Group Dynamics
Groups can make worse decisions than individuals due to groupthink, biased information search, and competitive dynamics that suppress cognitive diversity and critical thinking, undermining the potential benefits of collective decision-making.
THE IDEA
Group Dynamics
Groups can pool information, challenge assumptions and catch mistakes that individuals miss. They can also become more confident without making better decisions. Two obstacles are groupthink, in which pressure for agreement discourages dissent, and biased information search, in which members favor evidence that supports the group’s view.
Critical thinking helps a group make use of its members’ different knowledge. Each person can examine assumptions, identify hidden values, evaluate evidence and test conclusions. Those contributions matter only if members are willing and able to voice them. Pressure to conform can suppress the differences that made the group useful in the first place.
Competition within a group can also discourage participation. Social exchange theory offers one explanation: people consider what they stand to gain or lose by sharing. If colleagues are competing for recognition or promotion, disclosing useful knowledge may feel like giving a rival an advantage. Trust makes sharing easier. A company can praise teamwork while rewarding individual performance in ways that undermine it. Alternative structures, including flatarchies and holacracies, try to address this tension by organizing work more collaboratively.
Several biases affect which information reaches the discussion and how members assess it:
- Information-sampling bias: groups tend to repeat information everyone already knows while giving less attention to information held by only one member.
- Ownership bias: members tend to value their own information more highly than information supplied by others.
- Preference effect: members favor information consistent with their initial preferences.
These tendencies need not involve deliberate withholding. Familiar or preference-consistent information may come to mind more easily. A meeting can therefore contain plenty of discussion while leaving important evidence unexamined.
The Motivated Information Processing in Groups model distinguishes two motivational dimensions. Epistemic motivation concerns the effort members are willing to spend developing an accurate understanding of the problem. Social motivation concerns whose outcomes they seek to advance, including their own and those of other group members. Both help explain how much information a group shares, how carefully it evaluates that information and whose interests shape the decision.
When to use it
When a product development team is deciding on features, group dynamics may lead to overvaluing the team's own ideas (ownership bias) and ignoring user feedback, resulting in a product that fails to meet market needs.
In a corporate strategic planning session, competitive dynamics between departments can cause selective information sharing, leading to a plan that does not account for cross-functional risks.
During a hiring committee meeting, groupthink may cause members to avoid questioning the suitability of a charismatic candidate, leading to a poor hiring decision.
When evaluating investment opportunities, a team may experience preference effect, discounting negative data about a favored option, resulting in a financially harmful investment.
FROM THEORY TO EVERYDAY LIFE
In practice
Marketing Campaign Groupthink
A marketing team unanimously agrees on a campaign strategy without critically evaluating alternatives. Dissenting opinions are suppressed to maintain harmony, leading to a campaign that fails to resonate with the target audience because no one challenged the underlying assumptions.
Boardroom Information-Sampling Bias
During a board meeting, members repeatedly discuss widely known financial data (shared information) while neglecting unique insights from individual departments (unshared information). This causes the board to overlook a critical operational risk that only the operations manager knew about.
A MOMENT TO REFLECT
Put it to work.
Think of a recent group decision you were part of. Did you notice any signs of groupthink or biased information sharing? How could the process be improved?
How does competition within a team affect members' willingness to share unique knowledge? What changes to reward systems could foster more collaboration?
In what ways might your own preference for information that confirms your initial views (preference effect) have influenced a group decision? How can you counteract this tendency?
Often confused with
CONTINUE THE CONVERSATION
Source texts
- Evidence-Based Decision-Making How to Leverage Available Data and Avoid Cognitive Biases (Andrew D. Banasiewicz)