Polyvagal Theory, developed by Stephen Porges, provides a neuroscience framework that explains many aspects of rationalization in terms of the nervous system's safety-detection mechanisms.
The Three States of Polyvagal Theory and Rationalization
Ventral vagal (safe and social): Optimal state for connection, learning, and rationalization management
Sympathetic mobilization (fight or flight): Anxiety-type rationalization responses
Dorsal vagal shutdown (freeze/collapse): Depression and dissociation-type rationalization
Neuroception and Rationalization
Neuroception — the body's unconscious safety-detection — can be dysregulated in rationalization, causing false alarms (sensing danger when safe) that drive rationalization responses.
Polyvagal-Informed Rationalization Treatment
Therapy that acknowledges the body's state — helping clients move into ventral vagal 'safe and social' — transforms rationalization management.
Safe relationships, co-regulation, and body-based practices are particularly emphasized.