier vs. less-healthy cues. One online study suggested greater impact on selection from increasing the number of less-healthy (vs. healthier) snacks. The current study aimed to: (1) extend the previous study by using physically-present snacks for immediate consumption; (2) explore responsiveness by socio-economic position; (3) investigate possible mediators (response inhibition, food appeal) of any socio-economic differences in selection. Methods In a between-subjects laboratory experiment UK adults (n = 417) were randomised according to their ID number (without blinding) to one of three ranges of options: Two healthier, two less-healthy [“Equal”] (n = 136); Six healthier, two less-healthy [“Increased Healthier”] (n = 143); Two healthier, six less-healthy [“Increased Less-Healthy”] (n = 138). Participants completed measures of response inhibition and food appeal, and selected a snack for immediate consumption from their allocated range. The primary outcome was selection of a healthier (over less-healthy) snack. Results The odds of selecting a less-healthy snack were 2.9 times higher (95%CIs:1.7,5.1) in the Increased Less-Healthy condition compared to the Equal condition. The odds of selecting a healthier snack were 2.5 times higher (95%CIs:1.5,4.1) in the Increased Healthier (vs. Equal) condition. There was no significant difference in the size of these effects (− 0.2; 95%CIs:-1.1,0.7). Findings were inconclusive with regard to interactions by education, but the direction of effects was consistent with potentially larger impact of the Increased Healthier condition on selection for higher-educated participants, and potentially larger impact of the Increased Less-Healthy condition for less-educated participants. Conclusions A greater impact from increasing the number of less-healthy (over healthier) foods was not replicated when selecting snacks for immediate consumption: both increased selections of the targeted foods with no evidence of a difference in effectiveness. The observed pattern of results suggested possible differential impact by education, albeit not statistically significant. If replicated in larger studies, this could suggest that removing less-healthy options has the potential to reduce health inequalities due to unhealthier diets. Conversely, adding healthier options could have the potential to increase these inequalities. Trial registration ISRCTN: ISRCTN34626166; 11/06/2018; Retrospectively registered.

Are Changes in Personality Traits and Alcohol Use Associated? A Cohort Study Among Young Swiss Men

Objective: It is well known that certain personality traits are associated with alcohol use. Because less is known about it, we wished to investigate whether changes in alcohol use were longitudinally associated with changes in personality and in which direction the influence or causation might flow.Methods: Data came from the self-reported questionnaire answers of 5,125 young men at two time points during the Cohort study on Substance Use Risk Factors (C-SURF). Their average ages were 20.0 and 25.4 years old at the first and second wave assessments, respectively. Four personality traits were measured: (a) aggression–hostility; (b) sociability; (c) neuroticism–anxiety; and (d) sensation seeking. Alcohol use was measured by volume (drinks per week) and binge drinking (about 60+ grams per occasion). Cross-lagged panel models and two-wave latent change score models were used.Results: Aggression–hostility, sensation seeking, and sociability were significantly and positively cross-sectionally associated with both alcohol use variables. Drinking volume and these three personality traits bidirectionally predicted each other. Binge drinking was bidirectionally associated with sensation-seeking only, whereas aggression–hostility and sociability only predicted binge drinking, but not vice versa. Changes in alcohol use were significantly positively associated with changes in aggression–hostility, sensation seeking, and sociability. Associations reached small Cohen's effect sizes for sociability and sensation seeking, but not for aggression–hostility. Associations with neuroticism–anxiety were mostly not significant.Conclusion: The direction of effects confirmed findings from other studies, and the association between changes in personality and alcohol use support the idea that prevention programs should simultaneously target both.

Impact of increasing the availability of healthier vs. less-healthy food on food selection: A randomised laboratory experiment

