Tiffany D. James

Contribution of reactive and proactive control to children's working memory performance: Insight from item recall durations in response sequence planning

The present study addressed whether developmental improvement in working memory span task performance relies upon a growing ability to proactively plan response sequences during childhood. Two hundred thirteen children completed a working memory span task in which they used a touchscreen to reproduce orally presented sequences of animal names. Children were assessed longitudinally at 7 time points between 3 and 10 years of age. Twenty-one young adults also completed the same task. Proactive response sequence planning was assessed by comparing recall durations for the 1st item (preparatory interval) and subsequent items. At preschool age, the preparatory interval was generally shorter than subsequent item recall durations, whereas it was systematically longer during elementary school and in adults. Although children mostly approached the task reactively at preschool, they proactively planned response sequences with increasing efficiency from age 7 on, like adults. These findings clarify the nature of the changes in executive control that support working memory performance with age.

Preschool Sleep Problems and Differential Associations With Specific Aspects of Executive Control in Early Elementary School

This study examined the differential associations between parent-reported child sleep problems in preschool and specific aspects of executive control in early elementary school in a large sample of typically developing children (N = 215). Consistent with expectations, sleep problems were negatively associated with performance on tasks assessing working memory and interference suppression inhibition, even after controlling for general cognitive abilities, but not with flexible shifting or response inhibition. The findings add to the literature on cognitive impairments associated with pediatric sleep loss and highlight the need for early intervention for children with sleep problems to promote healthy cognitive development.

I. EXECUTIVE CONTROL IN EARLY CHILDHOOD

Executive control (EC) is a central construct in developmental science, although measurement limitations have hindered understanding of its nature and development in young children, relation to social risk, and prediction of important outcomes. Disentangling EC from the foundational cognitive abilities it regulates and that are inherently required for successful executive task completion (e.g., language, visual/spatial perception, and motor abilities) is particularly challenging at preschool age, when these foundational abilities are still developing and consequently differ substantially among children. A novel latent bifactor modeling approach delineated respective EC and foundational cognitive abilities components that undergird executive task performance in a socio demographically stratified sample of 388 preschoolers in a longitudinal, cohort-sequential study. The bifactor model revealed a developmental shift, where both EC and foundational cognitive abilities contributed uniquely to executive task performance at ages 4.5 and 5.25 years, but were not separable at ages 3 and 3.75. Contrary to the view that EC is vulnerable to socio-familial risk, the contributions of household financial and learning resources to executive task performance were not specific to EC but were via their relation to foundational cognitive abilities. EC, though, showed a unique, discriminant relation with hyperactive symptoms late in the preschool period, whereas foundational cognitive abilities did not predict specific dimensions of dysregulated behavior. These findings form the basis for a new, integrated approach to the measurement and conceptualization of EC, which includes dual consideration of the contributions of EC and foundational cognitive abilities to executive task performance, particularly in the developmental context of preschool.

Sociodemographic risk and early environmental factors that contribute to resilience in executive control: A factor mixture model of 3-year-olds

Young children at sociodemographic risk generally demonstrate lower executive control (EC), although with substantial heterogeneity across children. Given this marked variability, there may be some at-risk children who display higher EC and may be buffered from or resilient to the effects of sociodemographic risk who can be studied to identify the contributory factors. In this study, factor mixture modelling was used to determine whether subgroups of 3-year-old children existed based on their observed performance on a battery of EC tasks. Results indicated 2 latent groups: One characterized by lower EC and the other by higher EC. Both sociodemographically at-risk and low-risk children were represented in each group, yielding 4 risk-status-by-EC groups, where at-risk higher EC children were termed the resilient group. Proximal household enrichment (e.g., exposure to learning materials, varied enriching experiences, academic and language stimulation, parental responsivity) distinguished the resilient group from lower performing children of similar risk status, whereas distal financial resources and proximal social network resources did not distinguish these two groups. Results suggest potential intervention targets to promote optimal EC development, particularly among children at risk.

Executive Control Goes to School: Implications of Preschool Executive Performance for Observed Elementary Classroom Learning Engagement.

The transition to elementary school is accompanied by increasing demands for children to regulate their attention and behavior within the classroom setting. Executive control (EC) may be critical for meeting these demands; however, few studies have rigorously examined the association between EC and observed classroom behavior. This study examined EC in preschool (age 5 years 3 months) as a predictor of classroom learning engagement behaviors in first grade, using a battery of performance-based EC tasks and live classroom observations in a longitudinal sample of 313 children. Multilevel modeling results indicated that stronger EC predicted more focused engagement and fewer task management and competing responses, controlling for socioeconomic status, child sex, and age at observations. Results suggest that early EC may support subsequent classroom engagement behaviors that are critical for successful transition to elementary school and long-term learning trajectories.

