Foster Care Leads to Lower Irritability Among Adolescents with a History of Early Psychosocial Deprivation.

Irritability reflects a propensity for frustration and anger, and is a transdiagnostic symptom of both externalizing and internalizing psychopathology. While early adverse experiences are associated with higher levels of irritability, experiences of early psychosocial deprivation and whether family-based placements can mitigate the impact on subsequent irritability, remain underexplored. The current study examined irritability in 107 16-year-olds with a history of institutional care from a randomized controlled trial of foster care as an alternative to institutional care and 49 community comparison children. At age 16 years, irritability was assessed using parent- and self-report forms of the Affective Reactivity Index. Compared to community adolescents, those with a history of institutional care exhibited significantly elevated irritability levels. Among those who experienced institutional care, those randomized to foster care had lower levels of irritability compared to participants randomized to the care-as-usual group, and this effect persists after controlling for baseline negative emotionality. These findings suggest a causal link between high-quality foster care and lower irritability following psychosocial deprivation. Additionally, longer duration in institutional care and non-family placement at age 16 years were associated with higher levels of irritability, highlighting the role of caregiving in explaining variation in irritability in adolescence. Policies that support long-term, high-quality family placements for children without regular caregivers should be prioritized.

Stressful life events and prenatal representations of the child.

Caregivers' mental representations of their children can be assessed prenatally and are prospectively associated with later caregiving quality and caregiver-child attachment. Compared to balanced, distorted or disengaged representations are linked to insecure caregiver-child attachments. The present study explored factors (i.e. stressful life experiences and positive experiences) that may be linked to risk for distorted and disengaged representations. We used a brief version of the Prenatal Working Model of the Child Interview in a sample of 298 pregnant people (ages 19 to 45 years; M = 30.83, SD = 5.00) between gestational age 11-38 weeks (M = 23.49, SD = 5.70). A greater number of stressful events across three developmental periods (i.e., lifespan, childhood, and pregnancy) were related to increased odds of distorted, compared to balanced classification. Pregnancy stress had the largest association. Positive experiences from childhood did not buffer the association between stress and representations. Findings highlight the importance of stress on prenatal representations of one's child.

Evidence for Changes in Screen Use in the United States During Early Childhood Related to COVID-19 Pandemic Parent Stressors: Repeated Cross-Sectional Study.

BACKGROUND: The COVID-19 pandemic transformed the home lives of many families in the United States, especially those with young children. Understanding the relationship between child and parent screen time and family stressors exacerbated by the pandemic may help inform interventions that aim to support early child development. OBJECTIVE: We aim to assess the changing relationship between family screen time and factors related to pandemic-induced remote work and childcare or school closures. METHODS: In the spring of 2021 we administered a survey, similar to one administered in the spring of 2019, to a national sample of parents of young children (aged 6 to 60 months). Using iterative sampling with propensity scores, we recruited participants whose sociodemographic characteristics matched the 2019 survey. Participants were aged >18 years, proficient in English or Spanish, and residing in the United States. The main outcomes were changes in child screen time (eg, mobile phone, tablet, computer, and television) and parenting technoference, defined as perceived screen-related interference with parent-child interactions. Additional survey items reported pandemic-related job loss, and changes to work hours, work location, caregiving responsibilities, day care or school access, and family health and socioeconomic status. RESULTS: We enrolled 280 parents, from diverse backgrounds. Parents reported pandemic-related changes in child screen time (mean increase of 1.1, SD 0.9 hours), and greater parenting technoference (3.0 to 3.4 devices interfering per day; P=.01). Increased child screen time and parenting technoference were highest for parents experiencing job loss (mean change in child screen time 1.46, SD 1.03; mean parenting technoference score 3.89, SD 2.05), second highest for working parents who did not lose their job (mean change in child screen time 1.02, SD 0.83; mean parenting technoference score 3.37, SD 1.94), and lowest for nonworking parents (mean change in child screen time 0.68, SD 0.66; mean parenting technoference score 2.66, SD 1.70), with differences significant at P<.01. School closure and job loss were most associated with increased child screen time during the pandemic after controlling for other stressors and sociodemographic characteristics (d=0.52, P<.001; d=0.31, P=.01). Increased child screen time and school closure were most associated with increased parenting technoference (d=0.78, P<.001; d=0.30, P=.01). CONCLUSIONS: Work and school changes due to the COVID-19 pandemic were associated with increased technology interference in the lives of young children. This study adds to our understanding of the interaction between technology use at home and social factors that are necessary to support early childhood health and development. It also supports possible enhanced recommendations for primary care providers and childcare educators to guide parents in establishing home-based "screen time rules" not only for their children but also for themselves.

