The Evolution of Interaction Shape in Differential Susceptibility

An 11-year prospective study of personality X parenting interactions as predictors of self-efficacy in young adults: diathesis-stress or differential susceptibility?

BACKGROUND

Self-efficacy, individuals' beliefs regarding their capacities to perform actions or control (potentially stressful or novel) events, is thought to be important for various life domains. Little however is known about its early precursors. This study examined the predictive effects of childhood personality and parental behaviors (i.e., overreactive discipline and warmth) for general self-efficacy in young adulthood. Furthermore, it was examined whether personality and parenting behaviors interacted and whether these interactions supported the diathesis-stress or differential susceptibility model. These aims were examined in an 11-year prospective study of 336 participants (Mage at T1 = 10.83 years, range = 9-12 years, 53.9% girls). Personality and parental behaviors were reported at T1 by both mothers and fathers, whereas self-efficacy was self-reported at T2 11 years later. Hypotheses were tested in Mplus using multilevel structural equation modeling.

RESULTS

Results revealed that (only) emotional stability, and not parenting, predicted higher self-efficacy 11 years later. Benevolence functioned as a susceptibility marker in the association between overreactivity and self-efficacy.

CONCLUSIONS

The results show that childhood emotional stability is an important long-term predictor of self-efficacy, even into emerging adulthood. Moreover, the integration of individual differences in models of parenting effects may further improve our understanding of early adults' adjustment.

Highly sensitive adolescents: The relationship between weekly life events and weekly socioemotional well-being

Recent research into Person × Environment interaction has supported the view that sensitivity to environmental influences is a susceptibility factor rather than a vulnerability factor. Given this perspective, this study examined the role of the adolescent's sensory-processing sensitivity in the context of weekly life events and weekly socioemotional well-being. In the study, 114 adolescents repeatedly self-reported their sensitivity, recent life events, and recent socioemotional well-being in four surveys at one-week intervals. The results suggested the shape of Sensitivity × Life Events interaction significantly varied from week to week, which is consistent with the vantage sensitivity and diathesis-stress framework. In specific weeks, adolescents with high sensitivity are more likely to benefit from positive events than those with low sensitivity. These sensitive adolescents can be described as developmentally susceptibility rather than vulnerability.

Moderation of associations between interparental stress and (mal)adaptation by adolescents' personality: Contrasting differential susceptibility and diathesis-stress models

Objective

This study aimed to contrast differential susceptibility and diathesis–stress models in examining adolescents' Big Five personality dimensions as moderators of longitudinal associations between interparental stress and (mal)adaptation in emerging adulthood (i.e., self‐efficacy, externalizing and internalizing behavior).

Method

Data from the large longitudinal Flemish Study on Parenting, Personality and Development were used (475 families, adolescents' M_age = 15.82, SD_age = 1.15), with both parents reporting on their interparental stress and mothers reporting on the adolescent's personality and in 2009, and emerging adults reporting on their own (mal)adaptive functioning in 2009 and 2015 and their personality in 2015.

Results

Multivariate models showed that extraversion, benevolence, emotional stability and imagination were uniquely related to (mal)adaptation across the 6‐year interval. In general, our results exhibited no consistent moderating role for adolescents' personality. Only for girls, high levels of extraversion functioned as a “susceptibility maker” in associations between father's interparental stress and self‐efficacy, and, low levels of emotional stability functioned as a “vulnerability marker” in associations between parents' interparental stress and self‐efficacy.

Conclusions

The interaction effects as well as their (restricted) generalizability across gender should be replicated before drawing firm conclusions. Adolescents' personality characteristics were important predictors of (mal)adaptation during the transition into emerging adulthood.

