Heart Rate Variability Reactivity Moderates the within-Subject Effects of Capitalization on Daily Positive Mood and Relationship Quality

Capitalization, the process of sharing positive experiences with close others, is associated with increased positive affect. In this daily diary study with 153 participants, heart rate variability reactivity, a biomarker of sensitivity to the social context, moderated the within-subject effects of capitalization on daily positive mood and relationship quality.