Physiological research in couple and family therapy

Integrating physiological measures into couple and family therapy (CFT) research provides valuable insights into relational dynamics that traditional psychological methods may miss. This chapter reviews various physiological systems and indices used in CFT research, focusing on endocrine system regulation (e.g., cortisol, oxytocin, testosterone), autonomic nervous system functioning (measured by cardiac and skin conductance responses), and brain activity (measured by fMRI and EEG). These physiological markers offer a window into the intricate interplay between psychological and physiological processes that influence relationships. Despite the promise of these physiological measures, challenges remain, particularly regarding specificity, timing, and contextual factors that can influence physiological responses. Data collection considerations, including the timing of measures and the synchronicity of multiple data sources, are critical for valid results. There are also ethical considerations unique to these methods. The chapter offers guidance for researchers and clinicians seeking to incorporate physiological data into their work, enhancing both theoretical and practical applications of CFT.