Differential impairments underlying decision making in anorexia nervosa and bulimia nervosa: A cognitive modeling analysis
Article first published online: 18 NOV 2013
Copyright © 2013 Wiley Periodicals, Inc.
International Journal of Eating Disorders
Volume 47, Issue 2, pages 157–167, March 2014
How to Cite
Chan, T. W. S., Ahn, W.-Y., Bates, J. E., Busemeyer, J. R., Guillaume, S., Redgrave, G. W., Danner, U. N. and Courtet, P. (2014), Differential impairments underlying decision making in anorexia nervosa and bulimia nervosa: A cognitive modeling analysis. Int. J. Eat. Disord., 47: 157–167. doi: 10.1002/eat.22223
- Issue published online: 3 FEB 2014
- Article first published online: 18 NOV 2013
- Manuscript Accepted: 6 OCT 2013
- Manuscript Revised: 4 OCT 2013
- Manuscript Received: 3 APR 2013
- CHU Montpellier. Grant Numbers: AOI UF 8854, 7880
- anorexia nervosa;
- bulimia nervosa;
- decision making;
- cognitive modeling;
- reward processing;
- reward sensitivity;
- punishment sensitivity;
- memory deficits
This study examined the underlying processes of decision-making impairments in individuals with anorexia nervosa (AN) and bulimia nervosa (BN). We deconstructed their performance on the widely used decision task, the Iowa Gambling Task (IGT) into cognitive, motivational, and response processes using cognitive modeling analysis. We hypothesized that IGT performance would be characterized by impaired memory functions and heightened punishment sensitivity in AN, and by elevated sensitivity to reward as opposed to punishment in BN.
We analyzed trial-by-trial data of IGT obtained from 224 individuals: 94 individuals with AN, 63 with BN, and 67 healthy comparison individuals (HC). The prospect valence learning model was used to assess cognitive, motivational, and response processes underlying IGT performance.
Individuals with AN showed marginally impaired IGT performance compared to HC. Their performance was characterized by impairments in memory functions. Individuals with BN showed significantly impaired IGT performance compared to HC. They showed greater relative sensitivity to gains as opposed to losses than HC. Memory functions in AN were positively correlated with body mass index.
This study identified differential impairments underlying IGT performance in AN and BN. Findings suggest that impaired decision making in AN might involve impaired memory functions. Impaired decision making in BN might involve altered reward and punishment sensitivity. © 2013 Wiley Periodicals, Inc. (Int J Eat Disord 2014; 47:157–167)