Predictors of diet failure: A multifactorial cognitive and behavioural model

J Health Psychol. 2019 Jun;24(7):857-869. doi: 10.1177/1359105316689605. Epub 2017 Jan 22.


Obesity is recognised as a multidetermined issue. However, research aimed at addressing diet failure has typically examined factors in isolation. Furthermore, previous research has included limited input from dieters themselves. A qualitative study identified a number of themes contributing to diet failure. This study aimed to test these themes with a larger sample ( n = 426) while also determining their fit within a multifactorial model. The results of this study supported the conceptualisation of diet failure using a multifactorial model while also illustrating correlational pathways to be more complex than currently understood in the literature.

Keywords: diet failure; dieting; obesity; weight loss; weight management.

MeSH terms

  • Adolescent
  • Adult
  • Cognition*
  • Cross-Sectional Studies
  • Diet, Reducing / psychology*
  • Feeding Behavior / psychology*
  • Female
  • Focus Groups
  • Humans
  • Male
  • Middle Aged
  • Models, Psychological*
  • Obesity / diet therapy*
  • Obesity / psychology
  • Qualitative Research
  • Self Report
  • Treatment Failure
  • Young Adult