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The first two years of life are a period of unparalleled growth and change. Within a state-of-the-art biopsychosocial framework, this innovative volume explores the multiple contexts of infant development--the ways in which genes, neurobiology, behavior, and environment interact and shape each other over time. Methods for disentangling, measuring, and analyzing complex, nonlinear developmental processes are presented. Contributors explore influences on the infant's growth in major domains, including cognitive and socioemotional functioning and mental health. The consequences of family stress

AbstractThis study examined autonomic profiles in preschoolers (N = 278, age = 4.7 years) and their relations to self‐regulation outcomes concurrently and one year later, in kindergarten. Children's sympathetic (preejection period [PEP]) and parasympathetic activity (respiratory sinus arrythmia [RSA]) were measured at rest and during cognitive and emotional tasks. Three self‐regulatory competencies were assessed: executive functions, emotion regulation and behavioral regulation. Executive functioning was measured at ages 4 and 5 using laboratory tasks designed to assess updating/working memory, inhibitory control, and cognitive flexibility. Emotion regulation was observed during emotionally distressing tasks in the laboratory, both at ages 4 and 5. Behavioral regulation and emotional reactivity were assessed via teacher ratings in kindergarten, at age 5. Latent profile analysis yielded four autonomic profiles: moderate parasympathetic inhibition (45%), reciprocal sympathetic activation (26%), coinhibition (25%), and high sympathetic activation (7%). The reciprocal sympathetic activation group showed better executive functioning in preschool and kindergarten, particularly compared to the high sympathetic activation group. The moderate parasympathetic inhibition group showed lower emotional reactivity and better behavioral regulation in kindergarten, compared to the other three groups. Findings suggest that autonomic profiles meaningfully associate with self‐regulation outcomes in early childhood, such that certain profiles relate to better self‐regulation than others.

AbstractParents' negative responsibility attributions about their child's misbehavior are related to a perception that the child has more behavior problems. This study used a dyadic framework to explore how mothers' and fathers' attributions relate to their own perceptions and to their partner's perceptions of the child's externalizing problems. Participants included 102 couples interviewed when children were 7 years old. Results confirmed that mothers reported more externalizing behavior problems in their children than did fathers, and fathers of boys reported more child behavior problems than fathers of girls. Dyadic analyses suggested that parents' negative responsibility attributions of the child's behavior were associated with greater perceptions of child externalizing problems on behalf of parents and their partners.

AbstractIn this study, we examined the hypothesis that preschoolers' performance on emotion and cognitive tasks is organized into discrete processes of control and understanding within the domains of emotion and cognition. Additionally, we examined the relations among component processes using mother report, behavioral observation, and physiological measures of emotion control. Participants were 263 children (42 percent non‐White) and their mothers. Results indicated that the three approaches of measuring emotion control were unrelated. Regardless of the measurement method, a four‐factor solution differentiating emotion control and understanding and cognitive control and understanding fits the data better than did either of two two‐factor models, one based on domains of emotion and cognition across processes, and one based on processes of control and understanding across domains. Results of this research replicate those of Leerkes et al. in describing a differentiated underlying structure of emotion and cognition processes in early childhood while also extending these conclusions across samples and across measurement approaches for assessing emotion control.

Fifty‐six mothers and their 24‐month‐old toddlers were observed on two occasions in a series of laboratory procedures designed to assess relations between emotional functioning (emotional reactivity and emotion regulation) in an individual assessment and social behavior with a same‐sex peer. Emotional reactivity was assessed using two frustration tasks designed to elicit distress. Emotional regulation was assessed by examining the child's behaviors (venting, distraction, focal‐object focus, self‐orientation, and mother‐orientation) when confronted by the two distress‐eliciting tasks. Peer play behaviors were coded for social participation and peer‐directed conflict (aggressive) behavior. The results indicated that both emotional reactivity and emotion regulation were important predictors of at least two types of social behavior: conflict and cooperation. Distress to frustration, when accompanied by high venting or high focal‐object focus, was significantly related to conflict with peers but not when accompanied by distraction, mother‐orientation or self‐focused behaviors. These findings are discussed in terms of the adaptive value of emotion regulation skills in early development, and the importance of identifying the causal relations between child regulation and early social competence.

