Gender differences in temperament: A meta-analysis

Proximal Processes and Contextual Factors Associated with Early Socio-emotional Competence Development

There is growing interest in child socio-emotional competence from parents, educators, employers and policy makers, with emphasis on developing it as early as possible. The aim of the present study was to examine contextual and proximal factors that influence socio-emotional competence development across the first five years of a child's life. We used data from 3200 mothers and their children drawn mostly from four major data collection waves (antenatal, 9 months, 2 years and 4.5 years) of the population-based longitudinal study, Growing Up in New Zealand. Regression analyses were carried out to identify the predictors of socio-emotional competence after controlling for demographics and prior score(s) of socio-emotional competence. We found that specific maternal behaviours, such as playing games and playing with toys with children, singing songs or telling stories to them, reading books with them, having rules around viewing TV, DVDs and videos, and praising children have a positive effect on socio-emotional competence. Parental relationship warmth and less family stress at 9 months also made positive contributions to socio-emotional competence at 9 months and 2 years. In contrast, attending childcare and having more siblings at home negatively predicted socio-emotional competence at 9 months. Mother's unemployment, living in neighbourhoods perceived as negative and being in contact with family and social services were negatively associated with concurrent socio-emotional competence at 2 years. Overall, more and/or stronger contemporaneous effects were found suggesting that negative effects of contextual factors may not have lasting impact on socio-emotional competence. In addition, the results showed that maternal behaviours need to be practised regularly to have positive impact on child's socio-emotional development.

A Systematic Review and New Analyses of the Gender-Equality Paradox

Some studies show that living conditions, such as economy, gender equality, and education, are associated with the magnitude of psychological sex differences. We systematically and quantitatively reviewed 54 articles and conducted new analyses on 27 meta-analyses and large-scale studies to investigate the association between living conditions and psychological sex differences. We found that sex differences in personality, verbal abilities, episodic memory, and negative emotions are more pronounced in countries with higher living conditions. In contrast, sex differences in sexual behavior, partner preferences, and math are smaller in countries with higher living conditions. We also observed that economic indicators of living conditions, such as gross domestic product, are most sensitive in predicting the magnitude of sex differences. Taken together, results indicate that more sex differences are larger, rather than smaller, in countries with higher living conditions. It should therefore be expected that the magnitude of most psychological sex differences will remain unchanged or become more pronounced with improvements in living conditions, such as economy, gender equality, and education.

A genetically informed longitudinal study of early-life temperament and childhood aggression

The present study examined the longitudinal associations between three dimensions of temperament - activity, affect-extraversion, and task orientation - and childhood aggression. Using 131 monozygotic and 173 dizygotic (86 same-sex) twin pairs from the Louisville Twin Study, we elucidated the ages, from 6 to 36 months, at which each temperament dimension began to correlate with aggression at age 7. We employed latent growth modeling to show that developmental increases (i.e., slopes) in activity were positively associated with aggression, whereas increases in affect-extraversion and task orientation were negatively associated with aggression. Genetically informed models revealed that correlations between temperament and aggression were primarily explained by common genetic variance, with nonshared environmental variance accounting for a small proportion of each correlation by 36 months. Genetic variance explained the correlations of the slopes of activity and task orientation with aggression. Nonshared environmental variance accounted for almost half of the correlation between the slopes of affect-extraversion and aggression. Exploratory analyses revealed quantitative sex differences in each temperament-aggression association. By establishing which dimensions of temperament correlate with aggression, as well as when and how they do so, our work informs the development of future child and family interventions for children at highest risk of aggression.

The Role of Emotion Dysregulation and Self-Esteem in the Relationships Between Parenting Styles and Adolescents' Impostor Feelings: A Multiple Mediation Model by Parent and Child Gender

The study probes the relationship between parenting styles and three adolescents' psychological outcome variables: impostor phenomenon, self-esteem, and emotion dysregulation. Using path analysis, it aimed at testing the mediating role played by the latter two variables in the association between parenting and adolescents' impostor feelings, while differentiating between maternal and paternal parenting effect in the context of the child's gender. The sample consisted of 103 adolescent males and 117 females whose mean age was 14.10 ± 1.53. The participants took part in an online survey, where they reported their parents' parenting styles and their psychological variables using battery of instruments. For mothers, authoritative parenting was directly associated among male adolescents and indirectly associated (via higher self-esteem) among female adolescents with lower impostor feelings. For fathers, a similar an indirect association via self-esteem was recorded solely among male adolescents. Emotion dysregulation was found to be uniquely related to authoritarian parenting among adolescent females and to permissive parenting among adolescent males. Respectively, these psychological variables mediated the relationships between parenting styles and adolescents' impostor feelings. The study contributes unique evidence for the role played by emotion dysregulation and self-esteem in explaining adolescents' impostor feelings, while considering the importance of parenting styles and parent-child gender.

The Relationship Between Intelligence and Personality Traits Differentiated by Gender in Spanish Adolescents

BACKGROUND/OBJECTIVES

Intelligence and personality are the most researched constructs in the scientific literature in the field of psychology. Also, the relationship between them has been studied, with controversial results. The present study examines the relationship between intelligence and personality, considering, on the one hand, the influence of gender and, on the other, the predictive capacity of intelligence for personality traits.

METHODS

The sample consisted of 1166 participants between 11 and 16 years old from the Canary Islands. The Big Five Personality Questionnaire for Children, Adolescents and Adults (MASK-5) and the Adaptive Test of General Intelligence (Matrices-TAI) were used. For the analysis, a quantitative approach with an ex post facto, cross-sectional design was used. The analysis was carried out with SPSS v.26 and Jamovi v.2.3.21.

RESULTS

The findings revealed non-significant gender differences in intelligence and personality. The regression model between the two constructs was only significant for the dimension consciousness (F(1,1164) = 3.906, p = 0.048; ɳp2 = 0.003) and its facet perseverance (F(1,1164) = 5.953, p = 0.015; ɳp2 = 0.005), but the effect size was small in both cases. When considering girls and boys separately, the model was not significant for boys, whereas for girls, the dimension consciousness (F(1,595) = 6.148, p = 0.013; ɳp2 = 0.010) and its facet achievement (F(1,595) = 8.227, p = 0.004; ɳp2 = 0.014), as well as the facet humility (agreeableness) (F(1,595) = 6.472, p = 0.011; ɳp2 = 0.011), were significant, but again, with small effect sizes. Nevertheless, low observed power results for the whole sample and the boys sample suggest the need to increase the sample size.

CONCLUSIONS

These findings are discussed, and future lines of research in this field of study are proposed.

Acute effect of aerobic exercise on inhibitory control and task-related heart rate variability in preadolescent children

OBJECTIVES

To investigate whether a single session of aerobic exercise improves inhibitory control in preadolescent children and whether this effect is mediated by changes in parasympathetic activity.

DESIGN

In this experimental study, an intervention and control group were pair-matched by age, sex and moderate-to-vigorous physical activity.

METHOD

114 participants either completed a 20 min moderately-intense exercise bout on a cycling ergometer or watched a 20 min video. Prior to and after these conditions, a computer-based Stroop task was administered. During the cognitive task, heart rate variability (HRV) was measured using electrocardiography.

RESULTS

Path-analyses did not support an association between group and posttest accuracy on the Stroop task, while controlling for pretest scores. However, the intervention group had lower time-domain based HRV at posttest. The examination of mediation models revealed a moderation by sex, as the relation of lower time-domain based HRV with higher accuracy on both congruent and incongruent trials of the Stroop task was observed in girls only.

CONCLUSION

A single aerobic exercise session does not necessarily improve inhibitory control in preadolescent children. However, the manipulation of the autonomic state towards a parasympathetic withdrawal has the potential to alter inhibitory control in girls in particular.

