Antisocial Traits, Negative Emotionality, and Trajectories of Relationship Quality in Mexican-Origin Couples.

The symptoms of antisocial personality disorder (ASPD) and broader personality trait domains such as negative emotionality (NEM) may prove detrimental for marital quality. Previous research with European Americans has found that ASPD negatively predicts couple functioning, even when controlling for NEM. The current study extends previous work by testing whether ASPD (as well as a history of early conduct disorder) and NEM are related to marital quality trajectories in a sample of 450 Mexican-origin couples followed over 9 years. Consistent with other studies, there was a slight average decline in relationship quality over the course of the study along with differences between couples in the initial level of relationship quality and rate of change. Results indicated that NEM was a stronger correlate of initial levels of marital quality than ASPD. Findings underscore the relevance of NEM as a personality trait domain relevant for relationships.