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This study examined bidirectional relations between television exposure and effortful control accounting for the effects of family contextual risk factors. Data were from a sample (N = 306) of parents and their preschool-age children (T1 M = 36 mos. in 2008-2010) assessed four times, once every 9 mos. At T1, adolescent parent status predicted lower child delay ability (DA), and maternal depression predicted higher TV time. Above these effects, higher T1 and T2 child executive control (EC) prospectively predicted lower T2 and T3 TV time, while higher T1 TV time predicted lower T2 EC. Higher EC at T4 predicted fewer total problems, greater social competence, and greater academic readiness at T4, and higher TV time at T4 predicted lower academic readiness. DA was unrelated to TV time or adjustment. Findings suggest executive control and TV time predict changes in each other in early childhood, and in turn, executive control predicts better child adjustment while TV time might be more relevant for academic readiness. Moreover, family risk factors appear to play a role in both TV viewing time and effortful control. more...

Anxiety disorders peak in incidence during adolescence, a developmental window that is marked by dynamic changes in gene expression, endocannabinoid signaling, and frontolimbic circuitry. We tested whether genetic alterations in endocannabinoid signaling related to a common polymorphism in fatty acid amide hydrolase (FAAH), which alters endocannabinoid anandamide (AEA) levels, would impact the development of frontolimbic circuitry implicated in anxiety disorders. In a pediatric imaging sample of over 1,000 3- to 21-y-olds, we show effects of the FAAH genotype specific to frontolimbic connectivity that emerge by ∼12 y of age and are paralleled by changes in anxiety-related behavior. Using a knock-in mouse model of the FAAH polymorphism that controls for genetic and environmental backgrounds, we confirm phenotypic differences in frontoamygdala circuitry and anxiety-related behavior by postnatal day 45 (P45), when AEA levels begin to decrease, and also, at P75 but not before. These results, which converge across species and level of analysis, highlight the importance of underlying developmental neurobiology in the emergence of genetic effects on brain circuitry and function. Moreover, the results have important implications for the identification of risk for disease and precise targeting of treatments to the biological state of the developing brain as a function of developmental changes in gene expression and neural circuit maturation. more...

This study examined whether parenting moderated the association between cumulative risk and preschool children's adjustment problems, social competence, and academic readiness. The sample consisted of 306 families representing the full range of income, with 29% at or near poverty and 28% lower income. Cumulative risk and observed maternal parenting behaviours were assessed when the children were 36-40 months, and teachers rated outcomes at 63-68 months. Greater cumulative risk was more strongly related to higher adjustment problems when scaffolding was low and unrelated when it was high, suggesting a protective effect. Consistent limit setting was associated with higher academic readiness regardless of risk level and at low levels of risk it was associated with the highest levels of social competence. A pattern potentially indicating differential effectiveness emerged for warmth, such that, at lower levels of risk, higher warmth was associated with better outcomes, but at higher levels of risk, it was associated with higher levels of problems and poorer social competence and academic readiness. Results suggest that buffering effects of particular parenting behaviours, both alone and in combination, may be context-specific. more...

Self-regulation refers to the ability to control behavior, cognition, and emotions, and self-regulation failure is related to a range of neuropsychiatric problems. It is poorly understood how structural maturation of the brain brings about the gradual improvement in self-regulation during childhood. In a large-scale multicenter effort, 735 children (4-21 y) underwent structural MRI for quantification of cortical thickness and surface area and diffusion tensor imaging for quantification of the quality of major fiber connections. Brain development was related to a standardized measure of cognitive control (the flanker task from the National Institutes of Health Toolbox), a critical component of self-regulation. Ability to inhibit responses and impose cognitive control increased rapidly during preteen years. Surface area of the anterior cingulate cortex accounted for a significant proportion of the variance in cognitive performance. This finding is intriguing, because characteristics of the anterior cingulum are shown to be related to impulse, attention, and executive problems in neurodevelopmental disorders, indicating a neural foundation for self-regulation abilities along a continuum from normality to pathology. The relationship was strongest in the younger children. Properties of large-fiber connections added to the picture by explaining additional variance in cognitive control. Although cognitive control was related to surface area of the anterior cingulate independently of basic processes of mental speed, the relationship between white matter quality and cognitive control could be fully accounted for by speed. The results underscore the need for integration of different aspects of brain maturation to understand the foundations of cognitive development. more...

