Why the study?
Few studies have examined the extent to which relations between respiratory sinus arrhythmia and temperament characteristics vary across ethnicity in childhood.
Baseline respiratory sinus arrhythmia is positively associated with the Affect-Extraversion dimension of temperament in European American but not Chinese-American preschool children.
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Ethnic variation in RSA-temperament links warrants caution generalizing across groups; leaves open RSA as a universal emotional marker in children.
Respiratory sinus arrhythmia (RSA) has been extensively investigated as a marker of adaptive emotional functioning in both children and adults, with studies linking RSA to temperamental dimensions such as positive affect and extraversion. However, few studies have examined the extent to which relations between RSA and temperament characteristics vary across ethnicity in childhood. We examined relations between respiratory sinus arrhythmia (RSA) and temperament dimensions (Activity Level, Task Orientation, and Affect-Extraversion) and the moderating role of ethnicity among preschoolers. Chinese- American (n = 28, Mage = 54.30 months) and European American (n = 32, Mage = 50.41 months) preschoolers were assessed for their temperament and RSA. Findings indicated higher levels of Affect-Extraversion among European American children. Ethnicity moderated the association between the baseline RSA and the Affect-Extraversion dimension of temperament, with a significant positive association found only for European American children. More research is needed to examine the effects of social-cultural experiences on the relation between children’s affective regulation and autonomic functioning development.
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Lee et al. (2020) studied this question.
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