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Control of Eating Behavior Using a Novel Feedback System
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Self-referential processing in anorexia nervosa.

Serena J Gu1, Ivieosa Aimufua1, David Pagliaccio1,2

  • 1New York State Psychiatric Institute, New York, New York, USA.

The International Journal of Eating Disorders
|March 4, 2024
PubMed
Summary
This summary is machine-generated.

Individuals with anorexia nervosa (AN) exhibit more negative self-evaluation than healthy controls, as shown by a neurocognitive task. This suggests targeting negative self-evaluation may be beneficial for AN treatment.

Keywords:
anorexia nervosadrift‐diffusion modeleating disorderprocessing biasself‐esteemself‐evaluationself‐referential encoding taskself‐referential processing

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Psychology

Background:

  • Anorexia nervosa (AN) is a severe psychiatric disorder with significant comorbidities.
  • Theoretical models and self-report studies link negative self-evaluation (low self-esteem) to AN development and maintenance.

Purpose of the Study:

  • To investigate self-evaluation in AN using a neurocognitive task, extending previous self-report findings.
  • To implicitly and explicitly probe self-evaluation biases in individuals with AN.

Main Methods:

  • Compared female patients with AN (n=35) and healthy controls (HC, n=38).
  • Utilized explicit (word endorsement) and implicit (recall, reaction time) measures of self-evaluation.
  • Applied a drift-diffusion model to analyze decision-making processes for self-relevant words.

Main Results:

  • Significant group differences observed in explicit and implicit self-evaluation measures (p ≤ .01).
  • The AN group endorsed, recalled, and recognized more negative words than positive words compared to HC.
  • AN group showed more negative valence, bias scores, and slower reaction times for negative words, indicating negative self-evaluation.

Conclusions:

  • Neurocognitive assessment reveals heightened negative self-evaluation in AN patients.
  • Findings suggest negative self-evaluation is a key cognitive feature in anorexia nervosa.
  • Further research is needed to establish causality due to the cross-sectional design.