This study examined whether effortful control (executive control [EC], delay ability [DA]) accounted for the effects of early‐childhood contextual factors (income, cumulative risk, parenting) on middle‐childhood adjustment (social competence, internalizing and externalizing problems), or whether contextual factors account for observed associations between effortful control and adjustment. A sample of children and parents (N = 306) were assessed when children were 3‐, 5‐, and 8‐years. Age‐3 income and cumulative risk predicted changes in age‐8 EC. Also, age‐3 parenting predicted changes in effortful control. Warmth and limit setting predicted increases in EC, whereas negativity predicted decreases in DA from the age of 3 to 5, and scaffolding predicted increases in EC and DA from the age of 5 to 8. In turn, age‐8 EC was associated with higher social competence. However, neither age‐8 EC nor DA was associated with internalizing or externalizing above the effects of age‐8 stress (negative life events). The findings indicate that early‐childhood income, adversity, and parenting are relevant in predicting effortful control development into middle‐childhood, and in turn, middle‐childhood social competence. However, concurrent stress appears more relevant to adjustment problems, implying some of the effects of effortful control might be accounted for by the context of risk. [ABSTRACT FROM AUTHOR] more...

This study investigated the possible unique effects of pre‐and postnatal maternal depressive symptoms in relation to parenting and children's effortful control in predicting children's adjustment. Contextual risk factors (income, negative life events) were modelled. Mothers and children (N = 306) were assessed four times, including T1 maternal reports of depressive symptoms, T2 observed parenting, T3 behavioural measures of effortful control, and T4 teacher ratings of children's outcomes. Pre‐ and postnatal contextual risk predicted maternal depression and child adjustment directly. Post‐ but not prenatal depressive symptoms predicted parenting behaviours. Pre‐ but not postnatal depressive symptoms predicted children's adjustment. Results suggest that pre‐ and postnatal maternal depressive symptoms are uniquely associated with parenting and child outcomes.This study asks if pre‐ and postnatal depressive symptoms effect children's adjustment through mothers' parenting and children's subsequent self‐regulation.Multiple methods were utilized and showed that postnatal depressive symptoms predict parenting while prenatal depressive symptoms predict adjustment.Pre‐ and postnatal maternal depressive symptoms are uniquely associated with parenting and child outcomes. [ABSTRACT FROM AUTHOR] more...

Additive and bidirectional effects of executive control and hypothalamic–pituitary–adrenal (HPA) axis regulation on children's adjustment were examined, along with the effects of low income and cumulative risk on executive control and the HPA axis. The study utilized longitudinal data from a community sample of preschool age children (N = 306, 36–39 months at Time 1) whose families were recruited to overrepresent low-income contexts. We tested the effects of low income and cumulative risk on levels and growth of executive control and HPA axis regulation (diurnal cortisol level), the bidirectional effects of executive control and the HPA axis on each other, and their additive effects on children's adjustment problems, social competence and academic readiness. Low income predicted lower Time 4 executive control, and cumulative risk predicted lower Time 4 diurnal cortisol level. There was little evidence of bidirectional effects of executive control and diurnal cortisol. However, both executive control and diurnal cortisol predicted Time 4 adjustment, suggesting additive effects. There were indirect effects of income on all three adjustment outcomes through executive control, and of cumulative risk on adjustment problems and social competence through diurnal cortisol. The results provide evidence that executive control and diurnal cortisol additively predict children's adjustment and partially account for the effects of income and cumulative risk on adjustment. [ABSTRACT FROM AUTHOR] more...

Bidirectional associations between child temperament (fear, frustration, positive affect, effortful control) and parenting behaviors (warmth, negativity, limit setting, scaffolding, responsiveness) were examined as predictors of preschool-age children's adjustment problems and social competence. Participants were a community sample of children (N = 306; 50% female, 64% European American) and their mothers. Observational measures of child temperament and parenting were obtained using laboratory tasks at two time points (children's ages 36 and 54 months). Teacher-reported adjustment measures were collected at the first and third time points (children's ages 36 and 63 months). Cross-lagged analyses were performed to examine whether child temperament and parenting predict changes in one another, whether they each contribute independently to children's adjustment, and whether these transactional relations account for adjustment outcomes. Maternal negativity at 36 months predicted increases in child frustration at 54 months. Maternal negativity and child effortful control predicted decreases in each other from 36 to 54 months. Maternal warmth predicted increases in child effortful control over time. Child frustration, child effortful control, maternal warmth, and maternal negativity at 54 months each independently predicted child adjustment problems at 63 months, controlling for problems at 36 months. Child executive control at 54 months predicted increases in child social competence at 63 months. The findings suggest that temperament and parenting have independent and additive effects on preschool-age child adjustment, with some support for a bidirectional relation. [ABSTRACT FROM AUTHOR] more...