Test–retest, retest, and retest: Growth curve models of repeat testing with Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)

ABSTRACT Computerized neuropsychological testing has become an important tool in the identification and management of sports-related concussions; however, the psychometric effect of repeat testing has not been studied extensively beyond test–retest statistics. The current study analyzed data from Division I collegiate athletes who completed Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) baseline assessments at four sequential time points that varied over the course of their athletic careers. Administrations were part of a larger National Institutes of Health (NIH) study. Growth curve modeling showed that the two memory composite scores increased significantly with successive administrations: Change in Verbal Memory was best represented with a quadratic model, while a linear model best fit Visual Memory. Visual Motor Speed and Reaction Time composites showed no significant linear or quadratic growth. The results demonstrate the effect of repeated test administrations for memory composite scores, while speed composites were not significantly impacted by repeat testing. Acceptable test–retest reliability was demonstrated for all four composites as well.

Early executive control and risk for overweight and obesity in elementary school.

ABSTRACT An emerging literature suggests that poor executive control (EC) may be associated with clinical weight problems, e.g., body mass index (BMI) for age percentile ≥85 in children. However, our understanding of the impact of EC on overweight and obesity in childhood is limited by the lack of longitudinal studies spanning critical developmental periods and assessing EC using comprehensive performance-based batteries. The current study addresses these limitations in a longitudinal examination of 212 children who completed an extensive laboratory-based EC task battery in preschool (age 4 years and 6 months) and were followed through elementary school (Grades 1 through 4) with objective measures of weight status. The logistic regression results indicate that poorer EC in preschool is associated with significantly greater risk for clinical weight problems (either overweight or obese status, as defined by BMI-for-age percentile ≥ 85) in elementary school, controlling for maternal education. EC in preschool was not significantly associated with risk for obese status, specifically (defined by BMI-for-age percentile ≥ 95), but the trend was in the expected direction. The results suggest that early executive abilities are relevant for children’s subsequent health status, with deficits in EC in the critical period of preschool conferring risk for later problems with weight. Based on these findings, early interventions to promote stronger EC may be a promising, yet currently overlooked, component in pediatric obesity prevention efforts.

II. THE PRESCHOOL PROBLEM SOLVING STUDY: SAMPLE, DATA, AND STATISTICAL METHODS: THE PRESCHOOL PROBLEM SOLVING STUDY

The goals set forth in Chapter I to study executive control (EC) in early childhood were examined using data from the Preschool Problem Solving Study. Here, we describe the study participants, data collection procedures, and measures used across the subsequent three chapters. In addition, the current chapter presents and elaborates on the manifest behavioral data collected for each executive and foundational cognitive ability measure central tomodels of latent EC tested inChapter III. Finally, the chapter details and provides rationale for the chosen estimation and evaluation methods used for the latent modeling in Chapters III, IV, and V.

The effects of adoption openness and type on the mental health, delinquency, and family relationships of adopted youth

ABSTRACT Analyzing the 2007 National Survey of Adoptive Parents, this study examines the impact of open adoption, demographics, and other factors on adopted children’s mental health, delinquent behavior, and family relationships. Specifically, we compare findings for youth in private and public (i.e., foster care) adoptions and identify key similarities and differences between predictors of children’s well-being across these two types of adoption. We find that youth in open foster care adoptions are more likely to receive an attachment disorder diagnosis than those in closed foster care adoptions but are also more likely to have family relationships characterized by trust and adoptive parents’ willingness to recommend adoption to others. Further, we find children in both public and private adoptions who are older at placement are more likely to have posttraumatic stress disorder diagnoses. For children in private adoptions, no statistically significant predictors affected youths’ delinquency outcomes or family relationships, with the exception of parents of private adoptees in households characterized by lower levels of poverty indicating they would be more likely to recommend adoption to others. The implications of the key findings are discussed with regard to service provision for multiple types of adoptive families.

VI. EXECUTIVE CONTROL IN PRESCHOOLERS: NEW MODELS, NEW RESULTS, NEW IMPLICATIONS

Executive control (EC) has gained increasing acceptance in developmental science as a central construct that helps to explain both normative age-related change and individual variation in learning and behavior. This popularity is not unfounded, given the utility of executive tasks in predicting individual differences across a range of important developmental domains, including internalizing and externalizing behavior; theory of mind; academic achievement; emotion regulation; and creativity, often over extended time intervals (Carlson & Moses, 2001; Carlson & Wang, 2007; Clark et al., 2010; Riggs, Jolley, & Simpson, 2013; Welsh et al., 2010). Despite these ubiquitous associations, consensus on the definition of EC continues to elude the field. This lack of clarity is especially evident for early childhood, where theoretical models derived from adult literature may not adequately reflect the dynamic nature of rapidly maturing neural and cognitive systems. In this volume, we tackled these challenges through the unique application of the bifactor model to data collected across the preschool age range. The bifactor approach provided an innovative means to address a central measurement issue in EC research: the inherent conflation of the specific control processes of interest with the foundational stimulusand This article is part of the issue “The Changing Nature of Executive Control in Preschool” Espy (Issue Editor). For a full listing of articles in this issue, see: http://onlinelibrary.wiley.com/doi/10.1111/mono. v81.4/issuetoc.