Parasympathetic reactivity and disruptive behavior problems in young children during interactions with their mothers and other adults: A preliminary investigation

Family cohesion moderates the inverted U-shaped curve between resting RSA and children's empathy

Resting respiratory sinus arrhythmia (RSA) and family cohesion may jointly influence children's empathy. Resting RSA has been found to exhibit an inverted U-shaped relation with empathy, and family cohesion is a psychosocial correlate of children's empathy that may moderate this relation. The present study recruited 182 first-grade children as participants (87 girls, Mage = 7.02, SDage = 0.36). Parents completed questionnaires to assess family cohesion and children's empathy. The SOMNOtouch RESP device was utilized to collect resting electrocardiogram data and calculate resting RSA. The results showed that family cohesion significantly moderated the inverted U-shaped curve between resting RSA and children's empathy. High family cohesion served as a protective factor in mitigating the negative impact of high resting RSA on empathy but could not buffer the negative effect of extremely low resting RSA on empathy among children. The findings suggest a role for high family cohesion in promoting empathy in children with moderate to high resting RSA.

Physiological and communicative emotional disconcordance in children on the autism spectrum

BACKGROUND

Individuals on the autism spectrum commonly have differences from non-autistic people in expressing their emotions using communicative behaviors, such as facial expressions. However, it is not yet clear if this reduced expressivity stems from reduced physiological reactivity in emotional contexts or if individuals react internally, but do not show these reactions externally to others. We hypothesized that autism is characterized by a discordance between in-the-moment internal psychophysiological arousal and external communicative expressions of emotion.

METHODS

Forty-one children on the autism spectrum and 39 non-autistic, typically developing (TD) children of two age groups (2-4 and 8-12 years) participated in a low-level stress task whilst wearing a wireless electrocardiogram. Children's negative emotional expressions (facial, vocal, bodily) were coded following standardized protocols. Alexithymia traits were assessed using the Children's Alexithymia Measure with school-aged children only. Data analyses involved ANOVAs, correlations, and sensitivity analyses.

RESULTS

There were no group differences in physiological arousal (heart rate) or in communicative expressions of stress to the stress task. For TD preschoolers, physiological arousal during the stress task was associated with vocal expressions and for TD school-aged children, they were associated with facial and bodily expressions. By contrast, for children on the autism spectrum, physiological arousal during the stress tasks was not associated with communicative expressions across age groups.

CONCLUSIONS

Our findings suggest that children on the autism spectrum might experience emotional disconcordance, in that their physiological arousal does not align with their communicative expressions. Therefore, the internally experienced stress of children on the autism spectrum may be inadvertently missed by teachers and caregivers and, consequently, learning opportunities for teaching emotional communication and regulation may be also missed. Our results support the use of wearable biosensors to facilitate such interventions in children on the autism spectrum.

Measuring Irritability in Early Childhood: A Psychometric Evaluation of the Affective Reactivity Index in a Clinical Sample of 3- to 8-Year-Old Children

The parent-report Affective Reactivity Index (ARI-P) is the most studied brief scale specifically developed to assess irritability, but relatively little is known about its performance in early childhood (i.e., ≤8 years). Support in such populations is particularly important given developmental shifts in what constitutes normative irritability across childhood. We examined the performance of the ARI-P in a diverse, treatment-seeking sample of children ages 3 to 8 years (N = 115; mean age = 5.56 years; 58.4% from ethnic/racial minority backgrounds). In this sample, confirmatory factor analysis supported the single-factor structure of the ARI-P previously identified with older youth. ARI-P scores showed large associations with another irritability index, as well as small-to-large associations with aggression, anxiety, depression, and attention problems, supporting the convergent and concurrent validity of the ARI-P when used with children in this younger age range. Findings support the ARI-P as a promising parent-report tool for assessing irritability in early childhood, particularly in clinical samples.

Preschoolers' dynamic respiratory sinus arrhythmia (RSA) change during a challenging parent-child interactive task: Relations with preschoolers' socioemotional health

Respiratory sinus arrhythmia (RSA) is a biomarker of physiological functioning that has been implicated in self-regulatory processes and shown to relate to children's socioemotional health. RSA is a dynamic process reflecting an individual's response to their environment; thus, temporally sensitive methods are critical to better understanding this self-regulatory process in different contexts. Prior work has studied young children's RSA change in the context of emotion clips and interactions with a stranger. The present study meaningfully expanded upon this work by examining: (a) preschoolers' dynamic RSA change during a challenging task with their mothers, and (b) factors that may explain variability in children's dynamic RSA change. Preschoolers (N = 108; M_age  = 3.56 years) and their mothers from diverse backgrounds completed a challenging activity together while children's physiological activity was monitored. Mothers reported on children's positive affect, parent emotional support, and family cohesion and indicators of socioemotional health. Children's positive affect and family cohesion explained variability in children's dynamic RSA change, which concurrently related to better socioemotional health. This study advances research and theory on biological correlates implicated in the development of children's self-regulation and furthers our understanding of factors that may support children's developing self-regulation at the physiological level.

Fathering across contexts: The moderating role of respiratory sinus arrhythmia in predicting toddler emotion regulation

Caregivers play an integral role in promoting children's emotion regulation, while children's individual physiology affects how they respond to the caregiving environment. Relatively little is known about how fathering influences toddler emotion regulation, particularly within African American and low-income communities, where risk related to the development of emotion regulation is higher. This study investigated relations among fathering, toddler parasympathetic regulation, and toddler emotion regulation in a sample of 92 families. Fathering was assessed during two interactions: engagement following a stressor during a triadic task and a dyadic play task. Respiratory sinus arrhythmia (resting and reactivity) was obtained as an index of toddler parasympathetic arousal. Findings demonstrated an association between fathers' engagement poststressor and toddler emotion regulation. Toddler RSA moderated this association: toddlers with elevated levels of resting RSA benefitted from parenting engagement following a stressor. Fathering during play did not relate to toddler emotion regulation. The importance of fathering and physiologic contexts in early regulatory development is discussed.

Heart rate increase predicts challenging behavior episodes in preschoolers with autism

Identifying triggers for challenging behavior is difficult in some children with autism because of their limited communication abilities. Physiological indicators of stress may provide important insights. This study examined whether heart rate (HR) predicts challenging behavior in children with autism. While wearing an electrocardiograph monitor, 41 children with autism aged 2- to 4-years participated in tasks designed to induce low-level stress (e.g. waiting for a snack). Coders identified 106 time periods during which challenging behaviors occurred and also coded 106 randomly selected time samples that did not include challenging behaviors. Thirteen (32%) participants exhibited challenging behaviors and were included in the study. Baseline-corrected HR was computed for each behavior/time sample. On average, children with autism showed a 22 ± 16% HR increase from baseline 58 ± 22 seconds before the onset of a challenging behavior episode. Peak HR change had moderate predictive utility (area under the curve = .72, p < .001). The increase in HR before challenging behaviors was similar for children of different characteristics (age, autism severity, expressive language ability, overall developmental ability). Results highlight the promise of using physiological stress to predict challenging behavior in preschoolers with autism; although, they need to be replicated in larger samples. Given recent advances in wearable biosensing, it may be useful to incorporate HR monitoring in autism intervention. Lay summary In children with autism, changes in heart rate (HR) may help us predict when challenging behavior is about to occur - but this hypothesis has not been well studied. In this study, HR increase moderately predicted challenging behavior in preschoolers with autism. Given recent advances in wearable sensors, it may be useful to incorporate HR monitoring in autism intervention.