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Social Facilitation, Bystander Effect and Social Loafing: Group Behavior Compared
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Several MCAT group-behavior terms sound alike. Sort them by what changes when other people are present.
The comparison
| Term | What happens | Mechanism |
|---|---|---|
| Social facilitation | Performance changes on a task in front of others | Arousal strengthens the dominant response |
| Social loafing | Less individual effort in a group | Diffused accountability when output is pooled |
| Bystander effect | Less likely to help when more people are present | Diffusion of responsibility |
| Deindividuation | Loss of self-awareness, norm breaking | Anonymity in a crowd |
| Group polarization | Group view becomes more extreme than the average starting view | Persuasive arguments and social comparison |
| Groupthink | Poor decisions from pressure for harmony | Cohesion, isolation, strong leader |
Social facilitation in detail
Others' presence raises arousal. Arousal improves easy or well-learned tasks (the dominant response is correct) and impairs hard or new tasks (the dominant response is wrong). This is the Yerkes-Dodson style pattern, applied to audiences.
Bystander effect
Darley and Latane studied it after the Kitty Genovese case. Larger groups lower the chance that any one person helps. Helping rises when the emergency is clear, a person is directly asked, or the helper feels competent.
Social loafing
It occurs when individual contributions cannot be identified. It shrinks when each person's work is tracked, the task is meaningful, or the group is small.
Common traps
- Using facilitation for all audience effects. Hard tasks get worse.
- Mixing loafing and bystander effect. Loafing is effort on a shared task; bystander is helping in an emergency.
- Treating polarization as moving to the middle. It moves to the extreme.
One-minute recap
- Facilitation: audience helps easy tasks, hurts hard ones.
- Loafing and bystander effect: diffusion of responsibility.
- Polarization: group pushes the shared view further out.
Check yourself: 5-question mini-quiz
1. When does an audience impair performance?
On difficult or unfamiliar tasks, via social facilitation.
2. What mechanism explains the bystander effect?
Diffusion of responsibility.
3. What reduces social loafing?
Making individual contributions identifiable.
4. What is group polarization?
A group's shared view becomes more extreme after discussion.
5. What does deindividuation involve?
Reduced self-awareness and norm breaking under anonymity.
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