This study was a subset of another study for which a proportion of children were randomly selected per class. All parents gave consent for their children's participation. Of the children, 50 were girls and 56 were boys. These 106 children were approximately six years of age and in their second year of kindergarten (M ¼ 6; 2, SD ¼ 0; 3, ranging from 5; 5 years to 7; 3 years). All children were native Dutch and generally came from middle socioeconomic backgrounds.