Alcohol use among romantic partners is known to be related to a variety of detrimental outcomes, such as decreased relationship satisfaction and increases in conflict. However, discrepant drinking among partners may be a stronger predictor of relationship outcomes over and above the amount of alcohol use. Currently, little is known about potential differences in the within- and between-person effects and discrepancy’s effect on mood, particularly among community samples. The current study investigated the effects of both individual and partner alcohol use, as well as discrepant drinking, on mood and relationship functioning. Data were obtained from 280 heterosexual romantic couples using a measurement burst daily dairy design over the course of one year. Actor Partner Interdependence Model and Dyadic Score Model analyses were used to investigate the effect of alcohol use and discrepant drinking on mood and relationship functioning, both at the within- and between- person levels. Specifically, analyses investigated the effects of no drinking versus moderate drinking, no drinking versus binge drinking, and moderate drinking versus binge drinking. Results revealed that while binge drinking may be related to positive outcomes proximally, the cumulative effects at the between-person level are detrimental. Moreover, discrepant drinking appears most detrimental when women outdrink their partners. These findings have important implications for refining and improving upon couples-based interventions aimed at alcohol-use problems among non-clinical couples.

The goal of this study was to examine the correlation between the brain's preconscious processing of relationship events and direct observation of couples' behavior during a videotaped discussion task. Although we know about the interaction dynamics within romantic relationships that portend conflict and dissatisfaction, very little is known about how individuals read interpersonal events within their relationship. Romantic partners participated in a dyadic EEG (electroencephalogram) lab session in which they played a gambling task. The gambling task consisted of three conditions: 1) individual gambling 2) watching their partners gamble and 3) gambling with advice from their partners. Following the gambling tasks, partners were videotaped discussing relationship topics. Neurocognitive reactions to winning and losing a gamble in response to partner's advice were analyzed as an Evoked Response Potential (ERP). The ERP of interest was the P300, which is associated with the brain making sense of unexpected information. Using an actor partner framework, it was found that the females' P300 predicted observed coercive interaction patterns. This finding suggests that for females with an established coercive relationship with their male partners, positive feedback was unexpected compared to losing.