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 computertailored nutrition education on fat reduction.

[1]  Henry L. Tosi.  A Theory of Goal Setting and Task Performance , 1991 .

[2]  Johannes Brug,et al.  Differences in psychosocial factors and fat consumption between stages of change for fat reduction , 1997 .

[3]  V. Strecher,et al.  Do tailored behavior change messages enhance the effectiveness of health risk appraisal? Results from a randomized trial. , 1996, Health education research.

[4]  J. Brug,et al.  Psychosocial Determinants of Fruit and Vegetable Consumption , 1995, Appetite.

[5]  L. Smith,et al.  To be or Not to Be , 1957, Journal of psychiatric nursing and mental health services.

[6]  J. Brug,et al.  Self-rated dietary fat intake: Association with objective assessment of fat, psychosocial factors, and intention to change , 1994 .

[7]  T. Baranowski,et al.  “To be or not to be…” fruits and vegetables , 1993 .

[8]  G. Block,et al.  Vitamin C and cancer prevention: the epidemiologic evidence. , 1991, The American journal of clinical nutrition.

[9]  Elliot B. Koffman.  Turbo Pascal , 1986 .

[10]  T. Ockhuizen,et al.  Comparison of dietary intake data with guidelines: some potential pitfalls (Dutch nutrition surveillance System). , 1993, Journal of the American College of Nutrition.

[11]  J. Blundell,et al.  Appetite and food intake with fat substitution by sucrose polyester , 1994 .

[12]  J. Brug,et al.  The impact of a computer-tailored nutrition intervention. , 1996, Preventive medicine.

[13]  V. Strecher,et al.  The effects of computer-tailored smoking cessation messages in family practice settings. , 1994, The Journal of family practice.

[14]  L. Lytle,et al.  The effectiveness of nutrition education and implications for nutrition education policy, programs, and research: a review of research , 1995 .

[15]  J Brug,et al.  The reliability and validity of a Dutch questionnaire on fat consumption as a means to rank subjects according to individual fat intake. , 1992, European journal of cancer prevention : the official journal of the European Cancer Prevention Organisation.

[16]  W. Willett,et al.  Diet and health: what should we eat? , 1994, Science.

[17]  R. Ziegler,et al.  US dietary patterns associated with fat intake: the 1987 National Health Interview Survey. , 1994, American journal of public health.

[18]  K. Glanz,et al.  Health behavior and health education : theory, research, and practice , 1991 .

[19]  J Brug,et al.  The Relationship between Self-Efficacy, Attitudes, Intake Compared to Others, Consumption, and Stages of Change Related to Fruit and Vegetables , 1997, American journal of health promotion : AJHP.

[20]  William J. McGuire,et al.  Attitudes and attitude change , 1985 .

[21]  Duane T. Wegener,et al.  Attitudes and attitude change. , 1997, Annual review of psychology.

[22]  E. A. Locke,et al.  A theory of goal setting & task performance , 1990 .

[23]  N. Weinstein.  The precaution adoption process. , 1988, Health psychology : official journal of the Division of Health Psychology, American Psychological Association.

[24]  V. Strecher,et al.  Improving dietary behavior: the effectiveness of tailored messages in primary care settings. , 1994, American journal of public health.

[25]  P. van Assema,et al.  The determinants of four cancer-related risk behaviours. , 1993, Health education research.

[26]  John C. Norcross,et al.  In Search of How People Change: Applications to Addictive Behaviors , 1993 .

[27]  Johannes Brug,et al.  Stages of change for fruit, vegetable and fat intake: consequences of misconception , 1998 .