Reviews and meta-analyses consistently show that couple interventions have significant and large effects compared to no treatment. However, few couples seek premarital counseling and only one third of couples seek marital therapy before getting divorced. Additionally, we know very little about how interventions work, factors that predict their efficacy, or the effectiveness of interventions in the “real world”. My program of research seeks to further our understanding of research-based couple interventions and apply these findings to intervene with couples in more flexible ways.