A randomized clinical trial compared the effects of traditional behavioral couple therapy (TBCT) and integrative behavioral couple therapy (IBCT) on 134 seriously and chronically distressed married couples, stratified into moderately and severely distressed groups. Couples in IBCT made steady improvements in satisfaction throughout the course of treatment, whereas TBCT couples improved more quickly than IBCT couples early in treatment but then, in contrast to the IBCT group, plateaued later in treatment. Both treatments produced similar levels of clinically significant improvement by the end of treatment (71% of IBCT couples and 59% of TBCT couples were reliably improved or recovered on the Dyadic Adjustment Scale; G. B. Spanier, 1976). Measures of communication also showed improvement for both groups. Measures of individual functioning improved as marital satisfaction improved.