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Does weight stigma reduce working memory? Evidence of stereotype threat susceptibility in adults with obesity.

BACKGROUND: Obesity is a highly stigmatizing condition, and reduced cognitive functioning is a stereotypical trait ascribed to individuals with obesity. In the present work, we tested the hypothesis that stereotype threat (i.e., a depletion of working memory resources due to the fear of confirming a negative self-relevant stereotype when a stereotype-related ability is assessed) contributes to cognitive deficits in individuals with obesity.

METHODS: Computerized tests of (a) working memory and (b) probabilistic learning-an ability unrelated with working memory-were administered to a community sample of 131 adults. Stereotype threat was manipulated by altering the alleged nature of the tasks; the tasks were alternatively labeled as intelligence tests (high stereotype threat condition), memory and learning tests (standard instructions condition), or distraction games (low stereotype threat condition).

RESULTS: A negative relation between body mass index (BMI) and working memory emerged in both the high stereotype threat (95% CIs = -0.872, -0.175, p = 0.003) and the standard instructions conditions (95% CIs = -0.974, -0.153, p = 0.007), but not in the low stereotype threat condition (95% CIs = -0.266, 0.430, p = 0.643). No effect emerged on probabilistic learning.

CONCLUSION: Stereotype threat is associated with impaired working memory of individuals with obesity. Implications for researchers and clinicians are discussed.

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