Document Type


Publication Date



Davis College of Agriculture, Natural Resources and Design


Division of Animal and Nutritional Sciences



To describe outcomes from intervention and dissemination of iCook 4-H.


Five-state, community-based participatory research and a randomized, controlled trial followed by a 5-state, nonrandomized dissemination test of the iCook 4-H curriculum with control and treatment groups.


Community and university sites.


Youths aged 9–10 years and their adult food preparer; 228 dyads in the intervention and 74 dyads in dissemination.


Theoretical frameworks were Social Cognitive Theory and the experiential 4-H learning model. Six 2-hour, biweekly sessions on cooking, eating, and playing together followed by monthly newsletters and boosters until 24 months, expanded to 8 sessions for dissemination.

Main Outcome Measure(s)

Youth body mass index (BMI) z-scores, measured height and weight, and youth/adult program outcome evaluations surveys.


Linear mixed models, group, time, and group × time interaction for BMI z-score and program outcomes changes. Significance levels = P ≤ .05; interaction term significance = P ≤ .10.


In intervention, treatment BMI z-scores increased compared with controls based on significant interaction (P = .04). For odds of being overweight or obese at 24 months, there was no significant interaction (P = .18). In dissemination, based on significant interaction, treatment youths increased cooking skills (P = .03) and treatment adults increased cooking together (P = .08) and eating together (P = .08) compared with controls.

Conclusions and Implications

iCook 4-H program outcomes were positive for mealtime activities of cooking and eating together. The program can be successfully implemented by community educators. The increase in BMI z-scores needs further evaluation for youths in cooking programs.

Source Citation

White, A. A., Colby, S. E., Franzen-Castle, L., Kattelmann, K. K., Olfert, M. D., Gould, T. A., Hagedorn, R. L., Mathews, D. R., Moyer, J., Wilson, K., & Yerxa, K. (2019). The iCook 4-H Study: An Intervention and Dissemination Test of a Youth/Adult Out-of-School Program. Journal of Nutrition Education and Behavior, 51(3), S2–S20.


Copyright 2019 The Authors. Published by Elsevier, Inc. on behalf of the Society for Nutrition Education and Behavior. This is an open access article under the CC BY license. (

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