Visiting Lecturer Program (21)

Speaker: Golnaz Tajeddin  
PhD student in Organizational Behavior and Human Resources Management at DeGroote School of Management, McMaster University

 Local Organizer: Roja Amininezhad

 Time: Sunday, Aug 26, 2007, 10:00 till 12:00
Location: School of Management, University of Tehran

This study investigates the emergence and influence of expertise in group decision making while performing a judgmental task. Previous studies focused on intellective tasks or compared the group performance with the performance of the best individual in the group. In this study, performance feedbacks are provided to groups to help group members compare the individual performances and identify the expert. Laboratory experiments were conducted in which 18 four-person cooperative groups were asked to perform a judgmental task for eight iterations each. Groups received performance feedbacks at the end of each iteration that reinforced a randomly selected expert. The amount of information conveyed to each group regarding the expertise level of each group member was measured with a novel application of information analysis that captures the expert’s gradual emergence. Experiment results supported the hypotheses of this study that (1) group members recognize the expert when working on a judgmental task with performance feedback and (2) while performing a judgmental task, the expert has more influence on the group decision making compared to others.

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