The Iowa Gambling Task: Men and Women Perform Differently. A Meta-analysis

The Iowa Gambling Task (IGT) was designed to assess decision-making under conditions of complexity and uncertainty; it is currently one of the most widely used tests to assess decision-making in both experimental and clinical settings. In the original version of the task, participants are given a loan of play money and four decks of cards and are asked to maximize profits. Although any single card unpredictably yields wins/losses, variations in frequency and size of gains/losses ultimately make two decks more advantageous in the long term. Several studies have previously suggested that there may be a sex-related difference in IGT performance. Thus, the present study aimed to explore and quantify sex differences in IGT performance by pooling the results of 110 studies. The meta-analysis revealed that males tend to perform better than females on the classic 100-trial IGT (UMD = 3.381; p < 0.001). Furthermore, the significant heterogeneity observed suggests high variability in the results obtained by individual studies. Results were not affected by publication bias or other moderators. Factors that may contribute to differences in male and female performance are discussed, such as functional sex-related asymmetries in the ventromedial prefrontal cortex and amygdala, as well as differences in sensitivity to wins/losses.

Data retention in awake infant fMRI: Lessons from more than 750 scanning sessions

Functional magnetic resonance imaging (fMRI) in awake infants has the potential to reveal how the early developing brain gives rise to cognition and behavior. However, awake infant fMRI poses significant methodological challenges that have hampered wider adoption. The present work takes stock after the collection of a substantial amount of awake infant fMRI data across multiple studies from two labs at different institutions. We leveraged these data to glean insights on participant recruitment, experimental design, and data acquisition that could be useful to consider for future studies. Across 766 awake infant fMRI sessions, we explored the factors that influenced how much usable data were obtained per session (average of 9 minutes). The age of an infant predicted whether they would successfully enter the scanner (younger was more likely) and, if they did enter, the number of minutes of functional data retained after preprocessing. The amount of functional data retained was also influenced by assigned sex (female more), experimental paradigm (movies better than blocks and events), and stimulus content (social better than abstract). In addition, we assessed the value of attempting to collect multiple experiments per session, an approach that yielded more than one usable experiment averaging across all sessions (including those with no data). Although any given scan is unpredictable, these findings support the feasibility of awake infant fMRI and suggest practices to optimize future research.

Exploring Gendered Perspectives on Personality Traits and Entrepreneurial Performance in Lebanon during the COVID-19 Crisis

We investigate the impact of gendered personality traits on the entrepreneurial performance of male and female entrepreneurs in Lebanon during the COVID-19 crisis. Using the Big Five personality model and survey data from 500 entrepreneurs, the research examines how traits such as agreeableness, conscientiousness, neuroticism, extraversion, and openness to experience influence business outcomes in high-pressure environments. The findings reveal that agreeableness and neuroticism benefit female entrepreneurs more than males during crises, while conscientiousness significantly deteriorates the financial performance of female entrepreneurs. Extraversion and openness exhibit no differential effects on financial performance by gender. By examining the interplay between gendered personality traits and entrepreneurial performance within the unique context of Lebanon during the COVID-19 pandemic, this study contributes novel insights to the literature. It challenges traditional views on gendered advantages in entrepreneurship, particularly by highlighting the underexplored positive implications of neuroticism and the nuanced role of agreeableness. These findings provide actionable insights for policymakers and support organisations. Specifically, fostering relational skills such as agreeableness and leveraging neuroticism's sensitivity for proactive crisis management can enhance entrepreneurial resilience. Additionally, training programmes aimed at addressing the rigidity associated with conscientiousness can help entrepreneurs adapt more effectively to volatile environments. By tailoring interventions to gender-specific personality dynamics, these insights can strengthen entrepreneurial ecosystems and improve resilience in times of uncertainty.

Heterogeneity in Developmental Trajectories of Internalizing and Externalizing Symptomatology: Associations with Risk and Protective Factors

Among a large sample of youth (9-10 years old at baseline) from the Adolescent Brain Cognitive Development (ABCD) Study® (n = 11,661) we modeled trajectories of psychopathology over three years and associated risk and protective factors. Growth mixture modeling characterized latent classes with distinct psychopathology trajectories. Results indicated four different internalizing trajectories: a high-decreasing class, a moderate-decreasing class, a moderate-increasing class, and a low-stable class. There were also four externalizing trajectories: a moderate-decreasing class, a high-decreasing class, a moderate-increasing class, and a low-decreasing class. We used parallel process growth analysis to examine the co-development of internalizing and externalizing symptoms and characterized five trajectory classes with distinct patterns of co-development. These classes were differentially associated with negative life events, neighborhood safety, and parental acceptance. Together, the findings characterize general developmental patterns of psychopathology, quantify the proportion of youth that follow each pattern, and identify key predictors that discriminate these patterns.

Convergence and divergence of empathic concern and empathic happiness in early childhood: Evidence from young infants and children

While most research focused on empathic responses to negative emotions, little is known about empathy to positive emotions. We aimed to bridge this gap by examining infants' and children's empathic responses to distress and happiness, while differentiating between cognitive and emotional empathy. We conducted three studies with N = 119 3-month-old infants; N = 169 10-19 months-old infants; and N = 61 24-60 months-old children (all Jewish-Israeli). Empathy was measured using experimenter simulations (studies 1 and 3) or peer-video (study 2). All studies showed that cognitive empathy to positive and negative emotions converged (small-medium effect size), but not so for emotional empathy. This suggests that understanding others' emotions is independent of emotion valence, while the ability to share in another's emotion is valence-specific.

Gender Differences in Variability in Intimate Relationship Satisfaction: A Secondary Analysis and Meta-Analysis

There is a long-standing interest in gender differences in satisfaction in intimate relationships. Whereas prior research has focused on gender differences in central tendency (i.e., means), we conducted two studies - a secondary analysis of data from a probability sample of Australian married couples and a meta-analysis - to examine gender differences in variability (i.e., variances). We hypothesized that compared to males, females would demonstrate greater variability in intimate relationship satisfaction (i.e., greater female variability hypothesis), particularly at lower levels of relationship satisfaction. Results from a secondary analysis of data from 2,711 married couples in the Household, Income and Labour Dynamics in Australia (HILDA) survey and from a meta-analysis of 20 years of research (k = 171, N = 84,976), including independent samples from 33 countries, indicated that relative to males, females reported greater variability in relationship satisfaction. Obtained effect sizes (female-to-male variance ratios [VRs] of 1.42 for the HILDA sample and 1.19 for the meta-analysis) were larger than proposed cutoffs for meaningful group differences in variability. Analysis of tail ratios (ratios of the relative proportion of females divided by the relative proportion of males in the distributional tail regions) in the HILDA sample indicated that gender differences in variability were greater at lower (versus higher) levels of satisfaction. Findings support the greater female variability hypothesis and suggest that by focusing only on gender differences in means, the existing literature has underestimated gender differences in intimate relationship satisfaction.

Maturational changes in frontal EEG alpha and theta activity from infancy into early childhood and the relation with self-regulation in boys and girls

There is increasing interest in examining the development of frontal EEG power in relation to self-regulation in early childhood. However, the majority of previous studies solely focuses on the brain's alpha rhythm and little is known about the differences between young boys and girls. The aim of the current study was therefore to gain more insight into the neural mechanisms involved in the emergence of self-regulation. The sample consisted of 442 children and data were collected at approximately 5 months, 10 months, and around 3 years of age. Latent growth curve models indicated that,while the neurobiological foundations of self-regulation are established during infancy,it is the maturation of the frontal alpha rhythm that contributes to variations in both observed and parent-reported self-regulation. In addition, it appears that boys might have a greater reliance on external regulation than girls during early childhood, as evident by higher scores of girls on both measures of self-regulation. More insight into the role of external regulators in brain maturation can help to implement interventions aimed at establishing bottom-up self-regulatory skills early in life, in order to provide the necessary foundations for the emergence of top-down self-regulatory skills in the preschool period.

