The Impact of Computer-Tailored Feedback and Iterative Feedback on Fat, Fruit, and Vegetable Intake

Author:

Brug Johannes1,Glanz Karen2,Van Assema Patricia3,Kok Gerjo4,van Breukelen Gerard J. P.5

Affiliation:

1. Department of Social Studies, Open University, P.O. Box 2960, 6401 DL Heerlen, the Netherlands; phone: +31-45-5762399 (work), +31-43-3619823 (home); fax: +31-45-5762939;

2. Prevention and Control Program at the Cancer Research Center of Hawaii at the University of Hawaii, Manoa, in Honolulu

3. Department of Health Education and Health Promotion, Maastricht University

4. Department of Psychology, Maastricht University

5. Department of Methodology and Statistics at Maastricht University

Abstract

A randomized trial was conducted to study the impact of individualized computer-generated nutrition information and additional effects of iterative feedback on changes in intake of fat, fruits, and vegetables. Respondents in the experimental group received computer-generated feedback letters tailored to their dietary intake, intentions, attitudes, self-efficacy expectations, and self-rated behavior. After the first feedback letter, half of the experimental group received additional iterative feedback tailored to changes in behavior and intentions. The control group received a single general nutrition information letter in a format similar to the tailored letters. Computer-tailored feedback had a significantly greater impact on fat reduction and fruit and vegetable intake than did general information. Iterative computer-tailored feedback had an additional impact on fat intake. The results confirm that computer-generated individualized feedback can be effective in inducing recommended dietary changes and that iterative feedback can increase the longer term impact of computertailored nutrition education on fat reduction.

Publisher

SAGE Publications

Subject

Public Health, Environmental and Occupational Health,Arts and Humanities (miscellaneous)

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