Being Hungry Affects Oral Size Perception

I-Perception 9 (3) (2018)

Authors
Parker Crutchfield
Western Michigan University School Of Medicine
Abstract
Oral size perception is not veridical, and there is disagreement on whether this non-veridicality tends to underestimate or overestimate size. Further, being hungry has been shown to affect oral size perception. In the present study, we investigated the effect of hunger on oral size perception. Overall, being hungry had a small but significant effect on oral size perception and seemed to support that oral size perception tends to underestimate the size of objects. Both hungry and sated participants tended to underestimate the size of intraoral objects, but hungry participants underestimated to a significantly lesser degree. Unlike previous research, this tendency was independent of the order and number of assessments of size. We, therefore, offer a novel explanation for these findings: oral size perception is modulated by a hierarchy of Bayesian predictions, and being hungry changes the priors in these predictions.
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