Sociability across Eastern-Western cultures: Is it the same underlying construct?

In this study, we examined cross-cultural differences in sociability, a core personality facet of the higher order extraversion trait, which has been reported at lower levels in Eastern versus Western cultures several decades ago. Up until now, however, East-West cultural comparisons on the Western-defined construct of sociability have been limited, despite the extensive research published on extraversion indicating that this personality dimension is globally relevant across cultures. Following current practices, we first assessed for measurement invariance (MI) on the Cheek and Buss sociability scale between Chinese (n = 816, 47.2% male, M = 18.51 years, SD = 1.26 years) and Canadian (n = 995, 30.8% male, M = 19.62 years, SD = 1.25 years) young adult samples to ensure any comparisons would be valid and meaningful. Results from a multigroup confirmatory factor analysis (exact invariance) showed that there was measurement non-invariance at the scalar level in the sociability construct across country and country by sex, and the newer alignment method (approximate invariance) confirmed these results, suggesting that mean level comparisons of sociability were biased and noninformative. Our findings indicated that although a few of the higher-level personality dimensions such as extraversion are considered universal, the facets underlying their meaning, like sociability, are not as clearly delineated between cultures. Alongside the present-day pursuit of understanding personality across cultures through an indigenous measurement lens in tandem with the notion of universality, researchers should also consider narrowing their focus onto lower-level facets, each of which is likely to be uniquely embedded into a cultural context.

Longitudinal predictors for internalizing and externalizing symptomatology at age 4: KUNO-Kids cohort study

Introduction

Numerous early-life risk factors are thought to significantly contribute to the development of psychological problems in toddlerhood. However, these factors have seldom been investigated concomitantly and longitudinally, and few studies include both mothers and fathers. This study examines the longitudinal impact of early environmental, parental, and child-specific risk factors on children's internalizing and externalizing symptomatology at age 4.

Methods

Families were recruited from a perinatal center at birth and completed self-report questionnaires at birth, 4 weeks postpartum, 6 months postpartum, and annually thereafter. The final population-based sample consisted of n = 560 mothers (and fathers) who gave birth after June 2015, with children who turned 4 years old before March 31, 2021. The primary outcomes, children's internalizing and externalizing symptomatology at age 4, were measured using the Strengthsand Difficulties Questionnaire. Linear mixed effect models were used to estimate growth curves for predictors between 4 weeks and 4 years postpartum, which were subsequently entered into multivariable linear regressions to predict internalizing and externalizing symptomatology at age 4.

Results

The study identified several key risk factors: environmental (lack of social support, lower parental education, male sex), parental (poor parental mental health, increased parenting stress, parental sleep difficulties) and child-specific (children's low physical health, children's reduced sleep quality, temperament).

Discussion

The findings underscore that most identified risk factors are related to children's temperament, mental and physical health of parents, their experienced stress, and families' social support networks. These insights highlight the importance of targeted interventions focusing on improving parental mental health, reducing stress, and enhancing social support to mitigate early-life psychological problems in children.

Emotion-related Processes Between Parents and Adolescents: Evidence for Bidirectional Effects over Time

Parent emotion socialization has long been studied in relation to children's socioemotional adjustment. Little attention has been paid to how parents' socialization responses are shaped by youth characteristics over time, such as emotional lability. The present study explored the mutual influence between parent emotion socialization and adolescent emotional lability. Participants were 87 adolescents (M = 14.23  years old, SD = .50; 50 girls) and their parents, who completed questionnaires at three time points from 8th grade through 10th grade. Hierarchical linear modeling demonstrated mutual influences between parent emotion socialization and adolescent emotional lability, with relations moderated by adolescent gender. Increases in parents' reward of negative emotion predicted decreased emotional lability in girls. Parents' increased magnification of negative emotions corresponded to decreased emotional lability in boys. Boys' increases in emotional lability predicted decreased parental magnification of negative emotions over time. Increases in parents' magnification of negative emotions predicted increased emotional lability in girls. Girls' increases in emotional lability corresponded to increased parental magnification over time. There were no longitudinal effects of adolescent emotional lability on parents' reward, override, and punishment of negative emotions. Future directions and clinical applications are discussed.

Child temperament and trajectories of student-teacher relationships quality

This study aimed to examine the associations between child temperament and trajectories of the three dimensions of the student-teacher relationship (Closeness, Conflict, and Dependency) during elementary school. Latent class growth analyses conducted among 744 French-Canadian students recruited between 2008 and 2010 (46.8% girls; M age = 8.39; 90.9% White; 49.7% with externalizing behavior problems) revealed four Closeness trajectories and three Conflict trajectories, but no significant variability between children in mean levels of change in Dependency. Surgency-Extraversion and Effortful control were associated with specific trajectories of Closeness and Conflict. Effortful control was also associated with cross-sectional assessments of Dependency. These results suggest that temperament is a useful construct in understanding developmental patterns of the student-teacher relationship across the elementary school years.

Prenatal Cannabis Exposure and Executive Function and Aggressive Behavior at Age 5 Years

Importance

Cannabis use during pregnancy is increasingly common in the US and may affect the development and behavior of preschool-aged children.

Objective

To prospectively investigate the association of prenatal cannabis exposure with executive function and aggressive behavior at age 5 years.

Design, Setting, Participants

This cohort study was conducted from 2016 through 2020. Data analysis was conducted from 2022 through 2024. Patients aged 16 through 50 years who were able to communicate in English and intended to deliver at the Ohio State University Wexner Medical Center were enrolled in a pregnancy research repository. Participants (n = 355) who gave consent for future contact and whose child(ren) was presumed to be alive were invited to participate again at child age 5 years (children born May 25, 2010, through February 7, 2016) and 250 children participated (70%).

Exposure

Cannabis exposure was measured prospectively by urine toxicology, maternal self-report, and obstetric record abstraction.

Main Outcomes and Measures

Executive function and aggressive behavior, measured via multimodal assessment by staff masked to exposure status. Outcomes were chosen a priori.

Results

Of 250 children, 80 were exposed to cannabis (32%). Use of tobacco, other drugs, and alcohol during pregnancy was common (22% to 39% each). Most families were living in poverty. There were 155 children who were Black/African American, non-Hispanic (62%); 11 were Hispanic (4%); 34 indicated more than one race or another race, non-Hispanic (14%); and 50 were White, non-Hispanic (20%). Age-corrected standard scores for children's attention and inhibitory control (National Institutes of Health Toolbox) were about 0.4 SDs lower for those exposed to cannabis compared with unexposed (β = -6.1 points; 95% CI, -10.8 to -1.4), following propensity score weighting and adjustment for confounders. Exposed children also exhibited poorer task-based planning ability and more observed aggression. Caregiver ratings of executive function and behavior and laboratory assessments of other aspects of executive functioning showed no differences by exposure status.

Conclusions and Relevance

Results from this contemporary US cohort where prenatal cannabis exposure was common and indicated that exposed children exhibited some differences in aspects of executive function and behavior relevant to long-term academic success and adaptive functioning. These results may be considered in refining clinical recommendations regarding cannabis use during pregnancy.