Sixty‐five mothers and their 24‐month‐old toddlers were observed in a series of laboratory procedures designed to assess relations between maternal interactive style and emotional, behavioral and physiological regulation. Emotional regulation was assessed by examining the child's behaviors (aggression, distraction, object focus) when confronted by three emotion‐eliciting tasks. Behavioral regulation was measured by examining children's ability to comply to maternal requests and to inhibit behavior during a delay task. Physiological regulation was derived from children's cardiac vagal tone responses to emotionally‐arousing situations. Maternal interactive style was assessed by examining mothers' strategies for child behavior management (negative controlling, positive guidance) during three mother‐child tasks. Maternal behavior was related to regulation in each of the three domains. Negative maternal behavior was related to poor physiological regulation, less adaptive emotion regulation, and noncompliant behavior. Positive maternal behavior was correlated with compliance, but not with any of the physiological or emotional measures. These findings are discussed in terms of the adaptive value of self‐regulation in early development, and the importance of identifying the causal relations between maternal behavior and child regulation.

AbstractParents' responses to children's negative emotional states play a key role in the socialization of emotion regulation skills in childhood. Much of the prior research on child ER has focused on early development using cross‐sectional designs. The current study addresses these gaps by using a longitudinal design to examine individual differences of ER at two times points in middle childhood. We examined the development of children's ER by testing hypotheses about the interplay of parent response to emotions and household chaos in the prediction of individual differences in children's ER. Participants were the mothers of children at 6 and 9 years of age among 224 families in a socioeconomically diverse sample that was part of an ongoing longitudinal study. Mothers completed questionnaires regarding themselves, their children, and their home environment. Mothers' reports of better child ER at both time points were positively associated with mothers' more supportive responses and negatively associated with mothers' less non‐supportive responses, as well as lower household chaos. Chaos statistically moderated the link between non‐supportive parental responses to emotion and child ER, but only at 6 years of age. The strength of the link between child ER and non‐supportive parental responses to emotions was strong only at lower levels of household chaos. At the beginning of middle childhood, family processes linking parent responses to child emotions and children's developing ER may not function at higher levels of household chaos.

AbstractAsymmetric patterns of frontal brain electrical activity reflect approach and avoidance tendencies, with stability of relative right activation associated with withdrawal emotions/motivation and left hemisphere activation linked with approach and positive affect. However, considerable shifts in approach/avoidance‐related lateralization have been reported for children not targeted because of extreme temperament. In this study, dynamic effects of frontal electroencephalogram (EEG) power within and across hemispheres were examined throughout early childhood. Specifically, EEG indicators at 5, 10, 24, 36, 48, and 72 months‐of‐age (n = 410) were analyzed via a hybrid of difference score and panel design models, with baseline measures and subsequent time‐to‐time differences modeled as potentially influencing all subsequent amounts of time‐to‐time change (i.e., predictively saturated). Infant sex was considered as a moderator of dynamic developmental effects, with temperament attributes measured at 5 months examined as predictors of EEG hemisphere development. Overall, change in left and right frontal EEG power predicted declining subsequent change in the same hemisphere, with effects on the opposing neurobehavioral system enhancing later growth. Infant sex moderated the pattern of within and across‐hemisphere effects, wherein for girls more prominent left hemisphere influences on the right hemisphere EEG changes were noted and right hemisphere effects were more salient for boys. Largely similar patterns of temperament prediction were observed for the left and the right EEG power changes, with limited sex differences in links between temperament and growth parameters. Results were interpreted in the context of comparable analyses using parietal power values, which provided evidence for unique frontal effects.

AbstractThe current study examines whether the relation between mothers' responses to their children's negative emotions and teachers' reports of children's academic performance and social‐emotional competence are similar or different for European‐American and African‐American families. Two hundred mothers (137 European‐American, 63 African‐American) reported on their responses to their five‐year‐old children's negative emotions and 150 kindergarten teachers reported on these children's current academic standing and skillfulness with peers. Problem‐focused responses to children's negative emotions, which have traditionally been considered a supportive response, were positively associated with children's school competence for European‐American children, but expressive encouragement, another response considered supportive, was negatively associated with children's competence for African‐American children. The findings highlight the need to examine parental socialization practices from a culturally specific lens.

AbstractThis study provides the first analyses connecting individual differences in infant attention to reading achievement through the development of executive functioning (EF) in infancy and early childhood. Five‐month‐old infants observed a video, and peak look duration and shift rate were video coded and assessed. At 10 months, as well as 3, 4, and 6 years, children completed age‐appropriate EF tasks (A‐not‐B task, hand game, forward digit span, backwards digit span, and number Stroop). Children also completed a standardized reading assessment and a measure of verbal intelligence (IQ) at age 6. Path analyses on 157 participants showed that infant attention had a direct statistical predictive effect on EF at 10 months, with EF showing a continuous pattern of development from 10 months to 6 years. EF and verbal IQ at 6 years had a direct effect on reading achievement. Furthermore, EF at all time points mediated the relation between 5‐month attention and reading achievement. These findings may inform reading interventions by suggesting earlier intervention time points and specific cognitive processes (i.e. 5‐month attention).