Temperament and peer problems from early to middle childhood: Gene-environment correlations with negative emotionality and sociability

Childhood inhibition predicts adolescent social anxiety: Findings from a longitudinal twin study

An enduring issue in the study of mental health is identifying developmental processes that explain how childhood characteristics progress to maladaptive forms. We examine the role that behavioral inhibition (BI) has on social anxiety (SA) during adolescence in 868 families of twins assessed at ages 8, 13, and 15 years. Multimodal assessments of BI and SA were completed at each phase, with additional measures (e.g., parenting stress) for parents and twins. Analyses were conducted in several steps: first, we used a cross-lagged panel model to demonstrate bidirectional paths between BI and SA; second a biometric Cholesky decomposition showed that both genetic and environmental influences on childhood BI also affect adolescent SA; next, multilevel phenotypic models tested moderation effects between BI and SA. We tested seven potential moderators of the BI to SA prediction in individual models and included only those that emerged as significant in a final conditional model examining predictors of SA. Though several main effects emerged as significant, only parenting stress had a significant interaction with BI to predict SA, highlighting the importance of environmental moderators in models examining temperamental effects on later psychological symptoms. This comprehensive assessment continues to build the prototype for such developmental psychopathology models.

The P-factor and its genomic and neural equivalents: an integrated perspective

Different psychiatric disorders and symptoms are highly correlated in the general population. A general psychopathology factor (or "P-factor") has been proposed to efficiently describe this covariance of psychopathology. Recently, genetic and neuroimaging studies also derived general dimensions that reflect densely correlated genomic and neural effects on behaviour and psychopathology. While these three types of general dimensions show striking parallels, it is unknown how they are conceptually related. Here, we provide an overview of these three general dimensions, and suggest a unified interpretation of their nature and underlying mechanisms. We propose that the general dimensions reflect, in part, a combination of heritable 'environmental' factors, driven by a dense web of gene-environment correlations. This perspective calls for an update of the traditional endophenotype framework, and encourages methodological innovations to improve models of gene-brain-environment relationships in all their complexity. We propose concrete approaches, which by taking advantage of the richness of current large databases will help to better disentangle the complex nature of causal factors underlying psychopathology.

Negative emotionality and peer status: Evidence for bidirectional longitudinal influences during the elementary school years

Prior research indicates that high negative emotionality in combination with low peer status is conducive of clinically identified problems in childhood. This three-wave longitudinal study examined how negative emotionality and peer status are linked over time in middle and late childhood. Participants were recruited from second grade ( n = 90, mean age = 8.85) and fourth grade ( n = 119, mean age = 10.81) and were followed across a period of 2 years. Cross-lagged structural models examining concurrent and longitudinal associations between teacher-reported negative emotionality and peer ratings of likability were analyzed separately for externalizing emotion (anger) and internalizing emotion (sadness and fear). Both analyses provided support for a conceptual model in which high negative emotionality lowers peer status, and low peer status, in turn, through a feedback loop, increases negative emotionality over time. Bidirectional influences are interpreted as reflecting a transactional process involving the effects of negative emotionality on social behavior. The findings highlight the need for active efforts to help children with high negative emotionality gain acceptance from classmates.

Are Different Individuals Sensitive to Different Environments? Individual Differences in Sensitivity to the Effects of the Parent, Peer and School Environment on Externalizing Behavior and its Genetic and Environmental Etiology

Externalizing behavior is substantially affected by genetic effects, which are moderated by environmental exposures. However, little is known about whether these moderation effects differ depending on individual characteristics, and whether moderation of environmental effects generalizes across different environmental domains. With a large sample (N = 1,441 individuals) of early adolescent twins (ages 11 and 13), using a longitudinal multi-informant design, we tested interaction effects between negative emotionality and both positive and negative aspects of three key social domains: parents, peers, and schools, on the phenotypic variance as well as the etiology of externalizing. Negative emotionality moderated some of the environmental effects on the phenotypic, genetic, and environmental variance in externalizing, with adolescents at both ends of the negative emotionality distribution showing different patterns of sensitivity to the tested environmental influences. This is the first use of gene-environment interaction twin models to test individual differences in environmental sensitivity, offering a new approach to study such effects.

New brief temperament guidance program for parents of infants: A pilot evaluation

PROBLEM

Intensive temperament guidance programs have been successfully utilized to improve caregiver understanding of temperament and teach strategies for appropriately responding to temperament traits. However, the effects of providing brief psychoeducational temperament information to parents have not been previously examined.

METHODS

Mothers of 3-12-month infants (n = 35) participated in an intervention examining the impact of a comprehensive temperament brochure on temperament knowledge, program attitudes, and parent-child interactions.

FINDINGS

Mothers demonstrated increased temperament knowledge and were generally accepting of the program. Behavioral changes in mother-child interactions were observed. Sensitivity increased, and interactions shifted from more parent-directed to more balanced following the intervention. Infant gender functioned as a moderator of intervention effects for two mother-infant interaction dynamics. A significant increase in reciprocity was observed between mothers and boys, largely as a function of significantly lower levels of reciprocity preintervention. Child gender also interacted with directedness, in that interactions became more balanced for girls, but remained more mother-directed with boys. Finally, maternal education functioned as a moderator of tempo, as mothers in the higher education group shifted from slower to moderate tempo following the intervention.

