LAUSR

High positive affect and low negative affect have been repeatedly tied to better individual and interpersonal well-being. However, research has focused on mean levels whereas the day-to-day unfolding of affect and its impact on romantic relationships remain largely understudied. Here, we examined the links between mean levels and variability in affect and changes in perceptions of partner regard —the extent to which people believe that their partners value and accept them. One hundred twenty-five African American couples (N = 250 individuals) reported how positively they thought their partners viewed them across two sessions (T1 and T2), separated by a 3-week daily diary study in which participants reported on their positive and negative affect each day for 21 consecutive days. Using dyadic analysis, we found that higher actor negative affect variability was associated with lower perceived regard at T2 controlling for perceived regard at T1. This finding held when controlling for mean levels of actor and partner negative affect. By contrast, PA variability was curvilinearly associated with perceived regard, with moderate levels of variability associated with higher subsequent perceived regard. These results highlight the importance of accounting for mean levels and curvilinear effects when examining links between affect dynamics and relational well-being.