Interoceptive accuracy or ‘the objective accuracy with which a patient can report internal sensations’, can be assessed in behavioral tests such as heartbeat detection, and seems to be altered in some psychiatric conditions.
Khoury establishes interoceptive accuracy as an empirically measurable, behaviorally assessed construct distinct from related interoceptive concepts, and documents its alteration across multiple psychiatric diagnoses.
, Interoception in Psychiatric Disorders: A Review of Randomized, Controlled Trials with Interoception-Based Interventions, 2018thesis