CONCLUSIONS

Promising results suggest the need for continued implementation and evaluation of brief temperament interventions.

The Longitudinal Israeli Study of Twins (LIST) Reaches Adolescence: Genetic and Environmental Pathways to Social, Personality and Moral Development

The Longitudinal Israeli Study of Twins (LIST) focuses on the developmental, genetic and environmental contributions to individual differences in children's and adolescents' social behavior. Key variables have been empathy, prosocial behavior, temperament and values. Another major goal of LIST has been to study gene-environment correlations, mainly concerning parenting. LIST includes 1657 families of Hebrew-speaking Israeli twins who have participated at least once in the study. Children's environment and their development are assessed in a multivariate, multimethod fashion, including observed, parent-reported and self-reported data. The current article summarizes and updates recent findings from LIST. For example, LIST provided evidence for the heritability of human values with the youngest sample to date, and the first genetic investigation of adolescents' identity formation. Finally, future aims of LIST are discussed.

Gene-environment correlations in parental emotional warmth and intolerance: genome-wide analysis over two generations of the Young Finns Study

BACKGROUND

Genomic analysis of the child might offer new potential to illuminate human parenting. We examined whether offspring (G2) genome-wide genotype variation (SNPs) is associated with their mother's (G1) emotional warmth and intolerance, indicating a gene-environment correlation. If this association is stronger than between G2's genes and their emotional warmth and intolerance toward their own children, then this would indicate the presence of an evocative gene-environment correlation. To further understand how G1 mother's parenting has been evoked by genetically influenced characteristics of the child (G2), we examined whether child (G2) temperament partially accounted for the association between offspring genes and parental responses.

METHODS

Participants were from the Young Finns Study. G1 mothers (N = 2,349; mean age 39 years) self-reported the emotional warmth and intolerance toward G2 in 1980 when the participants were from 3 to 18 years old. G2 participants answered the same parenting scales in 2007/2012 (N = 1,378; mean age = 38 years in 2007; 59% female) when their children were on average 11 years old. Offspring temperament traits were self-reported in 1992 (G2 age range 15-30 years). Estimation of the phenotypic variance explained by the SNPs of G2 was done by genome-wide complex trait analysis with restricted maximum likelihood (GCTA-GREML).

RESULTS

Results showed that the SNPs of a child (G2) explained 22.6% of the phenotypic variance of maternal intolerance (G1; p-value = .039). G2 temperament trait negative emotionality explained only 2.4% points of this association. G2 genes did not explain G1 emotional warmth or G2's own emotional warmth and intolerance. However, further analyses of a combined measure of both G1 parenting scales found genetic effects. Parent or child gender did not moderate the observed associations.

CONCLUSIONS

Presented genome-wide evidence is pointing to the important role a child plays in affecting and shaping his/her family environment, though the underlying mechanisms remain unclear.

Dysfunctional Personality Beliefs Linked to Emotion Recognition Deficits in Individuals With Cocaine Addiction and Personality Disorders

Background: Facial emotion recognition is impaired in addiction and personality disorders. Dysfunctional personality beliefs reflect negative interpersonal schemas that may underpin emotion recognition deficits. We aimed to examine the association between personality beliefs and emotion recognition among participants with cocaine use disorder including those with comorbid personality disorders. Methods: We recruited 70 participants with cocaine use disorder aged between 19 and 52 who had used 14 g of cocaine over 4.8 years on average. Thirty-eight participants had an additional personality disorder (11 Borderline, 7 Histrionic, 5 Antisocial, 10 Avoidant, and 5 Obsessive-Compulsive). Dysfunctional beliefs were indicated with the Personality Belief Questionnaire, and facial emotion recognition was indicated with the Ekman's Test. We applied correlations/multiple regressions to test the relationship between beliefs and emotion recognition. Results: Personality beliefs reflecting paranoid, borderline, and antisocial schemas were negatively associated with emotion recognition. Antisocial beliefs were associated with poorer recognition of fear, and paranoid beliefs with poorer recognition of disgust. Antisocial beliefs were significantly associated with emotion recognition after adjusting for cocaine use. Conclusion: Dysfunctional personality beliefs are associated with poorer emotion recognition in cocaine addiction. Personality-related negative schemas about the self and others can impact social cognition and interaction during cocaine treatment.

