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Related Experiment Video

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Control of Eating Behavior Using a Novel Feedback System
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Does measuring body weight impact subsequent response to eating behavior questions?

Carly R Pacanowski1, Jeffery Sobal, David A Levitsky

  • 1a Division of Nutritional Sciences, Cornell University , Ithaca , New York.

Journal of the American College of Nutrition
|March 10, 2015
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Summary

Being weighed before completing eating behavior questionnaires may highlight differences in dietary restraint, but doesn't significantly alter overall scores. Researchers should carefully consider how they analyze restraint data.

Keywords:
Three-Factor Eating Questionnairebody weightdisinhibitionprimingrestraint

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Area of Science:

  • Psychology
  • Behavioral Science
  • Nutrition Science

Background:

  • The order of weighing and questionnaire completion can influence perceptions of eating behavior.
  • Understanding this impact is crucial for accurate research and clinical practice.

Purpose of the Study:

  • To investigate if being weighed immediately before completing the Three Factor Eating Questionnaire (TFEQ) affects eating behavior responses.
  • To test the hypothesis that weighing primes participants, increasing measures of dietary restraint, disinhibition, and hunger.

Main Methods:

  • A quasi-experimental design involved 355 volunteers across 8 US locations.
  • Participants were randomly assigned to be weighed either before or after completing the TFEQ.

Main Results:

  • Hypotheses were not fully supported, though known relationships between weight, restraint, and disinhibition were replicated.
  • Weighing first showed a significant difference in disinhibition scores between low and high restraint groups (p = 0.003).
  • This effect was not significant when restraint was treated as a continuous variable, raising questions about dichotomization.

Conclusions:

  • Weighing may not be a strong enough prime to universally alter eating behavior questionnaire scores.
  • However, it might reveal differences in dietary restraint status more clearly.
  • Researchers should be cautious about dichotomizing restraint scores, as it can lead to different interpretations compared to continuous analysis.