10.2 Group Performance Notes

Groups provide important benefits: more safety, better productivity, and access to shared resources.
Common assumption: groups always perform better than individuals because they have more members, knowledge, and ideas.
Research in social psychology shows this is not always the case: group dynamics can sometimes reduce performance.
Psychologists study how group processes affect productivity and decision-making (e.g., Baron & Kerr, 2003).
Core takeaway: group performance depends on how well group members work together; groups can either boost or hinder performance depending on coordination, motivation, and capability dynamics.

Key takeaways (summary):
- Groups can provide more resources, ideas, and expertise than individuals.
- Groups don’t automatically perform better; sometimes dynamics hurt performance.
- Group productivity and decision-making depend on how group members work together.
- Social psychologists study these factors to understand when groups help or harm effectiveness.
The study of group productivity emphasizes both the good and bad sides of working together.
Hackman & Morris (1975) introduced two key ideas:
- Process gains: the benefits of teamwork, such as when members combine ideas, inspire each other, or solve problems better together.
- Process losses: the downsides of teamwork, such as wasted time, conflicts, or when group discussions slow things down and reduce effectiveness.
Net effect on group performance depends on the balance between process gains and process losses; working in groups can boost performance or hold it back depending on cooperation quality.
Conceptual equation (summary):
- Let $G$ = Process gains and $L$ = Process losses. The net impact on performance can be represented as $P = G - L$ . (Conceptual model for how gains and losses combine to determine overall group performance.)

Three main challenges in groups (Hackman & Morris, 1975) that influence group performance: 1) Coordination challenges
- When many people work together, staying organized becomes harder.
- Issues include miscommunication, overlapping efforts, and conflicts that slow progress and reduce efficiency.
  2) Motivational challenges
- Group settings affect how much effort people invest.
- Social loafing: people may put in less effort because they feel their contributions won’t be noticed (Latané et al., 1979).
- Social compensation: sometimes stronger members work harder to compensate for weaker members (Williams & Karau, 1991).
  3) Individual capability challenges
- Group membership can either improve or harm individual performance.
- Social facilitation: people perform better when others are watching, especially on simple or well-practiced tasks (Zajonc, 1965).
- Social inhibition: people may perform worse on complex or unfamiliar tasks due to stress from being observed (Blascovich et al., 1999).
Summary: Groups can either enhance or impede performance depending on how coordination, motivation, and individual capabilities are managed.

Group decision-making combines knowledge, error correction, and creativity, but it also carries risks.
Benefits of group decision-making (Forsyth, 2010): groups are better at spotting and correcting mistakes and can generate new, creative solutions that individuals might not conceive alone.
Real-world relevance: group decisions are common in juries, political parties, and organizational boards.
However, two major risks compromise decision quality:
- Group polarization: groups sometimes make decisions that are more extreme than what members would choose individually.
- Groupthink: groups may push for agreement so strongly that they ignore alternatives or warning signs, leading to poor decisions.
These risks show that group decision-making is not inherently superior to individual decision-making; outcomes depend on managing group dynamics.

Key takeaways: Groups can improve decisions through more knowledge, error correction, and creativity (Forsyth, 2010). But risks include polarization and groupthink.
Group polarization specifics: groups tend to move toward more extreme positions than individuals would have chosen alone.
Core reference: Moscovici & Zavalloni (1969).
Group polarization occurs through three mechanisms:
- Informational influence: group discussions introduce new arguments or perspectives that support the members' side, increasing confidence in their original position (Moscovici & Zavalloni, 1969).
- Normative influence: the desire to be liked or to avoid disagreement leads individuals to align with the group’s emerging position (Deutsch & Gerard, 1955).
- Social identity effects: identification with the group reinforces alignment with its position, pushing the group toward a more extreme stance (Turner et al., 1987).
Overall implication: polarization arises because of cognitive and social processes that amplify initial leanings during group discussion.

Groupthink (definition and dynamics): a mode of thinking that occurs when a group values harmony and conformity over critical evaluation, leading to poor decisions.
Causes of groupthink:
- High group cohesion: strong desire to maintain unity and avoid conflict.
- Pressure to agree: explicit or implicit pressure to conform.
- Isolation from outside opinions: few external viewpoints to challenge the group.
Processes of groupthink:
- Group members silence doubts, suppress dissent, and fail to consider alternatives or warnings.
- A strong drive toward conformity reduces critical evaluation.
Outcomes of groupthink:
- Poor decisions, diminished creativity, and potentially serious consequences for organizations or governments.
Origins and example:
- The term groupthink was introduced by Irving Janis (1972).
- He studied President John F. Kennedy's 1962 decision to invade Cuba, which turned out badly, to illustrate how pressure to keep unity can silence doubts and lead to serious mistakes.
Related theoretical lens: social identity processes—people derive identity from group membership, which can reinforce alignment with the group's extreme position and suppress opposing views (Turner et al., 1987).

Key takeaways – Group Decision-Making (synthesis):
- Groups can make better decisions than individuals by combining knowledge, correcting errors, and generating creative solutions (Forsyth, 2010).
- But groups face risks: polarization (Moscovici & Zavalloni, 1969) and groupthink (Janis, 1972).
- Group polarization arises from informational influence, normative influence, and social identity effects (Moscovici & Zavalloni, 1969; Deutsch & Gerard, 1955; Turner et al., 1987).
Practical management implications:
- Manage group interactions carefully to improve decision quality.
- Balance discussion to include diverse opinions.
- Encourage critical thinking and dissent, and reduce excessive pressure to conform.
- Provide external viewpoints to counter isolation and cohesion-driven bias.
Real-world relevance: effective group decision-making requires deliberate processes and structures to mitigate polarization and groupthink, enhancing the collective wisdom of the group.