The Paradox of Interoceptive Experience and the Limits of Privileged Access

The concept of interoception has undergone significant development and has been incorporated into a range of research contexts. Contemporary understandings of interoception transcend narrow neurophysiological frameworks – which traditionally focus on signal processing from internal organs – to encompass higher-order cognitive processes, including the awareness, perception, and interpretation of internal bodily activity. This article situates internal bodily sensations within the context of contemporary philosophical debates on introspection. Because internal bodily experiences entail introspectively accessible mental processes, interoception offers a rich subject for philosophical inquiry. Interoceptive activity is defined not merely by physical processes within the boundaries of the body, but is fundamentally tied to subjective phenomenal experience. It is therefore important to examine introspective access to mental events generated by the internal bodily milieu. While introspection provides a unique, first-person vantage point that grants subjects direct awareness of their own mental states, and has traditionally been viewed as the primary mechanism for apprehending internal bodily changes, this paper challenges the presumed infallibility and privileged nature of introspective access to interoceptively driven states. In several contemporary models of introspection, private internal bodily experience is either overlooked or inadequately theorized. Against this backdrop, the article raises skeptical objections to radical representationalism, demonstrating the untenability of fully extrapolating the argument from diaphanousness, or transparency, to the domain of interoception. Unlike other perceptual modalities, interoception is paradoxical: it exhibits robust phenomenal properties yet lacks clearly identifiable representational content. This leads to the conclusion that internal bodily experience is largely opaque to introspective observation. Ultimately, the author argues for a shift toward a pluralistic model of introspection – one that successfully integrates interoception as a core cognitive mechanism shaping an agent’s self-awareness and emotional experience.

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