Caregiving relationships are a cornerstone of developmental psychopathology.

The interdisciplinary field of developmental psychopathology has made great strides by including context into theoretical and empirical approaches to studying risk and resilience. Perhaps no context is more important to the developing child than their relationships with their caregivers (typically a child's parents), as caregivers are a key source of stimulation and nurturance to young children. Coupled with the high degree of brain plasticity in the earliest years of life, these caregiving relationships have an immense influence on shaping behavioral outcomes relevant to developmental psychopathology. In this article, we discuss three areas within caregiving relationships: (1) caregiver-child interactions in everyday, naturalistic settings; (2) caregivers' social cognitions about their child; and (3) caregivers' broader social and cultural context. For each area, we provide an overview of its significance to the field, identify existing knowledge gaps, and offer potential approaches for bridging these gaps to foster growth in the field. Lastly, given that one value of a scientific discipline is its ability to produce research useful in guiding real-world decisions related to policy and practice, we encourage developmental psychopathology to consider that a focus on caregiving, a modifiable target, supports this mission.

Biomarker adoption in developmental science: A data-driven modelling of trends from 90 biomarkers across 20 years.

Developmental scientists have adopted numerous biomarkers in their research to better understand the biological underpinnings of development, environmental exposures, and variation in long-term health. Yet, adoption patterns merit investigation given the substantial resources used to collect, analyse, and train to use biomarkers in research with infants and children. We document trends in use of 90 biomarkers between 2000 and 2020 from approximately 430,000 publications indexed by the Web of Science. We provide a tool for researchers to examine each of these biomarkers individually using a data-driven approach to estimate the biomarker growth trajectory based on yearly publication number, publication growth rate, number of author affiliations, National Institutes of Health dedicated funding resources, journal impact factor, and years since the first publication. Results indicate that most biomarkers fit a "learning curve" trajectory (i.e., experience rapid growth followed by a plateau), though a small subset decline in use over time.

[Formula: see text] Neural and behavioral indicators of cognitive control in preschoolers with and without prenatal opioid exposure.

Prenatal opioid exposure is one consequence of the opioid epidemic, but effects on child development remain poorly understood. There is emerging evidence that children exposed to opioids in utero exhibit elevated emotional and behavioral problems, which may be partially due to alterations in cognitive control. Using multiple methods (i.e., neuropsychological, behavioral, and event-related potential [ERP] assessments), the present study examined differences in emotional, behavioral, and cognitive control difficulties in preschool-aged children with (n = 21) and without (n = 23) prenatal opioid exposure (Mage = 4.30, SD = 0.77 years). Child emotional and behavioral problems were measured with a caregiver questionnaire, indicators of cognitive control were measured using developmentally appropriate behavioral (i.e., delay discounting, Go/No-Go) and neuropsychological (i.e., Statue) tasks, and electroencephalogram was recorded to error and correct responses in a Go/No-Go task. ERP analyses focused on the error-related negativity (ERN), an ERP that reflects error monitoring, and correct-response negativity (CRN), a component reflecting performance monitoring more generally. Opioid exposure was associated with elevated difficulties across domains and a blunted ERN, reflecting altered cognitive control at the neural level, but groups did not significantly differ on behavioral measures of cognitive control. These result replicate prior studies indicating an association between prenatal opioid exposure and behavioral problems in preschool-aged children. Further, our findings suggest these differences may be partially due to children with prenatal opioid exposure exhibiting difficulties with cognitive control at the neural level. The ERN is a potential target for future research and intervention efforts to address the sequelae of prenatal opioid exposure.

Telomere Erosion and Depressive Symptoms Across Development Following Institutional Care.

OBJECTIVE: A large literature has identified exposure to early caregiving adversities as a potent risk for developing affective psychopathology, with depression, in particular, increasing across childhood into adolescence. Evidence suggests telomere erosion, a marker of biological aging, may underlie associations between adverse early-life experiences and later depressive behavior; yet, little is understood about this association during development. METHOD: The current accelerated longitudinal study examined concurrent telomere length and depressive symptoms concurrently, 2 and 4 years later, from the preschool period through adolescence among children exposed (n =116) and not exposed (n = 242) to early previous institutional (PI) care. RESULTS: PI care was associated with shorter telomeres on average and with quadratic age-related growth in depressive symptoms, indicating a steeper association between PI care and depressive symptoms in younger age groups that leveled off in adolescence. Contrary to studies in adult samples, telomere length was not associated with depressive symptoms, and it did not predict future symptoms. CONCLUSION: These findings indicate that early caregiving disruptions increase the risk for both accelerated biological aging and depressive symptoms, although these variables did not correlate with each other during this age range.

