Increased capacity to delay reward in anorexia nervosa

Joanna E. Steinglass, Bernd Figner, Staci Berkowitz, H. Blair Simpson, Elke U. Weber, B. Timothy Walsh

Research output: Contribution to journalArticle

87 Scopus citations

Abstract

Individuals with anorexia nervosa (AN) are often characterized as possessing excessive self-control and are unusual in their ability to reduce or avoid the consumption of palatable foods. This behavior promotes potentially life-threatening weight loss and suggests disturbances in reward processing. We studied whether individuals with AN showed evidence of increased self-control by examining the tendency to delay receipt of a monetary, non-food related, reward. Underweight AN (n = 36) and healthy controls (HC, n = 28) completed a monetary intertemporal choice task measuring delay discounting factor. Individuals with AN reduced the value of a monetary reward over time significantly less than HC (F[1,61] = 5.03; p = 0.029). Secondary analyses indicated that the restricting subtype of AN, in particular, showed significantly less discounting than HC (F[1,46] = 8.3; p = 0.006). These findings indicate that some individuals with AN show less temporal discounting than HC, suggestive of enhanced self-control that is not limited to food consumption. This is in contrast to other psychiatric disorders, for example, substance abuse, which are characterized by greater discounting. Though preliminary, these findings suggest that excessive self-control may contribute to pathological processes and individuals with AN may have neuropsychological characteristics that enhance their ability to delay reward and thereby may help to maintain persistent food restriction.

Original languageEnglish (US)
Pages (from-to)773-780
Number of pages8
JournalJournal of the International Neuropsychological Society
Volume18
Issue number4
DOIs
StatePublished - Jul 2012

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Clinical Psychology
  • Clinical Neurology
  • Psychiatry and Mental health

Keywords

  • Delay discounting
  • Eating disorders
  • Neuroeconomics
  • Neuropsychology
  • Self-control
  • Temporal discounting

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