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Fruit and vegetable shopping practices and social support scales: A validation
Tom Baranowski1, Mariam Missaghian, Alison Broadfoot
1Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, 1100 Bates St, Room 2038, Houston, TX 77030-2600, USA. tbaranow@bcm.tmc.edu
Journal of Nutrition Education and Behavior
|December 5, 2006
Summary
New scales effectively measure fruit and vegetable shopping practices and social support. These validated tools enhance understanding of purchasing behaviors and their impact on home availability.
Area of Science:
- Behavioral Science
- Nutrition Science
- Psychometrics
Background:
- Understanding factors influencing fruit and vegetable consumption is crucial for public health.
- Assessing shopping practices and social support provides insights into dietary behaviors.
- Validated measurement tools are needed to accurately capture these constructs.
Purpose of the Study:
- To evaluate the psychometric properties of novel scales designed to measure fruit and vegetable shopping practices.
- To assess the reliability and validity of new scales assessing social support for purchasing fruits and vegetables.
- To determine the relationship between these new scales and home fruit and vegetable availability.
Main Methods:
- 166 food shoppers with children were recruited from grocery stores.
- Data were collected via telephone interviews at two time points, six weeks apart.
- Psychometric analyses, including classical test theory and item response theory, were employed.
Main Results:
- Single-dimension scales demonstrated good reliability and explained significant variance in shopping practices and social support.
- Item response theory analysis indicated a range of difficulty estimates for scale items.
- All scales showed significant correlations with home fruit and vegetable availability, supporting construct validity.
Conclusions:
- The developed scales for shopping practices and social support exhibit strong psychometric characteristics.
- These validated scales are valuable instruments for researchers and practitioners.
- The scales can contribute to a deeper understanding of influences on fruit and vegetable purchasing and consumption.
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