Concurrent and prospective associations between infant frontoparietal and default mode network connectivity and negative affectivity.

Emotion dysregulation is linked to differences in frontoparietal (FPN) and default mode (DMN) brain network functioning. These differences may be identifiable early in development. Temperamental negative affectivity has been identified as a precursor to later emotion dysregulation, though the underlying neurodevelopmental mechanism is unknown. The present study explores concurrent and prospective associations between FPN and DMN connectivity in infants and measures of negative affectivity. 72 infants underwent 5.03-13.28 min of resting state fMRI during natural sleep (M±SD age=4.90 ± 0.84 weeks; 54% male; usable data=9.92 ± 2.15 min). FPN and DMN intra- and internetwork connectivity were computed using adult network assignments. Crying was obtained from both parent-report and day-long audio recordings. Temperamental negative affectivity was obtained from a parent-report questionnaire. In this preregistered study, based on analyses conducted with a subset of this data (N = 32), we hypothesized that greater functional connectivity within and between FPN and DMN would be associated with greater negative affectivity. In the full sample we did not find support for these hypotheses. Instead, greater DMN intranetwork connectivity at age one month was associated with lower concurrent parent-reported crying and temperamental negative affectivity at age six months (ßs>-0.35, ps<.025), but not crying at age six months. DMN intranetwork connectivity was also negatively associated with internalizing symptoms at age eighteen-months (ß=-0.58, p = .012). FPN intra- and internetwork connectivity was not associated with negative affectivity measures after accounting for covariates. This work furthers a neurodevelopmental model of emotion dysregulation by suggesting that infant functional connectivity at rest is associated with later emotional functioning.

Identifying what works for whom: Implementation outcomes following iLookOut, a child abuse identification and referral training program.

Introduction: iLookOut, a web-based child abuse training for early childcare professionals (ECPs), has been shown to improve knowledge and attitudes related to correctly identifying and reporting suspected cases of child abuse. The overarching goal of the present study is to examine "what works for whom" for iLookOut in order to identify strategies for optimizing learner outcomes. Methods: This prospective study enrolled 12,705 ECPs who completed iLookOut (November 2014-December 2018). We used structural equation models to test whether learner demographic and professional characteristics were differentially associated with implementation outcomes (i.e., acceptability and appropriateness) and whether these mediated subsequent indicators of training effectiveness (i.e., gains in knowledge). Results: Consistent with previous research, individuals with lower baseline knowledge scores showed greater knowledge gains (ß = -.57; p < .001). Greater knowledge gains were seen for learners who reported higher acceptability (ß = .08; p < .001) or appropriateness (ß = .14; p < .001). Implementation outcomes strongly associated with knowledge gains included acceptability for female learners and appropriateness for learners who had not completed high school or had >15 years of experience in childcare settings. Where mediation was found, for the majority of groups, appropriateness emerged as the driving mediator. Conclusion: Implementation outcomes emerged as important drivers of knowledge change for most groups. The iLookOut Core Training's use of a multimedia learning environment, video-based storylines, and game-based techniques were endorsed by learners and correlated with increases in knowledge. Future work should explore why aspects of the iLookOut training are rated as less acceptable or appropriate by some groups and what changes would improve efficacy for low performing learners.

Neural reactivity to infant emotion cues during pregnancy: Associations with peripartum anxiety and depressive symptoms.

BACKGROUND: Pregnancy is marked by physiological and psychosocial changes for women, and event-related potentials (ERP) are comfortable and safe for examining brain function across pregnancy. The late positive potential (LPP) ERP, a measure of allocated attention to emotional stimuli, may provide insight into associations between internalizing symptoms and neural processing of infant emotion cues, which may be particularly salient in this life stage. METHODS: We developed a task to examine neural and behavioral responses to infant faces in pregnant women (N = 120, Mage=31.09, SD=4.81), the impact of auditory infant cries on the LPP to faces, and associations between the LPP and anxiety and depressive symptoms. Participants matched distressed, happy, and neutral infant faces and shapes as a comparison condition with interspersed auditory conditions (infant cry sounds vs. white noise) while electroencephalogram data were collected. Participants also completed self-report measures of anxiety and depressive symptoms. RESULTS: Reaction time (RT) was faster for the infant cry vs. white noise condition and when matching shapes vs. infant faces. Depressive symptoms were associated with slower RTs to neutral infant faces. The LPP was enhanced overall to faces vs. shapes, but there was no main effect of auditory condition. Anxiety symptoms were associated with an enhanced LPP to infant distressed faces in the infant cry condition. CONCLUSIONS: Results support these methods for measuring neural and behavioral responses to infant emotional cues in pregnancy and provide evidence that combinations of auditory and visual stimuli may be particularly useful for capturing emotional processes relevant to anxiety.

