Clients’ and therapists’ parasympathetic interpersonal and intrapersonal regulation dynamics during psychotherapy for depression

The literature on affective regulation in psychotherapy has traditionally relied on explicit client self-report measures. However, both clients' and therapists' affect fluctuate moment-to-moment during a session, highlighting the need for more implicit and continuous indices to better understand these dynamics. This study examined parasympathetic interpersonal and intrapersonal regulation dynamics between therapists and clients with Major Depressive Disorder during Supportive-Expressive Therapy.