How do fathers' educational level contribute to children's school problems? Overparenting and children's gender and surgency in a moderated mediation model

This study aims to investigate (a) the mediating role of overparenting between father's educational level and children's school problems, and (b) the joint moderating role of children's gender and surgency in the indirect relationship between father's educational level and school problems. Participants were 203 school children, 96 boys (47.3%) and 107 girls (52.7%), aged 7-8 years (M = 92.42 months, SD = 3.52). Fathers reported their educational level, age and employment status and their children's gender and number of siblings, as well as their overparenting behaviors by Anticipatory Problem Solving (APS) scale. Teachers informed children's school problems by the Behavior Assessment System for Children (BASC T-2). Parents together informed their children's surgency levels by a subscale of Children's Behavior Questionnaire (CBQ). Results showed that, in girls, the father's educational level was negatively related to the child's school problems via overparenting behaviors, controlling the number of siblings and father's age and employment status. However, among boys, fathers' overparenting protect their shy sons from the risk of a low educational level for school problems. These findings highlight the relevance of considering the gender and surgency to a better understanding of the effects of contextual factors on children's outcomes.

Absent or Hidden? Hyperactivity in Females With ADHD

OBJECTIVE

This study aimed to objectively assess signs of hyperactivity in adults suspected of having ADHD, addressing potential sex bias in diagnosis.

METHODS

About 13,179 (49% female) adults with an average age of 33 years with ADHD and 1,910 (41% female) adults with an average age of 36 years without ADHD were included. Motor activity was measured using the Quantified Behavioral Test, analyzing "provoked," and "basal" activity. Sex by group differences were analyzed using analysis of variance.

RESULTS

Results showed significant ADHD effects on the basal and provoked activity measures, while sex effects were only notable for provoked activity. Males, irrespective of diagnosis, exhibited higher provoked activity than females, while both sexes with ADHD displayed approximately twice the basal activity and about three times the provoked activity compared to their respective sex controls.

CONCLUSION

These findings suggest that females with ADHD suffer equally from hyperactivity compared to males, challenging the notion of a sex-dependent presentation of hyperactivity. This may lead to more accurate and timely diagnoses, reducing ADHD-related burdens and comorbidities in females.

Is temperament associated with academic school readiness in children born very preterm?

Research Findings

Temperament, which can be assessed as early as three months, is associated with school readiness and later academic achievement in children born full term. Although children born preterm demonstrate a dysregulated temperament and are at significant risk for lower school readiness, we found no studies investigating whether early temperament is associated with school readiness in this at-risk population. Investigating whether temperament is a precursor of academic risk in preterm children can facilitate early identification and possible intervention efforts. We explored the association of negative affect, surgency, and regulation/effortful control temperament ratings collected at 3-months and 3-years corrected ages with school readiness at 3-years corrected age in children born very preterm. Participants included 297 children born very preterm (53.9% male). After controlling for key covariates, Positive Affectivity/Surgency ratings at 3-months were significantly associated with the Bracken Basic Concept Scale - School Readiness composite score, and Effortful Control ratings at 3-years were associated with Adaptive Behavior Assessment System, Third Edition (ABAS-3) Functional Pre-Academics ratings.

Practice or Policy

These findings may enhance the ability to identify premature children at risk for difficulties at school entry early.

When Being Bad Feels Good: A Systematic Review of the Relationship Between Positive Emotion and Antisocial Behavior in Children and Adolescents

Antisocial behavior in childhood and adolescence is associated with poor family and peer relationships, and a higher risk of mental and physical health problems in adulthood, as well as criminality. Emotions play a central role in children's moral development, but most research has focused on negative emotions (e.g., shame and guilt), in relation to childhood antisocial behavior. Research in adult populations indicates that positive emotions experienced in anticipation of, during, and after antisocial acts may play an important role in the development and maintenance of antisocial behavior. Consequently, this systematic review aimed to investigate the relationship between positive emotion and antisocial behavior in children and adolescents. A systematic search in five databases was conducted, yielding 52 studies that used different methodological approaches, samples, designs and methods to examine this association. Results provide support for a positive relationship between positive emotion and antisocial behavior across community, forensic and clinical samples. This link appeared to be stronger for younger children, boys, and for children high in social dominance, callous-unemotional or sensation-seeking traits. Results suggested that positive affect may act in concert with negative emotion, cognitive, personality and motivational processes, as well as peer influences to determine the initiation and maintenance of antisocial behavior. This review presents directions for future research and discusses the implications of findings for prevention and intervention programs for youth with antisocial behavior.

Association between number of confidants and adolescent anxiety/depression: a school-based study

BACKGROUND

Having no or few confidants is found to be associated with more severe mental health problems and a higher prevalence of depression in adults, but research examining this association in adolescents is scarce. Social relationships may be particularly critical during adolescence, as it is an important developmental period during which vulnerability to mental health problems increases. The present study examined the relationship between having no or few confidants and anxiety/depressive symptoms in adolescents.

METHODS

Cross-sectional self-report survey targeting 7-12th grade students (age range: 12-18) was conducted in public junior and senior high schools in Mie and Kochi, Japan. Data from 17,829 students (49.7% boys) were analyzed. Associations between anxiety/depressive symptoms (12-item General Health Questionnaire; score range: 0-12) and the number of confidants (None, 1-3, or ≥ 4) were examined using multilevel regression analyses. The analyses were stratified by gender and school level (junior/senior high), and adjusted for experiences of being physically abused and bullied and the interactions of these experiences with the number of confidants.

RESULTS

Having no or 1-3 confidants was associated with more anxiety/depressive symptoms, compared to having ≥ 4 confidants (p < 0.001) in all stratified groups. Having no confidants was associated with more anxiety/depressive symptoms than having 1-3 confidants (p < 0.001); in senior high boys, no difference was observed between having no confidants and having 1-3 confidants. In addition, in senior high boys, victims of bullying who have confidants reported significantly less anxiety/depressive symptoms than the victims who have no confidants (p < 0.01).

CONCLUSIONS

Adolescents who had no or few confidants had more anxiety/depressive symptoms. Attention needs to be paid to better identify these adolescents, and avenues to support them need to be established.

Executive functioning in child victims of sexual abuse: A multi-informant comparative study

BACKGROUND

Research examining the association between child sexual abuse and executive functions is limited. Yet, exposure to traumatic situations at a young age has been associated with changes in the prefrontal cortex, which hosts executive functions (Wesarg et al., 2020). These functions are crucial for social adaptation, as they make it possible to inhibit maladaptive behavior and respond flexibly to the demands of the environment. As middle childhood is a sensitive period for the development of self-regulatory abilities, exploring executive functioning in school-age children could provide potential intervention targets (Dajani & Uddin, 2015).

OBJECTIVE

Using multiple informants, this study compared executive functioning of sexually abused children to that of non-sexually victimized children and examined whether the differences were moderated by sex.

METHODS

The sample consisted of 225, 6-to-12 years old children with a history of child sexual abuse (CSA) and 97 children without a history of CSA. Children completed two executive functioning tasks measuring cognitive flexibility and inhibition. Parents and teachers completed questionnaires evaluating children's executive functioning.

RESULTS

In comparison to non-abused children, children with a history of CSA displayed greater executive functioning difficulties as assessed by both informant-reported questionnaires and self-completed tasks. Significant interaction effects were found, such as CSA predicting lower inhibition and executive functions at school in boys but not in girls.

CONCLUSION

This study is a first step in understanding the association between CSA and executive functioning and offers a clearer picture of the differential impact of sexual trauma according to children's sex.

