- Two distinct subgroups of students in heterogeneous groups emerged: high-ability students in heterogeneous groups who performed as well as, or better than those in homogeneous groups and high-ability students in heterogeneous groups who performed less well than those in homogeneous groups.
- The science knowledge of the three group composition subgroups did not seem to differ in any substantial or systematic way prior to group work.
- Three main findings: 1) high-ability students performed well in homogenous groups and in some heterogeneous groups but not in other heterogeneous groups, 2) the types of group interactions that occurred during group work strongly influenced performance 3) group interaction predicted student performance more strongly than did either student ability or the overall ability composition of the group.
- Some of the variables that directly predicted student performance: the level of help that high-ability students received and the frequency with which they produced worked at a lower level than the test answers they provided. The frequency of negative socio-emotional behavior has an indirect effect on performance by significantly predicting the level of help received and lower-level work than students provided previously.
- What accounts for the different routes that high-ability students in heterogeneous groups take is not clear.
- Some heterogeneous groups may function better than others, with consequent effects on outcomes.
- Group functioning, not group composition, may be most likely to predict outcomes for high-ability students.
- For heterogeneous groups to function well, high-ability students should collaborate fully with their group mates and welcome their participation, share their own knowledge fully, and invite others’ suggestions, challenges, and corrections.
- The quality of group functioning served as the strongest predictor of high-ability students’ performance and explained much of the effect of group composition.