The Importance of a Few Good Friends: Perceived Network Support Moderates the Association Between Daily Marital Conflict and Diurnal Cortisol

This study examined whether the extent to which spouses feel they have available and satisfying support outside their marriage buffers spouses from the potential negative physiological effects of conflict inside their marriage. Newlywed couples (N = 214 spouses) reported occurrences of marital conflict in a daily diary and concurrently provided morning and evening saliva samples for the calculation of daily diurnal cortisol slopes. Extending prior work demonstrating links between marital conflict and acute cortisol responses in laboratory settings, results revealed that spouses exhibited flatter (i.e., less healthy) diurnal cortisol slopes on days of greater marital conflict. Although the quantity of spouses' support network connections was not associated with physiological responses to conflict, the quality of perceived network support attenuated the association between daily marital conflict and diurnal cortisol slopes. Thus, maintaining a satisfying network of social connections outside a marriage may protect spouses' well-being during periods of marital difficulty.