An examination of the relationship between conduct problems and depressive symptoms comorbidity and temperament among elementary school children

Although the comorbidity between conduct problems (CP) and depressive symptoms (DS) is associated with a host of negative outcomes, the factors, such as temperament, that might explain this comorbidity in school-aged boys and girls are poorly understood. This study compared elementary school children presenting co-occurring CP and DS to children with DS only, CP only, and those with low-level symptoms on temperament dimensions, and explored the moderating role of child sex in the associations. Participants are 487 children (M = 8.38 years, SD = 0.92, 52.2% girls) divided into four groups (CP + DS, DS only, CP only, control). Findings suggest that boys with CP and DS presented a lower level of fear than boys with DS and boys from the control group. They also presented higher levels of activity than boys with DS. Girls with CP and DS presented lower levels of fear than girls with DS, lower levels of approach and activity than girls with CP, and higher levels of shyness than girls from the control group. These findings suggest that temperament may discriminate children with comorbid CP and DS from those presenting only CP or DS.

Global, regional, and national temporal trend in burden of major depressive disorder from 1990 to 2019: An analysis of the global burden of disease study

Major depressive disorder (MDD) is one of the leading causes of disability worldwide. Comprehensive description of the global burden of MDD and its attributable risk factors is essential for policymaking but currently lacking. In this study, we aim to estimate the burden of MDD in terms of incidence, prevalence, and years lived with disability (YLDs), along with its attributable risk factors at global, regional, and rational level between 1990 and 2019, using data from the Global Burden of Diseases, Injuries, and Risk Factors Study 2019. Data analysis was completed on July 1, 2023. In 2019, 274.80 million (95 % uncertainty interval [UI], 241.28 to 312.77) new cases of MDD were identified globally, with an increase of 59 % from 1990. A total of 37.20 million (25.65 to 51.22) YLDs were attributable to MDD, accounting for the largest proportion of mental disorder YLDs (29.7 %). Countries in the low sociodemographic index quantile exhibited the highest age-standardized incidence rate of MDD, with Uganda (7836.2, per 100,000 person-years, 6713.7 to 9181.1) and Palestine (7687.7, 6546.1 to 9023.9) reporting the highest rates among them. The United States had the highest increase in age-standardized rates, with an average annual percent change of 0.99. Females had 1.6 times higher age-standardised rates than males, ranging from 1.2 (Oceania) to 2.2 (tropical Latin America) times across 21 regions. Globally, the proportions of YLDs due to MDD attributable to bullying victimization, childhood sexual abuse, and intimate partner violence were 4.86 %, 5.46 %, and 8.43 % in 2019, respectively. The heavy burden of MDD serves as a stark reminder that a coordinated response from governments and health communities is urgently needed to scale up mental health services and implement effective interventions, particularly in low-income countries.

The relationship between social withdrawal and problematic social media use in Chinese college students: a chain mediation of alexithymia and negative body image

This study explores the relationship between social withdrawal and problematic social media use among college students, with a focus on the mediating roles of alexithymia and negative body image. Using the University Student Social Withdrawal Questionnaire, Social Media Addiction Scale, Toronto Alexithymia Scale, and Negative Body Image Scale, 2582 college students (33.46% male, average age = 19.46 years, SD = 2.23) were surveyed. Social withdrawal, alexithymia, negative body image, and problematic social media use were significantly correlated with each other. Social withdrawal positively predicted problematic social media use, and both alexithymia and negative body image played a chain mediating role between social withdrawal and problematic social media use. The findings indicate that individual social withdrawal is associated with college students' problematic use of social media. The results suggest that alexithymia and negative body image may mediate this association, highlighting a potential pathway through which social withdrawal influences social media use patterns.

Emotion Regulation Strategies and Mental Health in Dementia Caregivers: The Moderating Role of Gender

INTRODUCTION

Providing care for a loved one with dementia can engender intense emotions that contribute to symptoms of anxiety and depression. Caregivers often attempt to regulate their emotions using strategies like cognitive reappraisal (CR; changing how they think about the situation) or expressive suppression (ES; hiding their emotions). However, men and women caregivers may differ in their use of these strategies. The current study examines gender differences in reported CR and ES usage and their associations with depression and anxiety in dementia caregivers.

METHODS

We combined data from three independent studies of informal dementia caregivers (total N = 460) who reported on their use of CR, ES, and symptoms of anxiety and depression.

RESULTS

Women caregivers reported greater use of CR and less use of ES compared to men. Gender moderated the association between CR and depression, such that greater use of CR in women was associated with fewer depressive symptoms, but not for men. Gender did not significantly moderate the association between ES and depression, or between either emotion regulation strategy and anxiety.

CONCLUSION

Findings of a unique relationship between greater CR use and less depression among women CGs, although correlational, suggest that utilizing CR may be particularly helpful for reducing depression in women caregivers. These results underscore the need for further research to determine how best to support the mental well-being of dementia caregivers.

The Development of Cognitive Control in Preschoolers and Kindergarteners: The Case of Post-Error Slowing and Delayed Disinhibition

This study aimed to investigate two specific behavioral manifestations of the executive attention systems in preschoolers and kindergarteners, beyond the unique contribution of intelligence. We tested post-error slowing [RT¯Post-error trial-RT¯Not post-error trial] as a marker of reactive control and delayed disinhibition as a novel marker for proactive control. One hundred and eighty preschool- and kindergarten-aged children, as well as their mothers (final sample: 155 children and 174 mothers), performed an adapted task based on Go/NoGo and Stroop-like paradigms-the emotional day-night task. The children showed reliable post-error slowing and delayed disinhibition (mean size effects of 238.18 ms and 58.31 ms, respectively), while the adult size effects were 40-50% smaller. The post-error slowing effect was present for both sexes in all the tested ages, while the delayed disinhibition effect was present only for girls. Both effects showed large individual differences that became smaller in adulthood. Our findings emphasize the earlier maturation of reactive control compared to proactive control, and the earlier maturation of proactive cognitive control in girls compared to boys.

The correlation between mobile phone addiction and procrastination in students: A meta-analysis

BACKGROUND

Mobile phone addiction (MPA) has been extensively researched as an important factor for students' procrastination. However, the direction and magnitudes of the correlation between MPA and procrastination remain unclear. This meta-analysis, thus, aims to explore the relationship between MPA and procrastination in students, as well as the moderating effects of participant's individual characteristics (education level and sex), measurement tools, and social situational factors (publication year and culture).

METHODS

Qualified studies were obtained through a systematic search of PubMed, Web of Science, Embase, PsycINFO, China National Knowledge Infrastructure (CNKI), Wanfang, and Weipu. Meta-analysis was conducted in the CMA 3.0 software, and meta-analysis of variance (ANOVA) was used to test the moderating effect.

RESULTS

A total of 75 studies, including 48,031 participants, were obtained. The combined effect size of the random effects model showed a significant positive correlation between MPA and procrastination in students (r = 0.376, 95 % CI [0.345, 0.406]). Education level, sex, culture, and MPA measurement tools significantly moderated the correlation between MPA and procrastination. However, the correlation was not moderated by the year of publication and the measurement tools of procrastination.

CONCLUSION

MPA is positively correlated with procrastination in students. Given the high incidence of MPA in students and its potential risk factors for procrastination, attention should be paid to the identification and intervention of MPA to prevent students from procrastination.

Temperament in Toddlers With and Without Prelingual Hearing Loss

PURPOSE

The purpose of this study is to examine parent-reported ratings of temperament in toddlers with and without prelingual hearing loss.

METHOD

The parent-completed Early Childhood Behavior Questionnaire (ECBQ) was used to assess temperament in toddlers aged 18-36 months. Three dimensions of temperament were examined: surgency, negative affectivity, and effortful control. Analyses were conducted to (a) examine differences in temperament across toddlers with and without prelingual hearing loss; (b) examine possible associations between temperament, demographic, and communication factors; and (c) determine if the ECBQ is sensitive to differences in hearing, communication, and listening skills among toddlers with prelingual hearing loss.