This study aimed to specify the neural mechanisms underlying the link between low household income and diminished executive control in the preschool period. Specifically, we examined whether individual differences in the neural processes associated with executive attention and inhibitory control accounted for income differences observed in performance on a neuropsychological battery of executive control tasks. The study utilized a sample of preschool-aged children (N = 118) whose families represented the full range of income, with 32% of families at/near poverty, 32% lower income, and 36% middle to upper income. Children completed a neuropsychological battery of executive control tasks and then completed two computerized executive control tasks while EEG data were collected. We predicted that differences in the event-related potential (ERP) correlates of executive attention and inhibitory control would account for income differences observed on the executive control battery. Income and ERP measures were related to performance on the executive control battery. However, income was unrelated to ERP measures. The findings suggest that income differences observed in executive control during the preschool period might relate to processes other than executive attention and inhibitory control. [ABSTRACT FROM AUTHOR] more...

Adolescent decision-making has been described as impulsive and suboptimal in the presence of incentives. In this study we examined the neural substrates of adolescent decision-making using a perceptual discrimination task for which small and large rewards were associated with correctly detecting the direction of motion of a cloud of moving dots. Adults showed a reward bias of faster reaction times on trials for which the direction of motion was associated with a large reward. Adolescents, in contrast, were slower to make decisions on trials associated with large rewards. This behavioral pattern in adolescents was paralleled by greater recruitment of fronto-parietal regions important in representing the accumulation of evidence sufficient for selecting one choice over its alternative and the certainty of that choice. The findings suggest that when large incentives are dependent on performance, adolescents may require more evidence to accumulate prior to responding, to be certain to maximize their gains. Adults, in contrast, appear to be quicker in evaluating the evidence for a decision when primed by rewards. Overall these findings suggest that rather than reacting hastily, adolescents can be incentivized to take more time to make decisions when large rewards are at stake. A video abstract of this article can be viewed at http://youtu.be/1g4F5vzFDl0 [ABSTRACT FROM AUTHOR] more...

The only evidence-based behavioral treatment for anxiety and stress-related disorders involves desensitization techniques that rely on principles of extinction learning. However, 40% of patients do not respond to this treatment. Efforts have focused on individual differences in treatment response, but have not examined when, during development, such treatments may be most effective. We examined fear-extinction learning across development in mice and humans. Parallel behavioral studies revealed attenuated extinction learning during adolescence. Probing neural circuitry in mice revealed altered synaptic plasticity of prefrontal cortical regions implicated in suppression of fear responses across development. The results suggest a lack of synaptic plasticity in the prefrontal regions, during adolescence, is associated with blunted regulation of fear extinction. These findings provide insight into optimizing treatment outcomes for when, during development, exposure therapies may be most effective. [ABSTRACT FROM AUTHOR] more...

The article presents a study on neurobiological mechanisms underlying key learning processes during social exchanges that shape behavior through interactions with other individuals. It reveals that social learning in terms of social preferences, behavioral actions and neural activity is shaped by short positive social interactions. Event-related functional magnetic resonance imaging studies of social reinforcement in non-human primates and humans is also presented. more...

Visual cortical surface area varies two- to threefold between human individuals, is highly heritable, and has been correlated with visual acuity and visual perception. However, it is still largely unknown what specific genetic and environmental factors contribute to normal variation in the area of visual cortex. To identify SNPs associated with the proportional surface area of visual cortex, we performed a genome-wide association study followed by replication in two independent cohorts. We identified one SNP (rs6116869) that replicated in both cohorts and had genome-wide significant association (P(combined) = 3.2 × 10(-8)). Furthermore, a metaanalysis of imputed SNPs in this genomic region identified a more significantly associated SNP (rs238295; P = 6.5 × 10(-9)) that was in strong linkage disequilibrium with rs6116869. These SNPs are located within 4 kb of the 5' UTR of GPCPD1, glycerophosphocholine phosphodiesterase GDE1 homolog (Saccharomyces cerevisiae), which in humans, is more highly expressed in occipital cortex compared with the remainder of cortex than 99.9% of genes genome-wide. Based on these findings, we conclude that this common genetic variation contributes to the proportional area of human visual cortex. We suggest that identifying genes that contribute to normal cortical architecture provides a first step to understanding genetic mechanisms that underlie visual perception. more...