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Developing and Validating an Instrument to Evaluate Theory-Based Behavioral Antecedents of Consuming a High-Fiber Diet

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  • Paul Branscum

    (Department of Kinesiology and Health, College of Education, Health and Society, Miami University, Oxford, OH 45056, USA)

Abstract

Obesity is a major public health concern, with low consumption of fiber-rich foods (e.g., fruits and vegetables) commonly cited as a causal factor. The purpose of this study was to evaluate the validity of a survey measuring the constructs of the Reasoned Action Approach under the context of consuming a high-fiber diet. After an initial draft of the survey was developed, it was evaluated by a panel of six experts to establish face and content validity. Next, data were collected from an adult sample ( n = 878), and psychometric data revealed indices of reliability (Cronbach’s alpha) and validity (confirmatory factor analysis). The average age of adults was 51.5 years (±12.8), and a majority were Caucasian (81%), and women (93%). With regards to construct validity, the model structure had adequate fit (e.g., Comparative Fit Index = 0.960). In addition all items loaded significantly on its corresponding scale. For internal consistency reliability, all Cronbach’s alpha scores were > 0.70. Overall the survey appears to be a promising tool for researchers and practitioners. Understanding the theoretical determinants of fiber consumption will help tie theory together with practice.

Suggested Citation

  • Paul Branscum, 2020. "Developing and Validating an Instrument to Evaluate Theory-Based Behavioral Antecedents of Consuming a High-Fiber Diet," IJERPH, MDPI, vol. 17(12), pages 1-13, June.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:12:p:4342-:d:372853
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    References listed on IDEAS

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    1. Jihyun You & Jina Choo, 2016. "Adolescent Overweight and Obesity: Links to Socioeconomic Status and Fruit and Vegetable Intakes," IJERPH, MDPI, vol. 13(3), pages 1-11, March.
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