Physiological regulation processes differentiate the experience of ruptures between patient and therapist.

The empirical and clinical literature emphasizes the importance of alliance ruptures, signaling therapeutic processes occurring within and between the partners of the therapeutic dyad. However, knowledge about the underlying regulatory processes that occur amid ruptures is scarce. Identifying the underlying physiological markers may shed light on these regulatory processes. The overarching goal of the present study was to explore physiological markers of withdrawal and confrontation ruptures, within the patient and the therapist. Given the little known on the subject, we used a single-case design (94 episodic segments) to explore biologically based regulatory processes in the face of a rupture, contrasting confrontation ruptures versus withdrawal ruptures versus control episodes (emotional and neutral episodes). Findings showed that the patient and the therapist had contrasting physiological responses to the ruptures, depending on the type. During withdrawal ruptures, the patient exhibited high regulation, while the therapist did not show a clear physiological reaction. During confrontation ruptures, the patient exhibited low regulation, while the therapist exhibited high regulation. The different physiological regulation processes at times of ruptures suggest that, in withdrawal, the patient relied on intrapersonal regulation, contrasting with the interpersonal regulation observed in confrontation ruptures. Findings remained robust after controlling for speech turns and 10,000 Monte Carlo permutations to assess chance-level results. These findings provide initial evidence for the link between arousal and behavior in ruptures, offering valuable psychoeducational material for therapists to improve their handling of these challenging moments. (PsycInfo Database Record (c) 2024 APA, all rights reserved).