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The Intuitive Eating Scale-2: Re-evaluating its Factor Structure using a Bifactor Exploratory Structural Equation Modelling Framework

journal contribution
posted on 2023-08-30, 18:42 authored by Viren Swami, Christophe Maïano, Adrian Furnham, Charlotte Robinson
Purpose- Previous studies examining the appropriateness of the 4-factor model of intuitive eating scale-2 (IES-2) scores have returned equivocal results, which may reflect methodological limitations in the way IES-2 scores are modelled. Here, we applied a bifactor-exploratory structural equation modelling (B-ESEM) framework to better understand IES-2 multidimensionality. Methods- A total of 603 participants from the United States completed the IES-2, alongside measures of body appreciation, body acceptance from others, and self-esteem. Our analyses compared the fit of various hypothesised models of IES-2 scores. Results- Models of IES-2 scores based on confirmatory factor analysis (CFA) uniformly showed poor fit. ESEM models showed superior fit to CFA representations and a B-ESEM model showed improved fit over higher-order CFA and B-CFA representations of IES-2 scores. The optimal model was a B-ESEM model that accounted for, through correlated uniqueness (CU), the methodological artefact introduced by negatively-worded IES-2 items. This B-ESEM-CU model was fully invariant across gender and showed adequate construct validity. Conclusion- The B-ESEM-CU framework appears well-suited to understand the multidimensionality of IES-2 scores. A model of IES-2 scores that yields a reliable latent indicator of global intuitive eating while allowing for simultaneous consideration of additional specific factors will likely provide more accurate accounting of the nature and outcomes of intuitive eating. Level of evidence- Level III, cohort study.

History

Refereed

  • Yes

Volume

27

Page range

1349-1357

Publication title

Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity

ISSN

1590-1262

Publisher

Springer

File version

  • Accepted version

Language

  • eng

Legacy posted date

2021-07-19

Legacy creation date

2021-07-19

Legacy Faculty/School/Department

Faculty of Science & Engineering

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