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. 2018;43(2):152-161.
doi: 10.1080/87565641.2017.1367395. Epub 2018 Feb 7.

Eye Tracking as a Marker of Hyperphagia in Prader-Willi Syndrome

Alexandra P Key  1   2 , Elisabeth M Dykens  1   3
Affiliations

Eye Tracking as a Marker of Hyperphagia in Prader-Willi Syndrome

Alexandra P Key et al. Dev Neuropsychol. 2018.

Abstract

This study examined the feasibility of eye tracking measures as markers of hyperphagia in 42 children and adults with Prader-Willi syndrome (PWS). Gaze data collected during free visual exploration of complex displays revealed that food images may not have an overall superior salience in PWS. However, increased attention to food in the context of other high-interest items was associated with higher scores on caregiver reports of hyperphagia. The study also provided preliminary evidence of test-retest reliability of eye tracking measures, suggesting that gaze characteristics may be a promising objective marker of food-related interests in PWS.

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Figures

Figure 1.
Figure 1.
An example of a stimulus array, with regions of interest for each object marked by rectangles. Circles and connecting lines depict the visual scan path and distribution of fixations for a single subject.
Figure 2.
Figure 2.
The associations between eye tracking measures and hyperphagia severity.
See this image and copyright information in PMC

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