Examined the relation between the spontaneous occurrence in play of simple two-part action sequences and the frequency of these sequences and their components following modeling at 12, 15, and 19 months of age. Play following modeling was typically more advanced but only 19-month-old children generally were able to imitate complete sequences.…

Modeling and direct instruction were used to train children to cooperate rather than compete. Children in treatment conditions showed significantly more cooperation than did control groups after immediate assessment. Seven weeks later age but not treatment differences were observed in generalization of training. (Author/DB)