Intro to Organizational Behavior (OB): Perception and Decision Making - Group Decision, Making Groupthink Groupshift Brainstorming Nominal Group Technique Delphi

Group Decision Making: Study Guide

What This Is

Group decision making refers to the process where multiple individuals collectively analyze problems, generate solutions, and choose a course of action. It matters because teams often outperform individuals in complex tasks (e.g., innovation, crisis response) but are vulnerable to biases like groupthink (suppressing dissent) or groupshift (extreme positions). For example, NASA’s 2003 Columbia shuttle disaster was partly attributed to groupthink—engineers downplayed safety concerns to avoid delaying the mission, leading to catastrophic failure. Effective group decision-making techniques (e.g., brainstorming, Nominal Group Technique, Delphi) can mitigate these risks and leverage diverse perspectives.

Key Theories & Models

• Groupthink (Irving Janis, 1972): A mode of thinking where group members prioritize harmony over critical evaluation, leading to flawed decisions. Symptoms: Illusion of invulnerability, self-censorship, pressure on dissenters. Implication: Encourage devil’s advocacy (e.g., Google’s "Project Aristotle" found psychological safety reduces groupthink). Example: Bay of Pigs invasion (1961)—Kennedy’s advisors suppressed doubts to avoid conflict, resulting in a failed operation.

• Groupshift (Stoner, 1961): Groups adopt more extreme positions after discussion (riskier or more cautious than individuals would alone). Causes: Diffusion of responsibility, persuasive arguments, social comparison. Implication: Use structured techniques (e.g., Nominal Group Technique) to balance input. Example: Enron’s reckless investments—executives reinforced each other’s overconfidence, leading to extreme financial risks.

• Brainstorming (Osborn, 1953): A free-flowing idea-generation technique where quantity is prioritized over quality, and criticism is deferred. Implication: Works best with diverse teams and clear rules (e.g., IDEO’s design sprints use timed brainstorming to innovate products like the Apple mouse). Limitation: Social loafing and production blocking can reduce effectiveness.

• Nominal Group Technique (NGT) (Delbecq & Van de Ven, 1971): A structured method where individuals silently generate ideas, share them round-robin, and vote anonymously. Implication: Reduces dominance by loud voices (e.g., Southwest Airlines uses NGT to improve customer service processes). Steps: Silent idea generation-Round-robin sharing-Discussion-Voting.

• Delphi Technique (Dalkey & Helmer, 1963): Experts answer questionnaires anonymously in multiple rounds, with feedback between rounds to refine consensus. Implication: Ideal for remote teams or high-stakes decisions (e.g., Netflix used Delphi to forecast streaming trends). Advantage: Eliminates group pressure; disadvantage: time-consuming.

• Social Loafing (Ringelmann Effect): Individuals exert less effort in groups than when working alone. Implication: Assign clear roles and accountability (e.g., Zappos combats loafing by using small, autonomous "circles" with defined metrics). Example: Tug-of-war experiments show individuals pull 20% harder alone than in a group.

• Cognitive Diversity (Page, 2007): Teams with varied perspectives (e.g., expertise, problem-solving styles) outperform homogeneous groups. Implication: Actively seek diverse viewpoints (e.g., Pixar’s "Braintrust"—a cross-functional team that critiques films to avoid groupthink). Trap: Diversity without psychological safety leads to conflict, not innovation.

• Vroom-Yetton-Jago Model (1973): A decision-making framework to determine when to involve a group (e.g., autocratic vs. consultative vs. group consensus). Implication: Use when acceptance (not just quality) matters (e.g., Patagonia’s employee-led environmental policies). Key question: "Does the team have relevant expertise, and is buy-in critical?"

Step-by-Step Application

How to Improve Group Decision Making

1. Diagnose the Problem:
2. Ask: Is the team avoiding conflict (groupthink)? Taking extreme risks (groupshift)? Dominated by a few voices?

3. Tool: Use Janis’s groupthink symptoms checklist (e.g., "Do members self-censor?").

4. Choose the Right Technique:

5. Brainstorming: For creative, low-stakes ideas (e.g., marketing campaigns).
6. NGT: For structured, high-stakes decisions (e.g., budget allocations).
7. Delphi: For expert-driven, remote consensus (e.g., R&D roadmaps).

8. Example: Amazon’s "PR/FAQ" (a written brainstorming tool) forces teams to articulate ideas before discussion.

9. Set Ground Rules:

10. For brainstorming: "No criticism until all ideas are shared."
11. For NGT/Delphi: "Anonymous voting to reduce pressure."

12. Example: Pixar’s "Plussing"—critiques must include a suggestion (e.g., "I don’t like X, but what if we tried Y?").

13. Assign Roles:

14. Devil’s advocate: Challenges assumptions (e.g., Intel’s "constructive confrontation").
15. Facilitator: Ensures equal participation (e.g., McKinsey’s "round-robin" discussions).

