Anna Marie Jones1, Cathi Lamp2, Marisa Neelon3, Yvonne Nicholson4, Connie Schneider5, Patti Wooten Swanson6, Sheri Zidenberg-Cherr7. 1. Center for Nutrition in Schools, Department of Nutrition, University of California, Davis, Davis, CA. 2. University of California Cooperative Extension Tulare County, Tulare, CA. 3. University of California Cooperative Extension Contra Costa County, Pleasant Hill, CA. 4. University of California Cooperative Extension Sacramento County, Sacramento, CA. 5. University of California Agricultural and Natural Resources, Davis, CA. 6. University of California Cooperative Extension San Diego County, San Diego, CA. 7. Center for Nutrition in Schools, Department of Nutrition, University of California, Davis, Davis, CA. Electronic address: sazidenbergcherr@ucdavis.edu.
Abstract
OBJECTIVE: To determine the validity and reliability of a nutrition knowledge questionnaire for adults in California. METHODS: A convenience sample of adults was recruited for cognitive interviews. A mail-based survey of 400 randomly selected addresses was used to assess internal consistency (Cronbach α). Researchers assessed content validity (Student t test) and test-retest reliability (Pearson correlation) in a convenience sample of university students who had previously taken a college nutrition course, compared with students who had not. RESULTS: Twenty adults participated in cognitive interviews, 94 adults returned the mailed questionnaire, and 48 university students participated in validity and reliability testing. Cronbach α = .91 and test-retest r = 0.95, demonstrating internal consistency reliability and test-retest reliability. Students who had taken a college-level nutrition course scored significantly higher compared with students who had not (P < .001), demonstrating construct validity. CONCLUSIONS AND IMPLICATIONS: Findings show that the questionnaire is a valid and reliable nutrition knowledge measure for use in California and may be of use in other places.
OBJECTIVE: To determine the validity and reliability of a nutrition knowledge questionnaire for adults in California. METHODS: A convenience sample of adults was recruited for cognitive interviews. A mail-based survey of 400 randomly selected addresses was used to assess internal consistency (Cronbach α). Researchers assessed content validity (Student t test) and test-retest reliability (Pearson correlation) in a convenience sample of university students who had previously taken a college nutrition course, compared with students who had not. RESULTS: Twenty adults participated in cognitive interviews, 94 adults returned the mailed questionnaire, and 48 university students participated in validity and reliability testing. Cronbach α = .91 and test-retest r = 0.95, demonstrating internal consistency reliability and test-retest reliability. Students who had taken a college-level nutrition course scored significantly higher compared with students who had not (P < .001), demonstrating construct validity. CONCLUSIONS AND IMPLICATIONS: Findings show that the questionnaire is a valid and reliable nutrition knowledge measure for use in California and may be of use in other places.
Authors: Richard Bukenya; Abhiya Ahmed; Jeanette M Andrade; Diana S Grigsby-Toussaint; John Muyonga; Juan E Andrade Journal: Nutrients Date: 2017-02-21 Impact factor: 5.717