Stephanie F. Thompson

Income, cumulative risk, and longitudinal profiles of hypothalamic–pituitary–adrenal axis activity in preschool-age children

Environmental risk predicts disrupted basal cortisol levels in preschool children. However, little is known about the stability or variability of diurnal cortisol morning levels or slope patterns over time in young children. This study used latent profile analysis to identify patterns of the hypothalamic-pituitary-adrenal axis activity during the preschool period. Using a community sample (N = 306), this study measured income, cumulative risk, and childrens diurnal cortisol (morning level and slope) four times across 2.5 years, starting when children were 36 months old. Latent profile analysis profiles indicated that there were predominantly stable patterns of diurnal cortisol level and slope over time and that these patterns were predicted by income and cumulative risk. In addition, there were curvilinear relations of income and cumulative risk to profiles of low morning cortisol level and flattened diurnal slope across time, suggesting that both lower and higher levels of income and cumulative risk were associated with a stress-sensitive physiological system. Overall, this study provides initial evidence for the role of environmental risk in predicting lower, flattened basal cortisol patterns that remain stable over time.

Parenting as a Moderator of the Effects of Maternal Depressive Symptoms on Preadolescent Adjustment

The purpose of this study was to examine whether parenting moderated the association between maternal depressive symptoms and initial levels and growth of preadolescent internalizing and externalizing symptoms. This study used a community sample of preadolescent children (N = 214; 8–12 years old at Time 1), measuring maternal depressive symptoms and parenting at Time 1, and preadolescent internalizing and externalizing symptoms at each year for 3 years. After modeling latent growth curves of internalizing and externalizing symptoms, growth factors were conditioned on maternal depressive symptoms, positive (acceptance and consistent discipline) and negative (rejection and physical punishment) parenting, and the interactions of depression and parenting. Maternal rejection moderated the relation of maternal depression with internalizing symptoms, such that high rejection exacerbated the effects of maternal depressive symptoms on initial levels of preadolescent internalizing problems. There were no significant interactions predicting externalizing problems. The findings highlight how specific parenting behaviors may alter the way in which maternal depressive symptoms confer risk for behavior problems.

Variable- and person-centered approaches to examining temperament vulnerability and resilience to the effects of contextual risk

Using both variable- and person-centered approaches, this study examined the role of temperament in relation to childrens vulnerable or resilient responses to cumulative risk. Observed reactivity and regulation dimensions of temperament were tested as mediating and moderating the relation between family cumulative risk and teacher-reported adjustment problems in a sample of 259 preschool-age children. Further, latent profile analyses were used to examine whether profiles of temperament, accounting for multiple characteristics simultaneously, provided additional information about the role of temperament in childrens responses to risk. Results support a diathesis-stress model in which high frustration, low fear, and low delay ability confer particular vulnerability for children in high-risk contexts. Benefits of multiple approaches are highlighted.

Parenting as a Moderator of the Effects of Cumulative Risk on Children's Social-Emotional Adjustment and Academic Readiness.

This study examined whether parenting moderated the association between cumulative risk and preschool childrens 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 behaviors 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 behaviors, both alone and in combination, may be context-specific.

Parenting matters: Moderation of biological and community risk for obesity

Contributions of parental limit setting, negativity, scaffolding, warmth, and responsiveness to Body Mass Index (BMI) were examined. Parenting behaviors were observed in parent-child interactions, and child BMI was assessed at 5 years of age. Mothers provided demographic information and obtained child saliva samples used to derive cortisol concentration indicators (N = 250). Geospatial crime indices were computed based on publically available information for a subsample residing within the boundaries of a Pacific Northwest city (N = 114). Maternal warmth and limit setting moderated the association between child HPA-axis regulation and BMI. BMI was higher for children at lower cortisol concentrations with greater maternal warmth and lower for youngsters with mid-range cortisol values under high maternal limit setting. Maternal scaffolding moderated the effects of crime exposure, so that lower scaffolding translated into higher child BMI with greater neighborhood crime exposure. These parenting behaviors could be leveraged in obesity prevention/intervention efforts.