Examines the dynamics involved when preschoolers aged five years attempt to build replicas of Lego models, either by working alone or with another. Results show that collaboration was more conducive to learning than was independent work and that children were able to generalize their skills. (Author/RWB)

Effective family problem solving was studied in 97 families of elementary-school-aged children with definite- and indefinite-solution tasks. Incentive and task independence were manipulated. It was found that definitions of effective problem solving based on directly observed measures of group interaction were more valid than definitions based on…