Effects of Couple Drinking Events on Short-Term Relationship Harmony and Discord: An Ecological Momentary Assessment Study

Objective: Couples with concordant drinking patterns have higher relationship satisfaction and greater relationship stability over time. Emerging evidence suggests that episodes of drinking with one's intimate partner can have positive immediate consequences for relationship functioning, whereas drinking episodes without partner do not. The present ecological momentary assessment (EMA) study examined the impact of drinking with partner (DWP) and drinking without partner (DWOP) events on immediate and next-day self-reported relationship harmony and discord. Method: Heterosexual, cohabiting community couples with congruent drinking patterns, ages 21-35 (N = 191), made three random reports each day for 30 days. Multilevel modeling was used to examine the impact of DWP and DWOP events on momentary relationship functioning, controlling for quantity of alcohol consumed and for functioning at the previous report. Results: As hypothesized, harmony increased immediately after DWP (but not after DWOP) compared with no drinking for men and women. There were no immediate effects of drinking on discord. There were also positive effects of DWP on next morning harmony, but these were specific to women's drinking reports. Women's DWP and DWOP predicted reduced next morning discord for men; however, men's and women's discord increased as women consumed more drinks the previous evening. Conclusions: Findings suggest that concordant drinking couples may achieve immediate benefits for couple harmony from drinking together. Women's drinking seems to be more impactful than men's on next-day harmony and discord, with greater harmony following women's evening DWP but increased discord associated with heavier evening drinking by women. Public Health Significance Statement Within cohabiting heterosexual couples, episodes of drinking alcohol together resulted in increases in perceived relationship harmony, suggesting that drinking may be reinforcing. However, heavier consumption, particularly by female partners, led to increased relationship discord the next day.