Judgments of body weight based on food intake: a pervasive cognitive bias among restrained eaters

Int J Eat Disord. 2008 Jan;41(1):64-71. doi: 10.1002/eat.20440.

Abstract

Objective: Two studies examined the influence of meal-size information on restrained and unrestrained eaters' judgments of body weight and size.

Method: In Study 1, restrained and unrestrained eaters made body-weight and body-size judgments of a woman who had eaten either a small meal or a large meal. In Study 2, participants watched a video of a woman eating a small or large meal, and selected from two photographs of women's bodies (a heavier one and a thinner one), the woman whom they had seen in the video.

Results: Restrained eaters were influenced by meal-size information, judging women who had eaten a smaller meal as being thinner and weighing less (Study 1), and also choosing the thinner body to represent the woman who had eaten a smaller meal (Study 2). Unrestrained eaters were not influenced by food-intake information.

Conclusion: Restrained eaters' (but not unrestrained eaters') judgments of others appear to be biased by meal-size information, suggesting that restrained eaters' food- and weight-related cognitive biases might be more pervasive than has previously been assumed.

MeSH terms

  • Adolescent
  • Adult
  • Bias
  • Body Weight*
  • Cognition / physiology*
  • Energy Intake*
  • Female
  • Humans
  • Judgment*
  • Male
  • Middle Aged
  • Obesity / diet therapy*