Infant Placement and Language Exposure in Daily Life.

Children's daily contexts shape their experiences. In this study we assessed whether variations in infant placement (e.g., held, bouncy seat) are associated with infants' exposure to adult speech. Using repeated survey sampling of mothers and continuous audio recordings, we tested whether use of independence-supporting placements was associated with adult speech exposure in a Southeastern U.S. sample of 60 4- to 6- month- old infants (38% male, predominately White, not Hispanic/Latinx, from higher SES households). Within-subject analyses indicated that independence-supporting placements were associated with exposure to fewer adult words in the moment. Between-subjects analyses indicated that infants more frequently reported to be in independence-supporting placements that also provided posture support (i.e., exersaucer) were exposed to fewer adult words and less consistent adult speech across the day. These findings indicate that infants' opportunities for exposure to adult speech "in the wild" may vary based on immediate physical context.

Teaching or learning from baby: Inducing explicit parenting goals influences caregiver intrusiveness.

Caregivers' goals influence their interactions with their children. In this preregistered study, we examined whether directing parents to teach their baby versus learn from their baby influenced the extent to which they engaged in intrusive (e.g., controlling, adult-centered rather than child-centered), sensitive, warm, or cognitively stimulating caregiving behaviors. Mothers and their 6-month-old infants (N = 66; 32 female infants) from the San Francisco Bay Area participated in a 10-min "free-play" interaction, coded in 2-min epochs for degree of parental intrusiveness. Prior to the final epoch, mothers were randomly assigned to receive instructions to focus on (a) teaching something to their infant or (b) learning something from their infant. A control group of mothers received no instructions. Analyses of within-person changes in intrusive behavior from before to after receiving these instructions indicated that mothers assigned to teach their infant increased in intrusiveness whereas mothers assigned to learn from their infant and mothers in the control group did not significantly change in intrusiveness. The study provides experimental evidence that caregivers' explicit goals to teach infants result, on average, in more controlling and adult-centered caregiving behavior. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Self-supervised learning with application for infant cerebellum segmentation and analysis.

Accurate tissue segmentation is critical to characterize early cerebellar development in the first two postnatal years. However, challenges in tissue segmentation arising from tightly-folded cortex, low and dynamic tissue contrast, and large inter-site data heterogeneity have limited our understanding of early cerebellar development. In this paper, we propose an accurate self-supervised learning framework for infant cerebellum segmentation. We validate its accuracy using 358 subjects from three datasets. Our results suggest the first six months exhibit the most rapid and dynamic changes, with gray matter (GM) playing a dominant role in cerebellar growth over white matter (WM). We also find both GM and WM volumes are larger in males than females, and GM and WM volumes are larger in autistic males than neurotypical males. Application of our method to a larger population will fuel more cerebellar studies, ultimately advancing our comprehension of its structure and function in neurotypical and disordered development.

Resting brain activity in early childhood predicts IQ at 18 years.

Resting brain activity has been widely used as an index of brain development in neuroscience and clinical research. However, it remains unclear whether early differences in resting brain activity have meaningful implications for predicting long-term cognitive outcomes. Using data from the Bucharest Early Intervention Project (Zeanah et al., 2003), we examined the impact of institutional rearing and the consequences of early foster care intervention on 18-year IQ. We found that higher resting theta electroencephalogram (EEG) power, reflecting atypical neurodevelopment, across three assessments from 22 to 42 months predicted lower full-scale IQ at 18 years, providing the first evidence that brain activity in early childhood predicts cognitive outcomes into adulthood. In addition, both institutional rearing and later (vs. earlier) foster care intervention predicted higher resting theta power in early childhood, which in turn predicted lower IQ at 18 years. These findings demonstrate that experientially-induced changes in brain activity early in life have profound impact on long-term cognitive development, highlighting the importance of early intervention for promoting healthy development among children living in disadvantaged environments.

