The Evidence Base
Couples therapy has a genuine and growing evidence base. The two most extensively validated approaches are Emotionally Focused Therapy (EFT), developed by Sue Johnson, and the Gottman Method, developed by John and Julie Gottman. A 1999 meta-analysis by Johnson, Hunsley, Greenberg, and Schindler found that EFT produced significant improvement in 70–73% of couples, with an effect size of d=0.84 — large by psychological research standards. Two-year follow-up data showed that gains were maintained and often continued to improve after therapy ended.
The Timing Problem
One of the most consistent findings in couples therapy research is that couples wait far too long to seek help. Gottman's research found that the average couple waits six years after problems become serious before entering therapy. By this point, negative patterns are deeply entrenched, contempt may have developed, and both partners may have emotionally disengaged. Research shows that therapy is significantly more effective when sought early — before the patterns are established and before emotional disengagement has set in.
"The average couple waits 6 years after problems become serious before seeking therapy — by which point negative patterns are deeply entrenched."— Gottman, J.M. (1999). The Marriage Clinic. W.W. Norton.
Emotionally Focused Therapy (EFT)
EFT is grounded in attachment theory and focuses on identifying and restructuring the negative interaction cycles that maintain distress. The core intervention is helping partners identify the attachment fears and needs beneath their surface behaviours — the Seeker's pursuit, the Fortress's withdrawal — and express these vulnerabilities directly rather than through protest or shutdown. Research consistently shows EFT is more effective than cognitive-behavioural approaches for couples with significant attachment insecurity.
When Therapy Doesn't Work
Couples therapy is not universally effective. Research identifies several contraindications: active domestic violence (individual safety must be established first), ongoing affairs that are not disclosed to the therapist, severe individual psychopathology that requires individual treatment first, and situations where one or both partners have already decided to leave the relationship. Therapy is also significantly less effective with therapists who lack specific couples training — general psychotherapy training does not transfer well to the couples context.
Couples therapy has a strong evidence base — EFT produces significant improvement in 70% of couples with an effect size of d=0.84. The biggest problem is timing: couples wait an average of 6 years before seeking help. EFT and the Gottman Method are the most validated approaches. Therapy is less effective with active violence, undisclosed affairs, or untrained therapists.