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Related Experiment Video

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Using a Virtual Store As a Research Tool to Investigate Consumer In-store Behavior
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Immersive Virtual Reality Dietitian Improves Portion Control Self-Efficacy and Portion Size Estimation Accuracy.

Bianca C Braga1, John Long1, Sara Maksi1

  • 1Department of Nutrition, College of Human Health and Development, The Pennsylvania State University, University Park, PA.

Journal of Nutrition Education and Behavior
|February 28, 2025
PubMed
Summary

Nutrition education delivered via immersive virtual reality (iVR) and in-person methods showed similar effectiveness for improving portion control self-efficacy. The updated iVR application, IVAN 2, demonstrated higher efficacy than IVAN 1.

Keywords:
Nutritioneducationinterventionportion sizevirtual reality

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Area of Science:

  • Nutrition Science
  • Virtual Reality Technology
  • Health Education

Background:

  • Portion control is crucial for managing weight and overall health.
  • Traditional nutrition education methods may have limitations in engagement and accessibility.
  • Immersive virtual reality (iVR) offers a novel platform for delivering educational content.

Purpose of the Study:

  • To compare the efficacy of nutrition education delivered in-person versus through an iVR application (IVAN).
  • To evaluate an updated version of the iVR application (IVAN 2) against the original (IVAN 1).
  • To develop and assess a portion size estimation task within an iVR environment.

Main Methods:

  • Two randomized controlled experiments were conducted with 92 adult participants.
  • Participants were assigned to either in-person nutrition education, IVAN 1, or IVAN 2.
  • Changes in portion control self-efficacy and portion size overestimation were measured.

Main Results:

  • Both in-person and iVR (IVAN 1 and IVAN 2) nutrition education improved portion size self-efficacy.
  • No significant differences in efficacy were found between in-person and iVR delivery in Experiment 1.
  • IVAN 2 showed improved portion size self-efficacy and reduced portion size overestimation compared to IVAN 1 in Experiment 2.

Conclusions:

  • Nutrition education on portion sizes is equally effective when delivered via iVR or in-person.
  • The updated iVR application (IVAN 2) is more effective than the initial version (IVAN 1).
  • iVR-based portion size estimation tasks can be valuable tools for assessing estimation abilities.