The impact of computer-tailored feedback and iterative feedback on fat, fruit, and vegetable intake.
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 computer-tailored nutrition education on fat reduction.
Department of Social Studies, Open University, DL Heerlen, The Netherlands.
J
J
Brug
K
K
Glanz
P
P
Van Assema
G
G
Kok
G J
GJ
van Breukelen
D000328:Adult; D004041:Dietary Fats / Q000008:administration & dosage*; D005246:Feedback; D005247:Feeding Behavior / Q000523:psychology; D005260:Female; D005638:Fruit; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D009751:Nutritional Requirements; D052756:Nutritional Sciences / Q000193:education; D020377:Self Efficacy; D012984:Software; D011795:Surveys and Questionnaires; D014675:Vegetables
D004041:Dietary Fats