Background. Environmental cues shape behaviour, but few studies compare the impact of targeting healthier vs. less-healthy cues. One online study suggested greater impact on selection from increasing the number of less-healthy (vs. healthier) snacks. The current study aimed to: (1) extend the previous study by using physically-present snacks for immediate consumption; (2) explore responsiveness by socio-economic position; (3) investigate possible mediators (response inhibition, food appeal) of any socio-economic differences in selection. Methods. In a between-subjects laboratory experiment UK adults (n=417) were randomised according to their ID number (without blinding) to one of three ranges of options: Two healthier, two less-healthy [“Equal”] (n=136); Six healthier, two less-healthy [“Increased Healthier”] (n=143); Two healthier, six less-healthy [“Increased Less-Healthy”] (n=138). Participants completed measures of response inhibition and food appeal, and selected a snack for immediate consumption from their allocated range. The primary outcome was selection of a healthier (over less-healthy) snack.Results. The odds of selecting a less-healthy snack were 2.9 times higher (95%CIs:1.7,5.1) in the Increased Less-Healthy condition compared to the Equal condition. The odds of selecting a healthier snack were 2.5 times higher (95%CIs:1.5,4.1) in the Increased Healthier (vs. Equal) condition. There was no significant difference in the size of these effects (-0.2; 95%CIs:-1.1,0.7). Findings were inconclusive with regard to interactions by education, but the direction of effects was consistent with potentially larger impact of the Increased Healthier condition on selection for less-educated participants, and potentially larger impact of the Increased Less-Healthy condition for higher-educated participants. Conclusions. A greater impact from increasing the number of less-healthy (over healthier) foods was not replicated when selecting snacks for immediate consumption: both increased selections of the targeted foods with no evidence of a difference in effectiveness. The observed pattern of results suggested possible differential impact by education, albeit not statistically significant. If replicated in larger studies, this could suggest that removing less-healthy options has the potential to reduce health inequalities due to unhealthier diets. Conversely, adding healthier options could have the potential to increase these inequalities. Trial registration: Retrospectively registered on ISRCTN 11/06/2018 (https://doi.org/10.1186/ISRCTN34626166).

Mothers' and fathers' quantitative and qualitative parenting in relation to children's emotional adjustment: A between- and within-family investigation

This longitudinal study of Australian families (n = 1884, from age 6-12) examined how fathers' and mothers' quantitative involvement (time spent on childcare) and qualitative involvement (specific parenting behaviors) relate to children's emotional adjustment development. We used dynamic structural equation modeling to disentangle stable between-family differences from within-family fluctuations in qualitative parenting and emotional adjustment, allowing us to investigate the direction of effects between parents and children. Because fathers have been theorized to contribute uniquely to emotional adjustment development, we examined differences between mothers and fathers, and the interplay between parent- and child sex. We further examined whether between-family differences in quantitative involvement, operationalized as joint (total) and relative (one parent does more) involvement, predict qualitative parenting behaviors and emotional adjustment, and moderate the within-family interplay between them. Results revealed between-family correlations of qualitative involvement with emotional adjustment. Evidence for significant average within-family effects was limited to a parenting effect of maternal warmth, and several child effects, which indicated that emotional adjustment evokes changes in parenting. Parenting effects varied substantially across families however, especially for fathers. Between-family differences in quantitative involvement explained some of these differences. When joint quantitative involvement was higher, both parents engaged in more desirable qualitative parenting. When mothers were relatively more involved than fathers, fathers displayed less desirable qualitative parenting, and children were less well-adjusted. There was some limited evidence that within-family predictive effects were moderated by quantitative involvement, particularly relative involvement. These findings suggest that all family members benefit from a more equal childcare distribution.

Cis-regulatory evolution spotlights species differences in the adaptive potential of gene expression plasticity

Phenotypic plasticity is the variation in phenotype that a single genotype can produce in different environments and, as such, is an important component of individual fitness. However, whether the effect of new mutations, and hence evolution, depends on the direction of plasticity remains controversial. Here, we identify the cis-acting modifications that have reshaped gene expression in response to dehydration stress in three Arabidopsis species. Our study shows that the direction of effects of most cis-regulatory variants differentiating the response between A. thaliana and the sister species A. lyrata and A. halleri depends on the direction of pre-existing plasticity in gene expression. A comparison of the rate of cis-acting variant accumulation in each lineage indicates that the selective forces driving adaptive evolution in gene expression favors regulatory changes that magnify the stress response in A. lyrata. The evolutionary constraints measured on the amino-acid sequence of these genes support this interpretation. In contrast, regulatory changes that mitigate the plastic response to stress evolved more frequently in A. halleri. Our results demonstrate that pre-existing plasticity can be a stepping stone for adaptation, but its selective remodeling differs between lineages.