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A systematic review and meta-analysis of set-shifting ability in eating disorders

  • MARION E. ROBERTS (a1), KATE TCHANTURIA (a2), DANIEL STAHL (a3), LAURA SOUTHGATE (a1) and JANET TREASURE (a1)...
ABSTRACT</title><sec id='sec_a001'><title>Background</title><p>The aim was to critically appraise and synthesize the literature relating to set-shifting ability in eating disorders. PsycINFO, Medline, and Web of Science databases were searched to December 2005. Hand searching of eating-disorder journals and relevant reference sections was also undertaken.</p></sec><sec id='sec_a002'><title>Method</title><p>The 15 selected studies contained both eating disorder and healthy control groups, and employed at least one of the following six neuropsychological measures of set-shifting ability; Trail Making Test (TMT), Wisconsin Card Sort Test (WCST), Brixton task, Haptic Illusion, CatBat task, or the set-shifting subset of the Cambridge Neuropsychological Test Automated Battery (CANTAB). The outcome variable was performance on the set-shifting aspect of the task. Pooled standardized mean differences (effect sizes) were calculated.</p></sec><sec secType='results' id='sec_a003'><title>Results</title><p>TMT, WCST, CatBat and Haptic tasks had sufficient sample sizes for meta-analysis. These four tasks yielded acceptable pooled standardized effect sizes (0·36; TMT −1·05; Haptic) with moderate variation within studies (as measured by confidence intervals). The Brixton task showed a small pooled mean difference, and displayed more variation between sample results. The effect size for CANTAB set shifting was 0·17.</p></sec><sec secType='conclusion' id='sec_a004'><title>Conclusion
ABSTRACTBackground

The aim was to critically appraise and synthesize the literature relating to set-shifting ability in eating disorders. PsycINFO, Medline, and Web of Science databases were searched to December 2005. Hand searching of eating-disorder journals and relevant reference sections was also undertaken.

Method

The 15 selected studies contained both eating disorder and healthy control groups, and employed at least one of the following six neuropsychological measures of set-shifting ability; Trail Making Test (TMT), Wisconsin Card Sort Test (WCST), Brixton task, Haptic Illusion, CatBat task, or the set-shifting subset of the Cambridge Neuropsychological Test Automated Battery (CANTAB). The outcome variable was performance on the set-shifting aspect of the task. Pooled standardized mean differences (effect sizes) were calculated.

Results

TMT, WCST, CatBat and Haptic tasks had sufficient sample sizes for meta-analysis. These four tasks yielded acceptable pooled standardized effect sizes (0·36; TMT −1·05; Haptic) with moderate variation within studies (as measured by confidence intervals). The Brixton task showed a small pooled mean difference, and displayed more variation between sample results. The effect size for CANTAB set shifting was 0·17.

Conclusion

Problems in set shifting as measured by a variety of neuropsychological tasks are present in people with eating disorders.

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Corresponding author
*Address for correspondence: Marion E. Roberts, Division of Psychological Medicine, Eating Disorders Research Unit, Department of Academic Psychiatry, King's College, 5th Floor Thomas Guy House, Guy's Hospital, London SE1 9RT, UK. (Email: marion.roberts@iop.kcl.ac.uk)
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M. Egger , G. D. Smith , M. Schneider & C. Minder (1997). Bias in meta analysis detected by a simple, graphical test. British Medical Journal 315, 629634.

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Psychological Medicine
  • ISSN: 0033-2917
  • EISSN: 1469-8978
  • URL: /core/journals/psychological-medicine
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