A study examining small group performance replicated and extended a previous study by L. Kelly and R. L. Duran to reanalyze their operationalization of cohesiveness. To test the hypotheses of the original study and to explore questions about using the polarization index as an indication of group cohesiveness, the study used a large number of…

Over the past decade, many university-based administrator-preparation programs have evolved into curricula delivered through cohorts of about 20 to 25 students. However, little evidence exists about the long-term effect of cohort experience on aspiring principals' future professional practice. Anecdotal evidence suggests that students in cohorts…