To examine the KCP effectiveness for increasing children’s FVFIRST and HDRINK during school lunch, 2 4 5 repeatedmeasures ANOVAs were conducted with two study groups (KCP
and control) and four grades (1st–4th) serving as between-subjects variables, and with five study phases serving as the within-subjects variable (one six-meal block under baseline conditions, four sixmeal blocks under reward conditions). FVFIRST was measured as
the number of six meals for which children ate 1/8 cup FV first during the meal. HDRINK was measured as the number of six meals for which children chose a low-fat and low-sugar healthy drink. (NOTE: To keep sample sizes as large as possible, we included in these analyses all children observed eating school-provided lunches for at least 6 of the 12 meals in baseline conditions, and for at least 24 of the 34 meals in reward conditions. These observed meals extended across the full three-month KCP application, but interspersed with home-packed lunches.) Because of the relatively large sample sizes and power of these ANOVAs, we used a
conservative criterion