| Sumario: | Recent efforts to improve marital therapy interventions have begun investigating psychophysiologic processes in therapy. These studies are novel and represent initial investigations into relevant phenomena associated with the therapy process. Grounded in Polyvagal Theory, this study introduces an on‐going multimethod couple therapy process research (CHAMPS) and highlights the importance of establishing norms among distressed couples in therapy, which can provide context for other studies' results and instigate further investigation of physiology in marital therapy. Using a sample of 24 married, heterosexual couples (N = 48), we examine trends in markers of sympathetic (SNS) and parasympathetic nervous system (PNS) functioning; namely, electrodermal activity (SNS), cardiac impedence (SNS), and respiratory sinus arrhythmia (PNS) before and during therapy sessions and shifts in these measures over the course of four therapy sessions. We discuss clinical implications and provide recommendations for further investigations.
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