Motivation is a key factor for child development, but very few studies have examined child and family predictors of both child task and perceived motivation. Thus, the three aims of this 6-month longitudinal study in preschoolers with global developmental delays (GDD) were to explore: 1) differences between task and perceived motivation in…

This investigation explored the relationship between scholastic grades in science in junior and senior high school students and ability of students to perform formal operational tasks. The findings indicated that at certain grade levels and in certain subject areas, public school science students who demonstrate formal operational logic tend to…

The relative development of Piagetian concrete logical operational abilities was investigated in Mexican American and Anglo American children. Performance was assessed on eight classification tasks and three forms of transitivity, measuring seriation skills. One phase of the study compared the performances of 30 Anglo and 30 Mexican American…