ICOS Presents:

"Too many cooks spoil the broth: How high status individuals decrease group effectiveness"

Professor Jeffrey Polzer

Harvard Business School, Organizational Behavior

October 21, 2005

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Accompanying Slides - Start time given in (HH:MM:SS) Back to the ICOS Home Page

Introduction (00:00:00)

Title Slide (00:01:53)

Hiring Stars (00:05:14)

Research Questions (00:10:24)

Agenda (00:11:06)

Group Effectiveness (00:11:37)

Predictors of Group Effectiveness (00:13:54)

Individual Status (00:21:17)

Scope Conditions (00:23:10)

Hypothesis 1 (00:24:38)

Hypothesis 2 (00:33:26)

Hypothesis 2 (00:35:24)

Hypothesis 3 (00:36:07)

Hypothesis 3 (00:37:01)

Hypothesis 4 (00:39:16)

Hypothesis 4 (00:54:14)

Hypothesis 5 (00:54:26)

Hypothesis 5 (00:55:11)

Overview of Study (00:55:40)

Sample (00:58:11)

Some of the Firms (01:00:38)

Some of the Sectors (01:01:24)

Outcome: Group Effectiveness (01:01:42)

Predictor: Analyst Performance (01:03:45)

Predictor: Analyst Status (01:05:39)

Moderator: Task Interdependence (01:08:52)

Control Variables (01:12:17)

Control Variables (01:13:19)

Timeline (01:13:41)

Results: Controls (01:14:08)

Results: H1 (individual performance) (01:14:32)

Results: H2 (linear effect of stars) (01:14:55)

Resuts: H3 and H4 (curvilinear) (01:15:08)

Results: H4 supported (01:15:30)

Results: H5 (moderation) (01:19:48)

Results: H5, Low interdependenc (01:19:56)

Results: H5, High interdependenc (01:20:08)

Contributions (01:20:28)

Presentation of Tile (01:24:06)

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