Bodily intolerance of uncertainty influences perceptual recalibration of abdominal boundaries

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Introduction: Perception of our own body can dynamically change based on precision weighting of sensory prediction errors. The current study tested whether a trait-level factor influences such perceptual recalibration. Specifically, we tested whether bodily intolerance of uncertainty (IU), a distress response to ambiguous bodily signals, modulates visuo-somatic recalibration of perceived abdominal boundaries. Methods: Participants competed a virtual reality paradigm, estimating perceived abdominal boundaries along the front-back dimension, before and after either congruent or incongruent visuo-tactile feedback. In the incongruent condition, the visuo-tactile feedback was manipulated to simulate an expanded abdominal boundary. Results: Mixed-effects modelling showed that bodily IU predicted greater shifts in abdominal boundary estimates under incongruent feedback. Discussion: These findings indicate that bodily IU amplifies perceptual change when sensory information is conflicting, suggesting a potential trait-level influence in precision control.

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