Regular Article

Ecological momentary assessment of affect, stress, and binge-purge behaviors: Day of week and time of day effects in the natural environment

  1. Joshua M. Smyth PhD1,*,
  2. Stephen A. Wonderlich PhD2,3,
  3. Martin J. Sliwinski PhD1,
  4. Ross D. Crosby PhD2,3,
  5. Scott G. Engel PhD2,
  6. James E. Mitchell MD2,3,
  7. Rachel M. Calogero PhD1

Article first published online: 29 DEC 2008

DOI: 10.1002/eat.20623

Issue

International Journal of Eating Disorders

International Journal of Eating Disorders

Volume 42, Issue 5, pages 429–436, July 2009

Additional Information

How to Cite

Smyth, J. M., Wonderlich, S. A., Sliwinski, M. J., Crosby, R. D., Engel, S. G., Mitchell, J. E. and Calogero, R. M. (2009), Ecological momentary assessment of affect, stress, and binge-purge behaviors: Day of week and time of day effects in the natural environment. Int. J. Eat. Disord., 42: 429–436. doi: 10.1002/eat.20623

Author Information

  1. 1

    Department of Psychology, Syracuse University, Syracuse, New York

  2. 2

    Department of Clinical Research, Neuropsychiatric Research Institute, Fargo, North Dakota

  3. 3

    Department of Clinical Neuroscience, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota

*Department of Psychology, Syracuse University, Syracuse, New York

Publication History

  1. Issue published online: 9 JUN 2009
  2. Article first published online: 29 DEC 2008
  3. Manuscript Accepted: 28 SEP 2008

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Keywords:

  • EMA;
  • bulimia nervosa;
  • diurnal cycle;
  • time of day;
  • day of week

Abstract

Objective

The present study examined ecological momentary assessments of binge/vomit behavior, mood, and type and severity of stressors in a sample of 133 women with bulimia nervosa.

Method

Participants completed an ecological momentary assessment protocol for a period of 2 weeks.

Results

Mixed-effects and multilevel logistic models revealed significant variation across time of day and day of the week in the occurrence of binging, vomiting, positive and negative affect, and the severity and types of stressful events.

Discussion

These findings explicate how momentary and daily experiences vary in the natural environments of women with bulimia nervosa, and document critical time periods for intervention. © 2008 by Wiley Periodicals, Inc. Int J Eat Disord, 2009

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