Personality pathology and daily aspects of marital functioning.

Personality disorders (PDs) are associated with a host of interpersonal problems, including unstable and dysfunctional romantic relationships. In previous research, PD symptoms have been linked to one's own and spouse's self-reported level of marital satisfaction and marital conflict. The current study extends on this work by examining whether Diagnostic and Statistical Manual of Mental Disorders (DSM) PD criteria would predict aspects of daily marital functioning. A total of 99 newlywed couples (N = 198) recruited from the community were assessed for PD symptoms using a self-report measure and subsequently completed a 6-day diary protocol. Multilevel modeling was used to examine the association of PD symptoms with three major aspects of daily functioning: overall relationship sentiment, serious conflicts with one's spouse, and quality of interactions. Results indicated that PD symptoms significantly predicted aspects of all three measures of daily functioning. The individual PDs generally showed the greatest associations with aspects of conflict. Paranoid, schizoid, avoidant, and obsessive-compulsive PD scores were significantly negatively related to overall relationship sentiment whereas Cluster A and Cluster C PD scores negatively predicted various daily interaction behaviors. Findings provide insight into the mechanisms that might explain the associations between PD symptoms and overall measures of relationship functioning.