16. Timekeeper: Prevents tangents (e.g., Google Ventures’ design sprints).

17. Evaluate Outcomes:

18. After the decision, ask: Did we consider all perspectives? Were dissenting views heard?
19. Tool: After-Action Review (AAR)—used by the U.S. Army to debrief decisions.

20. Example: Netflix’s "Sunshining"—teams publicly share mistakes to improve future decisions.

21. Iterate:

22. Use feedback to refine the process (e.g., Spotify’s "squads" experiment with different decision techniques).

Common Misconceptions

• Misconception: Brainstorming always leads to better ideas than individual work. Correction: Research shows individual brainstorming (e.g., "brainwriting") often generates more ideas because it avoids production blocking. Example: IDEO found that hybrid approaches (individual + group) work best.

• Misconception: Groupthink only happens in high-pressure, crisis situations. Correction: It can occur in any cohesive group, even in routine decisions. Example: Kodak’s failure to adopt digital photography—engineers downplayed threats to avoid upsetting leadership.

• Misconception: Groupshift means groups always become more risky. Correction: Groups can shift toward caution (e.g., banks after the 2008 financial crisis became overly conservative in lending). Key: The shift depends on the group’s initial leanings.

• Misconception: The Delphi Technique is only for futurists or academics. Correction: It’s used in business for forecasting (e.g., IBM’s AI strategy) and policy-making (e.g., WHO’s pandemic response plans).

• Misconception: Nominal Group Technique (NGT) is just brainstorming with voting. Correction: NGT reduces social pressure by requiring silent idea generation first. Example: Southwest Airlines used NGT to redesign boarding processes, avoiding dominance by senior employees.

Exam / Case Interview Tips

1. Question Pattern: "Your team is making a high-stakes decision but seems overly confident. What’s happening, and how would you fix it?"
2. Answer: Diagnose groupthink (symptoms: illusion of invulnerability, self-censorship). Fix with devil’s advocacy or NGT to surface dissent.

3. Example: NASA’s Challenger disaster—engineers suppressed concerns; a devil’s advocate might have saved lives.

4. Tricky Distinction: Groupthink vs. Groupshift

5. Groupthink: Pressure for unanimity-poor decisions (e.g., Enron’s "yes-men" culture).

6. Groupshift: Discussion leads to extreme positions (e.g., Reddit’s WallStreetBets taking risky trades).

7. Case Interview Trap: "The team is arguing—is this a bad sign?"

8. Answer: Not necessarily! Storming (Tuckman’s model) is normal in team development. Key: Is the conflict task-related (healthy) or personal (toxic)?

9. Example: Netflix’s "radical candor" encourages debate to improve decisions.

10. Vroom-Yetton-Jago Shortcut:

11. If time is critical-autocratic (e.g., Elon Musk’s "move fast" decisions at Tesla).
12. If buy-in is critical-group consensus (e.g., Patagonia’s employee-led sustainability policies).

Quick Practice Scenario

Scenario: A product team at a tech startup is designing a new app feature. During brainstorming, two senior engineers dominate the conversation, and junior members stay silent. After the meeting, the team votes to pursue a high-risk feature, even though some privately had doubts. Question: What two group decision-making problems are occurring, and what technique would you use to improve the process?

Answer:
1. Social loafing (juniors not contributing) + groupshift (team adopted a riskier position).
2. Solution: Use Nominal Group Technique (NGT) to ensure equal input and anonymous voting to reduce pressure.

Last-Minute Cram Sheet

1. Groupthink: Pressure for unanimity-poor decisions (e.g., NASA Columbia). Not just "bad decisions"—specific symptoms (self-censorship, illusion of invulnerability).
2. Groupshift: Groups adopt more extreme positions after discussion (risky or cautious). Not always riskier—can shift toward caution (e.g., post-2008 banks).
3. Brainstorming: Quantity over quality, defer criticism. Limitation: Social loafing, production blocking.
4. Nominal Group Technique (NGT): Silent idea generation-round-robin sharing-voting. Best for: Reducing dominance.
5. Delphi Technique: Anonymous expert rounds-consensus. Best for: Remote teams, high-stakes decisions.
6. Vroom-Yetton-Jago: When to involve a group (autocratic vs. consultative vs. consensus).
7. Cognitive Diversity: Varied perspectives-better decisions (e.g., Pixar’s Braintrust).
8. Social Loafing: Individuals exert less effort in groups (e.g., tug-of-war experiments).
9. Devil’s Advocate: Role to challenge assumptions (e.g., Intel’s constructive confrontation).
10. After-Action Review (AAR): Debrief to improve future decisions (e.g., U.S. Army, Netflix).