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http://www.ncbi.nlm.nih.gov/pubmed/17457072
Interesting article overall, especially this part
Interesting article overall, especially this part
Small Groups Dont Work
The commitment to tutored small-group activity accounts not only for most of the cost and logistical difficulties of PBL, but it is also the basis for an unacceptable variability in the student experience, a general low level of discourse, and an inherent conflict with the professed principle of self-directed learning.
Anyone who has ever used small-group teaching has heard student feedback that small groups dont work because of inevitable differences in ability, motivation, and grading practices among tutors. One might argue that the variability could be countered with instruments to assess tutor effectiveness and programs for faculty development,16 but all this adds to the costs, and there is no assurance of a successful outcome. Seeking solutions to the problems with small-group dynamics in PBL seems to be spawning an industry among educationalists.1719 The need for some perspective on group work as a means to an end rather than an end in itself has been discussed.20,21
The sophistication of discussion in an educational exercise is limited by the knowledge of the participants. Slavin,22 an articulate proponent of small-group teaching, discusses the potential cognitive advantages of collaboration with peers. Slavin states that students can benefit either in the role of tutor through the opportunity to elaborate ideas, or in the role of tutee, guided by a more capable peer who is likely operating within ones zone of proximal development (Vygotskys term 23 to describe the trajectory of potential growth from a students current lower level of competence under the guidance of someone more accomplished). Allowing some assumptions about positive group dynamics and shared motivation, there is some initial appeal to this vision of a group potentially achieving more in the cognitive realm than any individual could accomplish alone. The problem is that the zone of proximal development among peers is very small, but the world of ideas in medicine is very large. The student centeredness of the small-group process (which, in pure PBL, includes allowing students to set the agenda of study issues) tends toward an amateurish and dissipated experience that can never get beyond the students own resources. Schmidt 24 suggests that students need at least some minimum level of structure, and that if it is not provided by prior knowledge or cues as to what to focus on from the environment of the exercise, students will look to tutors. Unfortunately, in the multiple small-group setup, content expertise among tutors will be the exception rather than the rule,25 and thus there is no one authoritative to turn to for expert insight. Even the most committed proponent of PBL would be hard pressed to defend the position that this setup leads to a high-level, realistic discussion of medical issues. Transcripts of actual discussions in PBL group that proponents select as examples of effective collaboration speak for themselves.26
Finally, there is the question of whether mandatory small-group participation is appropriate at this level of education and how it can be reconciled with the idea of self-directed learning. Tennant (summarized by Miflin 27) observes that among adult learners, a fundamental tension exists between the ethic of individualism and the spirit of collectivism and that this tension threatens to undermine the small-group process. The spirit of collectivism is captured in Slavins motivational perspective on small-group success, which requires that shared goals and social cohesiveness drive the process.22 One might legitimately ask to what extent this is realistic in medical school. The ethic of individualism, which could include respect for personal preference for independent modes of study, seems incompatible with a system where grades depend on participation in small-group activities. At some fundamental level, PBL is at odds with itself on this point. Proponents vacillate between the idea that students should find their own solutions and the idea that group work is the only legitimate venue for learning. Colliver has commented on the loose reasoning that justifies this stand on group work, a reasoning that seems to equate the idea that knowledge is a social construct with the conclusion that learning necessarily involves social (small-group) interaction.28