RESULTS

The parent-completed ECBQ revealed that toddlers with prelingual hearing loss differed from their hearing peers on some but not all dimensions of temperament. Specifically, children with prelingual hearing loss were rated as displaying higher levels of surgency and lower levels of effortful control but comparable levels of negative affectivity when compared to their hearing peers. Regression analyses revealed that chronological age and communication strategy predicted scores of effortful control in toddlers with prelingual hearing loss, whereas chronological age alone predicted scores of effortful control in toddlers with hearing. Finally, the ECBQ appears to contain "listening" items that skew (lower) levels of effortful control in toddlers with prelingual hearing loss, such that only the group effect of higher levels of surgency remained after removing these "listening" items. Correlations between the original and our modified ECBQ (removing the "listening" items) revealed strong associations, reflective of high construct validity.

CONCLUSIONS

This was the first study to measure temperament in toddlers with prelingual hearing loss using the ECBQ. Our results revealed differences between children with and without prelingual hearing loss centering on the dimension of surgency. Examining differences in temperament during the toddler period of development may be particularly important and useful for predicting functional outcomes following prelingual hearing loss.

Provoked and unprovoked aggression in toddlerhood: Evaluating measurement invariance and latent means across gender, age, and time

This paper re-examined the factor structure of a recently developed parent report of aggression, the Provoked and Unprovoked Aggression Questionnaire, and evaluated measurement invariance and latent mean differences across gender, age, and time. Participants were 333 mothers of toddlers (younger age group: n = 167, 53.9% boys, Mage Time 1  = 18.30 months, SD = 0.45; older age group: n = 166, 48.8% boys, Mage Time 1  = 24.29 months, SD = 0.38) who filled out provoked (eight items) and unprovoked (five items) aggression scales twice over a 3-month period. We found evidence for the configural, metric, and scalar measurement invariance-a requirement needed to make a meaningful comparison between aggression means across gender, age groups, and time. When comparing means for boys and girls, gender differences emerged earlier for unprovoked than provoked aggression. Also, the frequency of provoked aggression increased among younger, but not older, toddlers. By developing a brief parental report of aggression in toddlerhood, we hope to fill a void of early aggression measures that tap the contextual variability in aggressive behaviors, and thereby stimulate more research to further our understanding of different types of aggression and their correlates in toddlerhood.

The Association Between Emotion Recognition and Internalizing Problems in Children and Adolescents: A Three-Level Meta-Analysis

Numerous studies have explored the link between how well youth recognize emotions and their internalizing problems, but a consensus remains elusive. This study used a three-level meta-analysis model to quantitatively synthesize the findings of existing studies to assess the relationship. A moderation analysis was also conducted to explore the sources of research heterogeneity. Through a systematic literature search, a total of 42 studies with 201 effect sizes were retrieved for the current meta-analysis, and 7579 participants were included. Emotion recognition was negatively correlated with internalizing problems. Children and adolescents with weaker emotion recognition skills were more likely to have internalizing problems. In addition, this meta-analysis found that publication year had a significant moderating effect. The correlation between emotion recognition and internalizing problems decreased over time. The degree of internalizing problems was also found to be a significant moderator. The correlation between emotion recognition and internalizing disorders was higher than the correlation between emotion recognition and internalizing symptoms. Deficits in emotion recognition might be relevant for the development and/or maintenance of internalizing problems in children and adolescents. The overall effect was small and future research should explore the clinical relevance of the association.

Functions of music, focused on the context of music listening, and psychological well-being in late adolescence regarding gender differences

Late adolescences, as a developmentally challenging transitional period between childhood and adulthood, provides a number of pressures that impact well-being of youth. Among approaches for facilitating well-being, music is reported to be one of the most effective ones, which was especially proven during Covid-19 pandemic. Given the significance of music and music listening in late adolescence, our study sought to examine the relationship between psychological well-being and music listening among university students (N = 603; Nfemale = 356, Nmale = 247) with a focus on the social, intrapersonal, and sociocultural context of music listening. The RESPECT music scale, the SPWB, and the PANAS were used to measure positive and negative affect as well as the six components of psychological well-being. The findings revealed that, while there were no gender differences in the sociocultural setting, females reported to listen to music more frequently than males in intrapersonal and social contexts. In two areas, female students rated their psychological well-being higher than male students: personal growth and positive relationships with others. They also reported experiencing positive and negative affect more frequently than men. Regression analyses revealed that the functions of music explained only a small amount of the variance in psychological well-being. Specifically, music listening in a social and sociocultural context significantly explained two aspects of psychological well-being: personal growth and positive relations with others. The intrapersonal context of music listening predicted a positive affect, while the social context predicted a negative affect. Our study highlights several implications of music listening in youth regarding gender either in everyday activities or in educational and clinical setting.

Modulation of dog-owner relationship and dog social and cognitive behavior by owner temperament and dog breed group

As companion dogs spend most of their lives with humans, the human-dog relationship and owner temperament may affect the dog behavior. In this study (n = 440), we investigated the relationship between the dog owner temperament (ATQ-R), owner-perceived dog-owner relationship (MDORS) and the dog behavior in three behavioral tests: the object-choice test, the unsolvable task, and the cylinder test. Dog owner temperament influenced the dog-owner relationship. Owners with high negative affectivity showed higher emotional closeness and perceived costs of their dog, whereas owners with high effortful control showed lower emotional closeness and perceived costs. Higher dog activity during the behavioral tests was also connected with owner-perceived lower emotional closeness. Furthermore, dog breed group modulated the connection between the owner temperament and dog behavior. Owner's high negative affectivity correlated with herding dogs' lower scores in the object choice test, while the behavior of primitive type dogs was unaffected by the owner temperament. Our results confirm that human characteristics are associated with the owner-reported dog-owner relationship, and owner temperament may have a modulatory effect on the dog social and cognitive behavior depending on the dog breed group, which should be investigated further.

Examining transactional associations between maternal internalizing symptoms, infant negative emotionality, and infant respiratory sinus arrhythmia

The current study examined transactional associations between maternal internalizing symptoms, infant negative emotionality, and infant resting respiratory sinus arrhythmia (RSA). We used data from the Longitudinal Attention and Temperament Study (N = 217) to examine the associations between maternal internalizing symptoms, infant negative emotionality, and infant resting RSA from 4-months to 18-months using a random-intercepts cross-lagged panel model. We found that mothers with higher average internalizing symptoms have infants with higher levels of resting RSA. However, there were no stable, between-individual differences in infant negative emotionality across time. Additionally, we found significant negative within-dyad cross-lagged associations from maternal internalizing symptoms to subsequent measures of infant negative emotionality, as well as a significant negative cross-lagged association from maternal internalizing symptoms to child resting RSA after 12-months of age. Lastly, we find evidence for infant-directed effects of negative emotionality and resting RSA to maternal internalizing symptoms. Results highlight the complex, bidirectional associations in maternal-infant dyads during the first two years of life, and the importance of considering the co-development of infant reactivity and regulatory processes in the context of maternal internalizing symptoms.

Approach-avoidance orientations can predict young children's decision-making

When facing situations that involve risk and reward, some may focus on the opportunity for reward, whereas others may focus on potential risks. Here, we used an original set of pictorial scenarios to try and predict 3- to 8-year-olds' reward-seeking and risk-avoiding behavior in three decision-making scenarios (N = 99; Mage = 5.6; 47% girls). We found that children's reward-risk tendencies did not predict sharing behavior in a dictator-game 'sharing' task. However, they predicted children's monopolizing behavior in a dictator-game 'taking' task and their preferences between taking home a 'risky' or a 'safe' reward in a novel prize-preference task. Overall, using a set of original pictorial scenarios to assess individual differences early on in development now provides initial evidence that bridges individual differences and decision-making domains and exposes behavioral patterns that were thus far hidden.