How does peer adversity "Get inside the Brain?" Adolescent girls' differential susceptibility to neural dysregulation of emotion following victimization

Exposure to peer victimization is a traumatic stressor, with adverse consequences for mental and physical health. This prospective, multi-method, multi-informant study investigated how victimization "gets into the brain," as reflected in neural dysregulation of emotion during adolescence. Moreover, we examined whether certain youth are particularly vulnerable to compromised neural function (i.e., a pattern of positive amygdala-right ventrolateral prefrontal cortex [rVLPFC] connectivity linked to poor emotion regulation [ER] and emotional distress) following victimization. In all, 43 adolescent girls completed an implicit ER task during a functional brain scan, and reported on rejection sensitivity. In 6th-9th grades, teachers and adolescents reported annually on victimization. Results revealed that a history of elevated victimization predicted less effective neural regulation of emotion (more positive amygdala-rVLPFC connectivity) in girls with high but not low rejection sensitivity. Consistent with a differential susceptibility model, high rejection sensitivity was associated with particularly effective neural regulation of emotion (more negative amygdala-rVLPFC connectivity) in girls with low-victimization histories. A parallel pattern emerged for a behavioral index of ER. This research provides insight into one pathway through which peer adversity undermines emotional development in ways that forecast compromised future health, and identifies youth who are at particularly high risk following peer adversity.

Differential vulnerability and susceptibility: how to make use of recent development in our understanding of mediation and interaction to tackle health inequalities

This paper discusses the concepts of vulnerability and susceptibility and their relevance for understanding and tackling health inequalities. Tackling socioeconomic inequalities in health is based on an understanding of how an individual's social position influences disease risk. Conceptually, there are two possible mechanisms (not mutually exclusive): there is either some cause(s) of disease that are unevenly distributed across socioeconomic groups (differential exposure) or the effect of some cause(s) of disease differs across groups (differential effect). Since differential vulnerability and susceptibility are often used to denote the latter, we discuss these concepts and their current use and suggest an epidemiologically relevant distinction. The effect of social position can thus be mediated by causes that are unevenly distributed across social groups and/or interact with social position. Recent improvements in the methodology to estimate mediation and interaction have made it possible to calculate measures of relevance for setting targets and priorities in policy for health equity which include both mechanisms, i.e. equalize exposure or equalize effects. We finally discuss the importance of differential susceptibility and vulnerability for the choice of preventive strategies, including approaches that target high-risk individuals, whole populations and vulnerable groups.

Developmental Adaptation to Stress: An Evolutionary Perspective

The assumption that early stress leads to dysregulation and impairment is widespread in developmental science and informs prevailing models (e.g., toxic stress). An alternative evolutionary–developmental approach, which complements the standard emphasis on dysregulation, proposes that early stress may prompt the development of costly but adaptive strategies that promote survival and reproduction under adverse conditions. In this review, we survey this growing theoretical and empirical literature, highlighting recent developments and outstanding questions. We review concepts of adaptive plasticity and conditional adaptation, introduce the life history framework and the adaptive calibration model, and consider how physiological stress response systems and related neuroendocrine processes may function as plasticity mechanisms. We then address the evolution of individual differences in susceptibility to the environment, which engenders systematic person–environment interactions in the effects of stress on development. Finally, we discuss stress-mediated regulation of pubertal development as a case study of how an evolutionary–developmental approach can foster theoretical integration.

Individual differences in developmental plasticity: A role for early androgens?

Developmental plasticity is a widespread property of living organisms, but different individuals in the same species can vary greatly in how susceptible they are to environmental influences. In humans, research has sought to link variation in plasticity to physiological traits such as stress reactivity, exposure to prenatal stress-related hormones such as cortisol, and specific genes involved in major neurobiological pathways. However, the determinants of individual differences in plasticity are still poorly understood. Here we present the novel hypothesis that, in both sexes, higher exposure to androgens during prenatal and early postnatal life should lead to increased plasticity in traits that display greater male variability (i.e., a majority of physical and behavioral traits). First, we review evidence of greater phenotypic variation and higher susceptibility to environmental factors in males; we then consider evolutionary models that explain greater male variability and plasticity as a result of sexual selection. These empirical and theoretical strands converge on the hypothesis that androgens may promote developmental plasticity, at least for traits that show greater male variability. We discuss a number of potential mechanisms that may mediate this effect (including upregulation of neural plasticity), and address the question of whether androgen-induced plasticity is likely to be adaptive or maladaptive. We conclude by offering suggestions for future studies in this area, and considering some research designs that could be used to empirically test our hypothesis.