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Group Decision Making I: Task Content and Processes (Coffee hour today) (Midpoint report due Thursday 11/11)

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Presentation on theme: "Group Decision Making I: Task Content and Processes (Coffee hour today) (Midpoint report due Thursday 11/11)"— Presentation transcript:

1 Group Decision Making I: Task Content and Processes (Coffee hour today) (Midpoint report due Thursday 11/11)

2 Group vs. Individual Decision Making 20 questions Some research evidence –Time: 4< 2 < 1 –Person hours: 4 > 2 > 1 Groups: faster, but less efficient

3 Where did the productivity go?

4 Ivan Steiner: AP = PP - PL Actual Productivity of the Group Potential Productivity of the Group Process Losses

5 Sources of PL Coordination, communication, conflict Groupthink Social loafing

6 AP, PP, PL = Function of…. Task –Clearly individual –Clearly group –In between Group size

7 Disjunctive tasks Group productivity = best individual member “Eureka” task: 20 questions

8 # of people 1 n PL # of people 1 n PP # of people 1 n AP _ =

9 Conjunctive tasks Group productivity = worst individual member Mountain climbing, study group, assembly line

10 # of people 1 n PL # of people 1 n PP # of people 1 n AP _ =

11 Task affects productivity, but generally…... PL increases at marginally increasing rate Org size “Management” 16-50 1/9 50-1501/8 150-9001/6 PL AP AP decreases after a certain point

12 Reducing Process Losses Parliamentary procedures Nominal Group Technique (NGT) Delphi Technique

13 Process interventions Reducing PL = Reduce process Can process increase productivity? Revision: AP=PP-PL+PG

14 A present Originally: –Exam 1: 25% –Exam 2: 25% Now: –Exam with higher grade: 35% –Exam with lower grade: 15%


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