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Anorexia nervosa is a complex and severe eating disorder characterized by an intense fear of weight gain, an unrelenting pursuit of thinness, and a distorted body image. It often leads to dangerously low body weight relative to an individual's age and height. This disorder is marked by significant physical and psychological consequences, making it one of the most life-threatening psychiatric illnesses.
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Related Experiment Video

Updated: Nov 11, 2025

Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa
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A Reference-Dependent Computational Model of Anorexia Nervosa.

Francesco Rigoli1, Cristina Martinelli2

  • 1Department of Psychology, City, University of London, Northampton Square, London, EC1V 0HB, UK. francesco.rigoli@city.ac.uk.

Cognitive, Affective & Behavioral Neuroscience
|March 22, 2021
PubMed
Summary
This summary is machine-generated.

A new computational model explains anorexia nervosa by proposing that a high reference point influences perfectionism and low self-esteem. This model clarifies key anorexia constructs and suggests reference effects drive extreme weight pursuit.

Keywords:
AnorexiaControlDichotomous thinkingEvaluationPerfectionismReference dependent

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Area of Science:

  • Psychiatry
  • Computational Neuroscience
  • Cognitive Psychology

Background:

  • Anorexia nervosa is often linked to perfectionism, dichotomous thinking, and poor control, leading to low self-esteem.
  • Restraining eating may be an attempt to regain control and self-esteem in individuals with anorexia nervosa.
  • Existing theories lack precise specification of constructs like perfectionism and control.

Purpose of the Study:

  • To propose a computational model of anorexia nervosa to clarify key theoretical constructs.
  • To integrate reference-dependent evaluation theories into understanding anorexia nervosa.
  • To offer a framework for novel empirical predictions and interdisciplinary research.

Main Methods:

  • Developed a computational model based on reference-dependent evaluation theories.
  • Modeled how a high reference point can explain general characteristics of anorexia nervosa.
  • Hypothesized how domain-specific control (body shape vs. other domains) influences anorexia development.

Main Results:

  • The model suggests a high reference point underlies perfectionism, dichotomous thinking, low self-esteem, and low sense of control.
  • Anorexia nervosa may develop when body shape control is prioritized over other life domains.
  • Reference effects might explain the pursuit of extremely low body weight and body misperceptions.

Conclusions:

  • The computational model clarifies core concepts in anorexia nervosa research.
  • It provides a framework for integrating psychological and neuroscientific perspectives.
  • The model facilitates theoretical debate and empirical investigation into anorexia nervosa.