Psychosocial predictors of fruit and vegetable consumption among elementary school children

A self-efficacy questionnaire for fruit and vegetable (F&V)consumption among fourth and fifth grade students was developed,pilot tested with 140 students from one school and field testedwith 252 students from two schools. The questionnaire included34 items generated by inventorying behaviors targeted for changein the F&V school curriculum. The four subscales derivedfrom principal components analysis were labeled ‘after-schoolF&V snacks’; ‘breakfast and lunch F&V, andpaying for F&V'; ‘independent shopping for F&V';and ‘assisted shopping for F&V'; they accounted for43.8% of the total variance. Subscale test-re-test reliabilitiesand internal consistencies were acceptable. Criterion validitiesagainst F&V consumption from food records were low. Relationshipswere stronger with preferences and outcome expectations. Resultsfrom stepwise regression analyses indicated that preferenceswere the only significant predictors of fruit and total F&Vconsumption, as well as the main predictor of vegetable consumption;however, the models accounted for less than 13% of the variance.Nutrition education programs which target preferences may bemore effective in increasing F&V consumption among elementaryschool children than programs which target self-efficacy andoutcome expectations. However, since preferences accounted foronly small proportions of the variances, further research shouldconsider other issues such as availability.