Dimensionality and Psychometric Properties of an Italian Translation of the Intuitive Eating Scale-2 (IES-2): An Assessment using a Bifactor Exploratory Structural Equation Modelling Framework

Swami, Viren and Maïano, Christophe and Todd, Jennifer and Ghisi, Marta and Cardi, Valentina and Bottesi, Gioia and Cerea, Silvia (2021) Dimensionality and Psychometric Properties of an Italian Translation of the Intuitive Eating Scale-2 (IES-2): An Assessment using a Bifactor Exploratory Structural Equation Modelling Framework. Appetite, 166. p. 105588. ISSN 1095-8304

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Official URL: https://doi.org/10.1016/j.appet.2021.105588

Abstract

The construct of intuitive eating is most often measured using the 23-item Intuitive Eating Scale-2 (IES-2), but previous studies have typically relied solely on confirmatory factor analysis (CFA) to understand IES-2 dimensionality. In contrast, a bifactor exploratory structural equation modelling (B-ESEM) framework offers a more realistic account of IES-2 multidimensionality. Here, we assessed the psychometric properties of a novel Italian translation using a combination of exploratory factor analysis and B-ESEM. A total of 950 adults completed the IES-2 alongside measures of positive body image, disordered eating, and psychological well-being. Results indicated that a 4-factor B-ESEM model had adequate fit to the data and that fit was improved when the correlated uniqueness of seven negatively worded IES-2 items was accounted for. This model of IES-2 scores showed adequate internal consistency and good test-retest reliability up to three weeks. Evidence of construct validity was good in terms of a global IES-2 factor, and broadly supported in terms of its specific-factors. These results highlight the utility of a B-ESEM framework for understanding the dimensionality of IES-2 scores and may help scholars better understand the extent to which the IES-2 adequately operationalises the construct of intuitive eating. Previous article in issue

Item Type: Journal Article
Keywords: Intuitive eating, Eating styles, Test adaptation, Italy, Exploratory structural equation modelling, Bifactor analysis
Faculty: Faculty of Science & Engineering
SWORD Depositor: Symplectic User
Depositing User: Symplectic User
Date Deposited: 05 Jul 2021 11:26
Last Modified: 09 Sep 2021 18:50
URI: https://arro.anglia.ac.uk/id/eprint/706703

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