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%