Coordinated social behavior and positive affect shared between parent and child in early life provide a foundation for healthy social and emotional development. We examined physiological (cardiac vagal responses) and relational (attachment security) predictors of dyadic behavioral coordination in a sample of 13-month-old infants and their mothers (N = 64). We tested whether cardiac vagal responses moderated the association between attachment security and behavioral coordination. The main effect of attachment on coordination was moderated by infant cardiac vagal tone (i.e., respiratory sinus arrhythmia [RSA] during rest). Securely attached infants with lower cardiac vagal tone were more behaviorally coordinated with their mothers; there was no association between attachment and coordination for infants with high cardiac vagal tone. Infants with greater increases in cardiac vagal reactivity (i.e., RSA during social engagement) exhibited greater behavioral coordination with their mothers regardless of attachment status. There were no effects for maternal cardiac vagal responses. These results illustrate how individual differences in physiological responses inform healthy early social-emotional functioning.

Parents often try to hide their negative emotions from their kids, hoping to protect them from experiencing adverse responses. However, suppression has been linked with poor social interactions. Suppression may be particularly damaging in the context of parent-child relationships because it may hinder parents' ability to support children's emotion regulation. Immediately after completing a stressful task, 109 parents of 7 to 11 year olds were randomly assigned to a suppression condition or a control condition during an interaction with their child. Children were given a set of instructions with pictures to build a Lego house and told to verbally instruct their parent without touching the Legos themselves. Trained research assistants coded parents' and children's positive and negative mood, responsiveness, warmth, parents' guidance, and the quality of the interaction. We found that suppression decreased parents' observed positive mood, responsiveness, warmth, and guidance, as well as children's observed positive mood, responsiveness, and warmth, and decreased the overall dyadic interaction quality. However, parent sex played a significant role in moderating these effects. Fathers in the suppression condition were less responsive and warm than control fathers, though children interacting with their fathers did not exhibit decrements in responsiveness or warmth. In contrast, children of suppressing mothers appeared less warm than children of mothers in the control condition, though suppressing mothers did not exhibit decrements in their observed warmth or responsiveness relative to control mothers. Taken together, these findings suggest that the desire to hide one's feelings from one's children may have unwanted negative consequences but may differ for fathers versus mothers. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

The study of autonomic nervous system responses and contextual factors has shed light on the development of children's negative outcomes, but the majority of these studies have not focused on minority populations living under adversity. To address these gaps, the current longitudinal study included a sample of poor, immigrant Latino families to examine whether associations between children's autonomic nervous system reactivity at 6 months and their externalizing behavior problems at 7 years of age were moderated by two risk factors associated with poverty: the interpersonal factor of chronic maternal depression and the environmental factor of chronic overcrowded housing. Multiple linear regression (N = 99) revealed that children who exhibited less parasympathetic nervous system withdrawal in response to challenge during infancy had more externalizing problems during childhood only if they had mothers who experienced chronic depression. Children who exhibited greater sympathetic nervous system reactivity during infancy had the lowest levels of externalizing problems during childhood only if they had mothers who chronic depression. Chronic overcrowded housing did not moderate associations between physiological reactivity and level of externalizing problems. These findings extend our understanding of the interaction of physiology and context on child outcomes to the understudied population of impoverished Latino families.

Emotions are not simply concepts that live privately in the mind, but rather affective states that emanate from the individual and may influence others. We explored affect contagion in the context of one of the closest dyadic units, mother and infant. We initially separated mothers and infants; randomly assigned the mothers to experience a stressful positive-evaluation task, a stressful negative-evaluation task, or a nonstressful control task; and then reunited the mothers and infants. Three notable findings were obtained: First, infants' physiological reactivity mirrored mothers' reactivity engendered by the stress manipulation. Second, infants whose mothers experienced social evaluation showed more avoidance toward strangers compared with infants whose mothers were in the control condition. Third, the negative-evaluation condition, compared with the other conditions, generated greater physiological covariation in the dyads, and this covariation increased over time. These findings suggest that mothers' stressful experiences are contagious to their infants and that members of close pairs, like mothers and infants, can reciprocally influence each other's dynamic physiological reactivity.

This study examined the association between the security of attachment and processes influencing the development of emotion regulation in young children. A sample of 73 4 1/2-year-olds and their mothers were observed in an emotion regulation probe involving mild frustration for children, and mothers and children were later independently interviewed about how the child had felt. Fewer than half the mothers agreed with children’s self-reports in the emotion they attributed to children (a lower rate than the concordance of observer ratings with children’s self-reports), and higher mother-child concordance was associated with secure attachment and mother’s beliefs about the importance of attending to and accepting their own emotions. Mother-child conversations about recent events evoking children’s negative emotion were also analyzed. Children were less likely to avoid conversing about negative feelings when they were in secure attachments and when mothers were more validating of the child’s perspective. Children’s greater understanding of negative emotions was also significantly associated with higher mother-child concordance and less child conversational avoidance. Taken together, these findings underscore the multiple influences of attachment on emotion regulation and the importance of children’s emotion understanding to these processes.

Parents can influence children's emotional responses through direct and subtle behavior. In this study we examined how parents' acute stress responses might be transmitted to their 7- to 11-year-old children and how parental emotional suppression would affect parents' and children's physiological responses and behavior. Parents and their children (N = 214; N_dyads = 107; 47% fathers) completed a laboratory visit where we initially separated the parents and children and subjected the parent to a standardized laboratory stressor that reliably activates the body's primary stress systems. Before reuniting with their children, parents were randomly assigned to either suppress their affective state-hide their emotions from their child-or to act naturally (control condition). Once reunited, parents and children completed a conflict conversation and two interaction tasks together. We measured their sympathetic nervous system (SNS) responses and observed interaction behavior. We obtained three key findings: (a) suppressing mothers' SNS responses influenced their child's SNS responses; (b) suppressing fathers' SNS responses were influenced by their child's SNS responses; and (c) dyads with suppressing parents appeared less warm and less engaged during interaction than control dyads. These findings reveal that parents' emotion regulation efforts impact parent-child stress transmission and compromise interaction quality. Discussion focuses on short-term and long-term consequences of parental emotion regulation and children's social-emotional development. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Mothers and their babies represent one of the closest dyadic units and thus provide a powerful paradigm to examine how affective states are shared, and result in, synchronized physiologic responses between two people. We recruited mothers and their 12- to 14-month-old infants (Ndyads = 98) to complete a lab study in which mothers were initially separated from their infants and assigned to either a low-arousal positive/relaxation condition, intended to elicit parasympathetic nervous system (PNS) reactivity, or a high-arousal negative/stress task, intended to elicit sympathetic nervous system (SNS) reactivity. Upon reunion, infants were placed either on their mothers' laps (touch condition) or in a high chair next to the mother (no-touch condition). We then examined if the babies SNS and/or PNS responses changed from their baseline levels and how the dyads' physiological responses-both PNS and SNS responses-synchronized over time as a function of mothers' affect manipulation and touch condition. Three noteworthy findings were observed. First, infants of mothers assigned to the relaxation task showed greater PNS increases and PNS covariation. Second, infants of mothers assigned to the stress task showed stronger SNS covariation with their mothers over time. Finally, infants who sat on their mothers' laps (i.e., touch condition) showed stronger SNS covariation than those in the no-touch condition. Taken together, these results suggest that mothers' affective states-low-arousal positive states as well as high-arousal negative states-can be "caught" by their infants, and that touch can play a critical role in stress contagion. (PsycINFO Database Record