Sex differences in infant vocalization and the origin of language

Seeking to discern the earliest sex differences in language-related activities, our focus is vocal activity in the first two years of life, following up on recent research that unexpectedly showed boys produced significantly more speech-like vocalizations (protophones) than girls during the first year of life.We now bring a much larger body of data to bear on the comparison of early sex differences in vocalization, data based on automated analysis of all-day recordings of infants in their homes. The new evidence, like that of the prior study, also suggests boys produce more protophones than girls in the first year and offers additional basis for informed speculation about biological reasons for these differences. More broadly, the work offers a basis for informed speculations about foundations of language that we propose to have evolved in our distant hominin ancestors, foundations also required in early vocal development of modern human infants.

The good, the bad, and the ugly: a comprehensive study of temperament and personality traits as correlates of self-reported disruptive behavior problems in male and female adolescents

Purpose

The aim of the present study was to provide a comprehensive picture of temperament and personality traits as correlates of self-reported disruptive behavior problems in male and female adolescents.

Methods

Two-hundred-and-sixty-three non-clinical adolescents aged 12-18 years completed a survey containing standardized scales to measure the HEXACO personality traits, impulsivity, effortful control, Dark Triad traits, and symptoms of oppositional-defiant disorder (ODD) and conduct disorder (CD).

Results

The results showed that good traits (in particular, honesty-humility, agreeableness, and the regulative trait of effortful control) were negatively associated, while bad and ugly traits (especially impulsivity and the Dark Triad traits of psychopathy and Machiavellianism) were positively associated with symptoms of ODD and CD. In addition, regression analyses indicated that both types of disruptive behavior problems were associated with a unique set of temperament and personality correlates, and that specific correlates also differed for both genders.

Conclusions

It is concluded that research on the role of temperament and personality should adopt a broad perspective, taking good, bad, and ugly traits from various theoretical models as well as gender differences into account.

Associations of household tobacco smoking status with childhood temperament among U.S. preschool-aged children

BACKGROUND

This study investigated the association between household tobacco smoking status and temperament among U.S. 3-5-year-olds.

METHODS

A secondary analysis of 2019-2020 National Survey of Children's Health data (N = 11,100) was conducted. Temperament dimensions of effortful control (characterized by attention focusing), negative affectivity (characterized by anger and soothability), and surgency (characterized by activity level and shyness) were assessed. Weighted ordinal regression models were conducted while adjusting for child and family covariates.

RESULTS

Approximately 13 % of children lived with smokers. Compared to children who did not live with smokers, children living with smokers displayed behaviors of poorer effortful control and were more likely to be easily distracted (AOR = 1.59, 95%CI = 1.24-2.04) and less likely to keep working on tasks until finished (AOR = 0.56, 95%CI = 0.44-0.71). Children living with smokers displayed behaviors of greater negative affectivity and were at increased odds of being angry or anxious when transitioning between activities (AOR = 1.50, 95%CI = 1.13-1.98) and losing their temper when things did not go their way (AOR = 1.53, 95%CI = 1.20-1.96), and were at decreased odds of calming down quickly when excited (AOR = 0.54, 95%CI = 0.42-0.70). Children living with smokers displayed behaviors of poorer surgency and were less likely to play well with others (AOR = 0.58, 95%CI = 0.45-0.76) and sit still compared to same-aged children (AOR = 0.56, 95%CI = 0.44-0.71).

LIMITATIONS

The NSCH uses a cross-sectional survey design; longitudinal associations and objective measures could not be assessed. However, the NSCH is nationally representative and results are generalizable to U.S. 3-5-year-olds.

CONCLUSIONS

Findings suggest household tobacco smoking influences temperament in early childhood. Results signify the need to promote household tobacco cessation.

Beliefs in Regulating Negative Emotions and Vagally Mediated Heart Rate Variability: Does Sex Make a Difference?

OBJECTIVE

This ecological study explored the association between regulatory emotional self-efficacy beliefs in managing negative emotions (RESE-NE) and heart rate variability (HRV), a measure of parasympathetic modulation of the heart that has been positively associated with a better ability to flexibly adjust to a changing environment and regulate emotions.

METHOD

To test these associations, we used data from 161 adults working in relational professions (about 40% men; mean [standard deviation] age = 40.45 [14.17] years) whose HRV was assessed continuously for 24 hours.

RESULTS

Individuals high in RESE-NE showed increased HRV levels ( β = -0.05, p = .011). However, this effect was moderated by biological sex ( β = -0.18, p = .0001) such that RESE-NE positively and significantly predicted HRV for men ( β = 0.18, p < .0001) but not for women ( β = -0.001, p = .989).

CONCLUSIONS

All in all, our study provides initial empirical support for the theoretical expectation derived from social cognitive theory that RESE-NE is positively correlated with a physiological indicator of adaptability to the environmental demands. This was true only for men, likely because of sex differences in physiological stress reactivity and regulation.

Risk and protective factors for (internet) gaming disorder: A meta-analysis of pre-COVID studies

This large-scale meta-analysis aimed to provide the most comprehensive synthesis to date of the available evidence from the pre-COVID period on risk and protective factors for (internet) gaming disorder (as defined in the DSM-5 or ICD-11) across all studied populations. The risk/protective factors included demographic characteristics, psychological, psychopathological, social, and gaming-related factors. In total, we have included 1,586 effects from 253 different studies, summarizing data from 210,557 participants. Apart from estimating these predictive associations and relevant moderating effects, we implemented state-of-the-art adjustments for publication bias, psychometric artifacts, and other forms of bias arising from the publication process. Additionally, we carried out an in-depth assessment of the quality of underlying evidence by examining indications of selective reporting, statistical inconsistencies, the typical power of utilized study designs to detect theoretically relevant effects, and performed various sensitivity analyses. The available evidence suggests the existence of numerous moderately strong and highly heterogeneous risk factors (e.g., male gender, depression, impulsivity, anxiety, stress, gaming time, escape motivation, or excessive use of social networks) but only a few empirically robust protective factors (self-esteem, intelligence, life satisfaction, and education; all having markedly smaller effect sizes). We discuss the theoretical implications of our results for prominent theoretical models of gaming disorder and for the existing and future prevention strategies. The impact of various examined biasing factors on the available evidence seemed to be modest, yet we identified shortcomings in the measurement and reporting practices.

Annual Research Review: Developmental pathways linking early behavioral inhibition to later anxiety

Behavioral Inhibition is a temperament identified in the first years of life that enhances the risk for development of anxiety during late childhood and adolescence. Amongst children characterized with this temperament, only around 40 percent go on to develop anxiety disorders, meaning that more than half of these children do not. Over the past 20 years, research has documented within-child and socio-contextual factors that support differing developmental pathways. This review provides a historical perspective on the research documenting the origins of this temperament, its biological correlates, and the factors that enhance or mitigate risk for development of anxiety. We review as well, research findings from two longitudinal cohorts that have identified moderators of behavioral inhibition in understanding pathways to anxiety. Research on these moderators has led us to develop the Detection and Dual Control (DDC) framework to understand differing developmental trajectories among behaviorally inhibited children. In this review, we use this framework to explain why and how specific cognitive and socio-contextual factors influence differential pathways to anxiety versus resilience.