A Comprehensive Multilevel Analysis of the Bucharest Early Intervention Project: Causal Effects on Recovery From Early Severe Deprivation.

OBJECTIVE: The Bucharest Early Intervention Project is the first randomized controlled trial of foster care as an alternative to institutional care. The authors synthesized data from nearly 20 years of assessments of the trial to determine the overall intervention effect size across time points and developmental domains. The goal was to quantify the overall effect of the foster care intervention on children's outcomes and examine sources of variation in this effect, including domain, age, and sex assigned at birth. METHODS: An intent-to-treat approach was used to examine the causal effects of the randomized controlled trial for 136 children residing in institutions in Bucharest, Romania (baseline age, 6-31 months) who were randomly assigned to either foster care (N=68) or care as usual (N=68). At ages 30, 42, and 54 months and 8, 12, and 16-18 years, children were assessed for IQ, physical growth, brain electrical activity (EEG), and symptoms of five types of psychopathology. RESULTS: Participants provided 7,088 observations across follow-up waves. Children assigned to foster care had better cognitive and physical outcomes and less severe psychopathology than did those who received care as usual. The magnitude of these effect sizes remained stable across development. The foster care intervention most influenced IQ and disorders of attachment/social relatedness. CONCLUSIONS: Young children benefit from placement in families after institutional care. The benefits of foster care for previously institutionalized children were remarkably stable across development.

Parents' emotion socialization behaviors in response to preschool-aged children's justified and unjustified negative emotions.

Parental socialization of children's negative emotions is believed to contribute to children's emotional development, with supportive, process-oriented responses (e.g., explicit acknowledgment of emotional expression and emotion processing) providing opportunities for children to experience and develop adaptive emotion regulation strategies for negative emotions. On the other hand, non-supportive, outcome-oriented responses (e.g., minimizing or punishing children for negative emotional expressions) tend to undermine such opportunities. Less clear, however, is the degree to which parents' own emotional and cognitive processes influence their emotion socialization behaviors. In particular, the perceived justifiability of children's negative emotions may be an important factor for parents' socialization behaviors as parents may only attend to emotional displays that they feel are reasonable. Using a sample of 234 mothers and fathers (parents of 146 unique preschool aged children), we examined the degree to which parents reported: (1) feeling specific emotions as a function of whether they viewed children's negative emotional expressions; (2) engaging in emotion socialization behaviors as a function of whether they viewed children's negative emotions. Last, we examined whether parents' reported emotions were related to their behaviors. For caregivers' emotions and behaviors, we examined whether patterns differed as a function of whether the children's emotions were perceived as justified or unjustified. Parents were more likely to report feeling emotions such as anger and frustration when they viewed children's negative emotions as unjustified relative to justified, and for these unjustified negative emotions, anger and frustration were related to more outcome-oriented behaviors. Emotions such as sadness and guilt, however, were related to more process-oriented behaviors, regardless of whether parents felt children's negative emotions were justified or unjustified. Findings highlight the interrelatedness of emotional and cognitive processes within the parenting context and their potential influence on emotion socialization behaviors.

What's the matter with ACEs? Recommendations for considering early adversity in educational contexts.

BACKGROUND: Currently, some trauma-informed education practices use "ACE scores," a number that represents the sum of endorsed items from a survey derived from the Adverse Childhood Experiences (ACEs) study in 1998. We caution that the survey provides limited information within education, and such scores have limited utility for designing and delivering individualized intervention to support students who have experienced adversity. OBJECTIVE: We sought to illustrate why ACEs are not well-suited for use in trauma-informed education, provide definitions for adversity-related terms from which a broader and common understanding of adversity can stem, and provide recommendations for integration of adversity-informed approaches to the educational context. METHODS: We compiled definitions of adversity-related constructs and made recommendations based on review of relevant research from the fields of psychology and education. RESULTS: Rather than tailoring educational practices to specific children based on the "traumatic" events they experience, we recommend educators focus their efforts on building supportive classrooms geared toward supporting students with best practices drawn from the Science of Learning, and with the understanding that early adversity can influence heterogeneous trajectories in student development and behavior. In addition, further research on educational practices, including the use of a shared language for describing and defining adversity-related experiences, are the concrete steps needed to better support a goal of adversity-informed education.

Caregivers' positive emotion socialization tendencies are associated with positive affect in preschool age children.