Shared Environment Effects on Children's Emotion Recognition

Empathy is relevant to many psychiatric conditions. Empathy involves the natural ability to perceive and be sensitive to the emotional states of others. Thus, emotion recognition (ER) abilities are key to understanding empathy. Despite the importance of ER to normal and abnormal social interactions, little is known about how it develops throughout childhood. We examined genetic and environmental influences on children's ER via facial and vocal cues in 344 7-year-old twin children [59 monozygotic (MZ) and 113 same-sex dizygotic (DZ) pairs], who were part of the Longitudinal Israeli Study of Twins. ER was assessed with the child version of the Diagnostic Assessment of Nonverbal Accuracy. For both facial and vocal cues of emotion, twin correlations were not higher for MZ twins than for DZ twins, suggesting no heritability for ER in this population. In contrast, correlations were positive for both types of twins, indicating a shared environmental effect. This was supported by a bivariate genetic analysis. This pattern was robust to controlling for twins being of the same sex and age. Effects remained after controlling for background variables such as family income and number of additional siblings. The analysis found a shared environmental correlation between facial and vocal ER (r _c = .63), indicating that the shared environmental factors contributed to the overlap between vocal and facial ER. The study highlights the importance of the shared environment to children's ER.

Mother-child role confusion, child adjustment problems, and the moderating roles of child temperament and sex

Role confusion is a deviation in the parent-child relationship such that a parent looks to a child to meet the parent's emotional needs and abdicates, in part, the parental role in exchange for care, intimacy, or peer support from the child. In addition, a child may initiate role-confused behavior in order to gain closeness to a parent who is otherwise preoccupied by his or her own needs. The current study examined associations between mother-child role confusion at age 5 (we coded role confusion from filmed free-play mother-child interactions) and teacher reports of internalizing and externalizing symptoms, and peer problems, at Grade 1. The sample (N = 557) is from a longitudinal study of families in rural communities, the Family Life Project. Mother-child role confusion predicted internalizing symptoms and peer problems (but not externalizing symptoms) above and beyond other dimensions of maternal parenting (sensitivity and harsh intrusiveness), demographic factors, and prior levels of outcome variables. However, some effect sizes were small, making replication desirable. Temperament and child sex were important moderators: girls with difficult temperaments and boys with easy temperaments were more vulnerable to internalizing symptoms (but not externalizing symptoms or peer problems) in the context of role confusion. We discuss the singular importance of role confusion, a construct that has been largely unrecognized by developmental psychologists until recently, for behavioral outcomes of children as they transition into middle childhood. (PsycINFO Database Record

Predicting the use of corporal punishment: Child aggression, parent religiosity, and the BDNF gene

Corporal punishment (CP) has been associated with deleterious child outcomes, highlighting the importance of understanding its underpinnings. Although several factors have been linked with parents' CP use, genetic influences on CP have rarely been studied, and an integrative view examining the interplay between different predictors of CP is missing. We focused on the separate and joint effects of religiosity, child aggression, parent's gender, and a valine (Val) to methionine (Met) substitution in the brain-derived neurotrophic factor (BDNF) gene. Data came from a twin sample (51% male, aged 6.5 years). We used mothers' and fathers' self-reports of CP and religiosity, and the other parent's report on child aggression. Complete data were available for 244 mothers and their 466 children, and for 217 fathers and their 409 children. The random split method was employed to examine replicability. For mothers, only the effect of religiosity appeared to replicate. For fathers, several effects predicting CP use replicated in both samples: child aggression, child sex, religiosity, and a three-way (GxExE) interaction implicating fathers' BDNF genotype, child aggression and religiosity. Religious fathers who carried the Met allele and had an aggressive child used CP more frequently; in contrast, secular fathers' CP use was not affected by their BDNF genotype or child aggression. Results were also repeated longitudinally in a subsample with age 8-9 data. Findings highlight the utility of a bio-ecological approach for studying CP use by shedding light on pertinent gene-environment interaction processes. Possible implications for intervention and public policy are discussed.

Prefrontal mechanisms of comorbidity from a transdiagnostic and ontogenic perspective

Accumulating behavioral and genetic research suggests that most forms of psychopathology share common genetic and neural vulnerabilities and are manifestations of a relatively few core underlying processes. These findings support the view that comorbidity mostly arises, not from true co-occurrence of distinct disorders, but from the behavioral expression of shared vulnerability processes across the life span. The purpose of this review is to examine the role of the prefrontal cortex (PFC) in the shared vulnerability mechanisms underlying the clinical phenomena of comorbidity from a transdiagnostic and ontogenic perspective. In adopting this perspective, we suggest complex transactions between neurobiologically rooted vulnerabilities inherent in PFC circuitry and environmental factors (e.g., parenting, peers, stress, and substance use) across development converge on three key PFC-mediated processes: executive functioning, emotion regulation, and reward processing. We propose that individual differences and impairments in these PFC-mediated functions provide intermediate mechanisms for transdiagnostic symptoms and underlie behavioral tendencies that evoke and interact with environmental risk factors to further potentiate vulnerability.

The influential child: How children affect their environment and influence their own risk and resilience

Views regarding children's influence on their environment and their own development have undergone considerable changes over the years. Following Bell's (1968) seminal paper, the notion of children's influence and the view of socialization as a bidirectional process have gradually gained wide acceptance. However, empirical research implementing this theoretical advancement has lagged behind. This Special Section compiles a collection of new empirical works addressing multiple forms of influential child processes, with special attention to their consequences for children's and others' positive functioning, risk and resilience. By addressing a wide variety of child influences, this Special Section seeks to advance integration of influential child processes into myriad future studies on development and psychopathology and to promote the translation of such work into preventive interventions.