Sex differences, asymmetry, and age-related white matter development in infants and 5-year-olds as assessed with tract-based spatial statistics

The rapid white matter (WM) maturation of first years of life is followed by slower yet long-lasting development, accompanied by learning of more elaborate skills. By the age of 5 years, behavioural and cognitive differences between females and males, and functions associated with brain lateralization such as language skills are appearing. Diffusion tensor imaging (DTI) can be used to quantify fractional anisotropy (FA) within the WM and increasing values correspond to advancing brain development. To investigate the normal features of WM development during early childhood, we gathered a DTI data set of 166 healthy infants (mean 3.8 wk, range 2-5 wk; 89 males; born on gestational week 36 or later) and 144 healthy children (mean 5.4 years, range 5.1-5.8 years; 76 males). The sex differences, lateralization patterns and age-dependent changes were examined using tract-based spatial statistics (TBSS). In 5-year-olds, females showed higher FA in wide-spread regions in the posterior and the temporal WM and more so in the right hemisphere, while sex differences were not detected in infants. Gestational age showed stronger association with FA values compared to age after birth in infants. Additionally, child age at scan associated positively with FA around the age of 5 years in the body of corpus callosum, the connections of which are important especially for sensory and motor functions. Lastly, asymmetry of WM microstructure was detected already in infants, yet significant changes in lateralization pattern seem to occur during early childhood, and in 5-year-olds the pattern already resembles adult-like WM asymmetry.

Married women with children experience greater intrasexual competition than their male counterparts

Human males are considered to be more competitive than females. However, females must also compete for resources necessary for their own and their offsprings' survival. Since females use more indirect forms of competition than males, comparing observable forms of competition may be misleading. One critical driver of competition is resource asymmetry. Since competition occurs primarily within sex, reactions to resource asymmetry with same-sex peers should provide an important measure of competitiveness. We asked 596 married participants, 25-45 years of age with at least one child from three different countries to evaluate how same-sex individuals they know would react to a target individual who had a valuable resource that the same-sex individuals did not have. Half the participants evaluated reactions to same-sex targets, while the other half evaluated reactions to other-sex targets. Participants reported that women would react more negatively than men to resource asymmetry with same-sex targets, but not other-sex targets. These results suggest that women may be even more competitive than men in contexts when important resources related to reproductive success are at stake.

Trait continuity: Can parent-rated infant temperament predict HEXACO personality in early adulthood?

Examining the Raine cohort study, we tested the trait continuity hypothesis by examining the extent that young adults' (25-29 years old) self-reported HEXACO personality can be statistically predicted from multi-dimensional parental temperament ratings collected in infancy (1-2 years old). The study incorporated a lagged design (two waves), a large sample size (n = 563), and examined both temperament and personality as both dimensions and profiles. Overall, we found very limited evidence of trait continuity, with generally very weak and few statistically significant observed associations of infant temperament with early adulthood personality. Relations were weak whether profile or dimension-based operationalizations of both phenomena were adopted. Additionally, controlling for sex affected the relations of temperament and personality only to a small extent for most of the traits, and moderation effects of sex were generally zero-to-trivial in size. Altogether, parent-rated temperament in infancy seems to provide little information about HEXACO personality in early adulthood.

Cross-Cultural Sex/Gender Differences in Produced Word Content Before the Age of 3 Years

Does sex/gender matter for language acquisition? Small advantages in vocabulary size for females are well documented. In this study, however, we found that children's early vocabulary composition was a significantly better predictor of sex/gender than their vocabulary size. We conducted classification analysis on word-production data from children (12-36 months old, n = 39,553) acquiring 26 different languages. Children's sex/gender was classified at above-chance levels in 22 of 26 languages. Classification accuracy was significantly higher than for models based on vocabulary size and increased as a function of sample size. Boys produced more words for vehicles and outdoor scenes, whereas girls produced more words for clothing and body parts. Classification accuracy also increased as a function of age and peaked at 30 months, reaching accuracy levels observed in studies of adult word use. These differences in vocabulary are indicative of differences in the lifeworld of children and may themselves cause further differences in development.

Positive Parenting and Early Childhood Cognition: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

This review examines the effectiveness of positive parenting interventions aimed at improving sensitivity, responsiveness, and/or non-harsh discipline on children's early cognitive skills, in four meta-analyses addressing general mental abilities, language, executive functioning, and pre-academics. The objectives are to assess the magnitude of intervention effectiveness and identify moderators of effectiveness. We include randomized controlled trials of interventions targeting positive parenting to improve cognition in children < 6 years. Studies that include children with neurodevelopmental and/or hearing disorders were excluded. MEDLINE, PsycINFO, ERIC, and ProQuest Dissertations & Theses (October 2021) and citation chaining identified relevant records. Five reviewers completed screening/assessments, extraction, and risk of bias. Pooled analysis in Comprehensive Meta-Analysis (Version 3) used random effects modeling, with moderation via Q-statistics and meta-regression. Positive parenting interventions led to significant improvements in mental abilities (g = 0.46, N = 5746; k = 33) and language (g = 0.25, N = 6428; k = 30). Effect sizes were smaller and nonsignificant for executive functioning (g = 0.07, N = 3628; k = 14) and pre-academics (g = 0.16, N = 2365; k = 7). Robust moderators emerged for language and cognition. For cognition, studies with higher risk of bias scores yielded larger intervention effects. For language, studies with younger children had larger effect sizes. Studies mitigated selection and detection bias, though greater transparency of reporting is needed. Interventions that promote parental sensitivity, responsiveness, and non-harsh discipline improve early mental abilities and language. Studies examining executive functioning and pre-academics are needed to examine moderators of intervention effectiveness. Trial registration Systematic review PROSPERO registration. CRD42020222143.

Relationships Between Maternal Perinatal Mood, Sex of Infant, and Disappointment with Sex of Infant in a North American Sample

OBJECTIVES

Little is known about the relationships between sex of infant, disappointment with sex of infant, and risk for perinatal depression, particularly in societies where the nature of parental sex preference is thought to be "balanced" between male and female offspring. We sought to explore relationships between these variables in a North American population.

METHODS

In this exploratory study, we used data from a large Canadian prospective longitudinal study in which data were collected at up to four timepoints: during pregnancy, and at 1 week, 1 month and 3 months postpartum. Data about sex of infant, maternal preference for, and disappointment in sex of infant were recorded at the first possible timepoint; while at each postpartum timepoint infant fussiness and EPDS scores were recorded. We performed a mixed-effects linear regression to evaluate relationships between these variables.

RESULTS

In our sample of N = 207 women, EPDS scores were higher for mothers of male versus female infants, and independently associated with infant fussiness. There was no interaction between sex of infant and maternal disappointment, or between maternal disappointment and EPDS scores.

CONCLUSIONS

Mothers of male infants may have slightly more depressive symptoms than mothers of female infants regardless of maternal preference for, or disappointment in sex of infant; sex-specific biological risk factors for PPD should be explored.

Perceptual similarity of psychopathy and marital quality in Chinese married couples: The mediating role of couple communication

Previous studies have shown that psychopathy, one of the Dark Triad personality traits, is associated with relationship dissatisfaction. However, the similarity of psychopathy among romantic couples remains uncertain with regard to relationship outcomes. This study examined the effect of the perceptual similarity of psychopathy on marital quality in a sample of 245 heterosexual married couples, using intraclass correlation coefficients as the method for assessing couples' similarity. This study also explored the possible mediating role of couple communication based on the Actor-Partner Interdependence model. The results reveal that husbands' self-rating and wives' partner-rating of psychopathy showed negative effects on marital quality, whereas wives' perceptual similarity of psychopathy exerted both actor and partner effects on marital quality via couple communication. The current study enriches the theoretical framework of personality and relationship outcomes and emphasizes the importance of communication in a close relationship.