On Measuring and Modeling Physiological Synchrony in Dyads.

Physiological synchrony within a dyad, or the degree of temporal correspondence between two individuals' physiological systems, has become a focal area of psychological research. Multiple methods have been used for measuring and modeling physiological synchrony. Each method extracts and analyzes different types of physiological synchrony, where 'type' refers to a specific manner through which two different physiological signals may correlate. Yet, to our knowledge, there is no documentation of the different methods, how each method corresponds to a specific type of synchrony, and the statistical assumptions embedded within each method. Hence, this article outlines several approaches for measuring and modeling physiological synchrony, connects each type of synchrony to a specific method, and identifies the assumptions that need to be satisfied for each method to appropriately extract each type of synchrony. Furthermore, this article demonstrates how to test for between-dyad differences of synchrony via inclusion of dyad-level (i.e., time-invariant) covariates. Finally, we complement each method with an empirical demonstration, as well as online supplemental material that contains Mplus code.

The development of frustration regulation over early childhood: Links between attention diversion and parasympathetic activity.

Diverting attention away from negative emotional stimuli has been associated with calmer physiological states in the moment, but little is known about the potential long-term effects of this emotion regulation strategy on physiology. Similarly, how physiological states, in turn, may contribute to the development of regulatory behaviors has seldom been examined. The current study investigated the concurrent and prospective associations between children's parasympathetic activity and attention diversion during a frustrating experience over 2.5 years. At 3.5 (n = 83) and 6 years (n = 58), children participated in age-appropriate frustration inductions. Multiphase latent growth curve models were used to model dynamic changes in respiratory sinus arrhythmia (RSA) reactivity to and recovery from frustration. At 6 years, attention diversion was associated with concurrent increases in RSA (increased parasympathetic influence). However, longitudinal path models showed the opposite association. Attention diversion at 3.5 years predicted heightened autonomic arousal at 6 years in the form of greater decreases in RSA throughout the reactivity phase. Additionally, RSA recovery at 3.5 years predicted less use of attention diversion at 6 years. These findings suggest a developmental process by which earlier emotion regulation behaviors shape later physiological responses, with different short- versus long-term correlates of attention diversion. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

The Development of Generosity From 4 to 6 Years: Examining Stability and the Biopsychosocial Contributions of Children's Vagal Flexibility and Mothers' Compassion.

Individual differences in children's prosocial behaviors, including their willingness to give up something of value for the benefit of others, are rooted in physiological and environmental processes. In a sample of 4-year-old children, we previously found evidence that flexible changes in respiratory sinus arrhythmia (RSA) were linked to donation behavior, and that these physiological patterns may support greater sensitivity to the positive effects of compassionate parenting on donation behavior. The current study focused on a follow-up assessment of these children at age 6. First, we examined the stability of individual differences in donation behavior and related parasympathetic nervous system (PNS) activity from age 4 to 6. Second, we examined associations between donation behavior and RSA at 6 years. Third, we examined whether the association between children's RSA and donation behavior at age 6 varied depending on mothers' compassionate love. We found low to modest stability in donation behavior and RSA reactivity from age 4 to 6. These findings provide preliminary evidence that stable individual differences in altruism, as reflected by generosity, and in some aspects of parasympathetic functioning during opportunities to be prosocial, emerge in childhood. In addition, we found that some of the same associations between donation behavior, RSA, and compassionate love that we previously observed in children at 4 years of age continued to be evident 2 years later at age 6. Greater decreases in RSA when given the opportunity to donate were associated with children donating more of their own resources which, in turn, were associated with greater RSA recovery after the task. Lastly, mothers' compassionate love was positively associated with donation behavior in children who demonstrated stronger decreases in RSA during the task; compassionate parenting and RSA reactivity may serve as external and internal supports for prosociality that build on each other. Taken together, these findings contribute to the perspectives that individual differences in altruistic behaviors are intrinsically linked to healthy vagal flexibility, and that biopsychosocial approaches provide a useful framework for examining and understanding the environmental and physiological processes underlying these individual differences.

Perceived peer support and diabetes management from adolescence into early emerging adulthood.

OBJECTIVES: The objective of the study was to examine longitudinal associations of perceived diabetes-specific peer support with adherence and glycemic control among late adolescents with type 1 diabetes as they transition out of high school and into early emerging adulthood. METHOD: As part of a larger study, 211 high school seniors with type 1 diabetes completed confidential online surveys and were reassessed 1 year later. Perceived diabetes-specific peer support and adherence were assessed in each survey. Glycemic control was measured with HbA1c assay kits. RESULTS: Perceived diabetes-specific peer support in high school predicted better adherence across the subsequent year while controlling for initial levels of adherence. Perceived peer support during early emerging adulthood was also associated with better adherence across time, after controlling for initial levels of both adherence and peer support. CONCLUSIONS: Perceived diabetes-specific peer support may be a protective factor as late adolescents with type 1 diabetes transition out of high school. Building strong peer support during the transition into early emerging adulthood may facilitate better diabetes management during this high-risk time of development. (PsycINFO Database Record (c) 2018 APA, all rights reserved).