Longstanding theories of emotion socialization postulate that caregiver emotional and behavioral reactions to a child's emotions together shape the child's emotion displays over time. Despite the notable importance of positive valence system function, the majority of research on caregiver emotion socialization focuses on negative valence system emotions. In the current project, we leveraged a relatively large cross-sectional study of caregivers (N = 234; 93.59% White) of preschool aged children to investigate whether and to what degree, caregiver (1) emotional experiences, or (2) external behaviors, in the context of preschoolers' positive emotion displays in caregiver-child interactions, are associated with children's general positive affect tendencies. Results indicated that, in the context of everyday caregiver-child interactions, caregiver-reported positively valenced emotions but not approach behaviors were positively associated with child general positive affect tendencies. However, when examining specific caregiver behaviors in response to everyday child positive emotion displays, caregiver report of narrating the child's emotion and joining in the emotion with their child was positively associated with child general positive affect tendencies. Together, these results suggest that in everyday caregiver-child interactions, caregivers' emotional experiences and attunement with the child play a role in shaping preschoolers' overall tendencies toward positive affect.

Las teorías de socialización de la emoción que han existido por mucho tiempo postulan que las reacciones emocionales y de comportamiento de quien presta el cuidado ante las emociones del niño juntas le dan forma a la emoción que el niño muestra a través del tiempo. A pesar de la notable importancia de la función del sistema positivo de valores, la gran mayoría de la investigación acerca de la socialización de la emoción de quien presta cuidado se enfoca en emociones del sistema negativo de valores. En el presente proyecto, aprovechamos un estudio transversal relativamente grande de quienes prestan cuidado (N = 234; 93.59% blancos) a niños de edad prescolar para investigar si y hasta qué punto (1) las experiencias emocionales de quien presta el cuidado, o (2) los comportamientos externos dentro del contexto de la emoción positiva mostrada por los prescolares en las interacciones cuidador-niño, se asocian con las generales tendencias afectivas positivas de los niños. Los resultados indicaron que, dentro del contexto de las interacciones cuidador-niño diarias, las emociones de valores positivamente reportadas por el cuidador, pero no así las conductas de acercamiento, fueron positivamente asociadas con las generales tendencias afectivas positivas del niño. Sin embargo, cuando se examinaron los específicos comportamientos del cuidador como respuesta a las muestras diarias de emociones positivas del niño, el reporte del cuidador al narrar la emoción del niño y el unirse en la emoción con el niño, fueron positivamente asociados con las generales tendencias afectivas positivas del niño. Juntos, estos resultados sugieren que, en las interacciones diarias entre cuidador y niño, las experiencias emocionales del cuidador y la compenetración con el niño juegan un papel en el proceso de darle forma a las generales tendencias de los prescolares hacia el afecto positivo.

Les théories de la socialisation de l'émotion qui existent de longue date postulant que les réactions émotionnelles et comportementales aux émotions d'un enfant des modes de soin forment la manière dont l'émotion de l'enfant s'affiche au fil du temps. En dépit de l'importance notable d'un système de fonction de valence positive, la plus grande partie des recherches sur la socialisation de l'émotion de la personne prenant soin d'un enfant se concentrent sur le système d'émotions de valence négative. Dans ce projet nous avons tiré parti une assez grande étude de coupe transversale de personnes prenant soin d'un enfant (N = 234; 93,59% blanches) d'enfant d'âge préscolaire afin de découvrir si et à quel degré (1) les expériences émotionnelles ou (2) les comportements externes de la personne prenant soin de l'enfant dans le contexte de l'affichage de l'émotion positive des enfants d'âge préscolaire dans les interactions personne prenant soin de l'enfant-enfant sont liées aux tendances générales de l'affect positif des enfants. Les résultats ont indiqué que, dans le contexte de la journée typique de la personne prenant soin de l'enfant, les interactions de l'enfant, les émotions avec une valence positive rapportées par la personne prenant soin de l'enfant mais non les comportements d'approche étaient liés de manière positive avec tendances générales de l'affect positif de l'enfant. Cependant, en examinant les comportements spécifiques des personnes prenant soin de l'enfant en réponse aux affichages de l'émotion positive de l'enfant chaque jour, le compte rendu de l'émotion de l'enfant fait par la personne en prenant soin et de sa participation à l'émotion avec leur enfant était liée de manière positive aux tendances générales de l'affect positif de l'enfant. Tous ensemble, ces résultats suggèrent que dans les interactions de chaque jour de la personne prenant soin de l'enfant et l'enfance, les expériences émotionnelles des personnes prenant soin de l'enfant et l'harmonisation avec l'enfant jouent un rôle dans la construction des tendances générales des enfants d'âge préscolaire vers un affect positif.