IB Psychology Topic Bystanderism Revision Notes (SL/HL)

Bystanderism: Why Crowds Reduce the Likelihood of Help

Bystanderism refers to the phenomenon where individuals are less likely to help in an emergency when others are present.
This concept was first explored following the 1964 murder of Kitty Genovese in New York, where multiple witnesses failed to intervene.

Note

Bystanderism is a key concept in social psychology.
It shows how situational and cognitive factors can override personal values and inhibit helping behaviour.

Key Studies: Two Experiments That Shaped the Field

Example

Darley and Latané (1968)
- Aim: To investigate the effect of group size on bystander intervention.
- Procedure: 72 university students were placed in separate rooms and communicated via intercom, believing they were alone, in groups of 2, or groups of 6.
- A confederate then simulated a seizure.
- Results: Alone: 85% helped; groups of 2: 62% helped; groups of 6: 31% helped.
- Conclusion: Helping decreases as group size increases, demonstrating diffusion of responsibility.

Example

Piliavin et al. (1969)
- Aim: To examine factors influencing helping behavior in a real-life setting.
- Procedure: A confederate collapsed on a New York subway, appearing either drunk or ill; observers recorded bystander reactions.
- Results: Ill victim: 95% helped; drunk victim: 50% helped.
- Diffusion of responsibility was not observed; helping was more likely when the victim appeared deserving.
- Conclusion: Helping is influenced by the perceived deservingness of the victim and a cost-reward analysis.

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Diffusion of Responsibility
1. When multiple bystanders are present, individuals feel less personal responsibility to act.
2. Demonstrated by Darley and Latané (1968): helping rates fell sharply as group size increased.

Example

In large crowds (concerts, public events), individuals often assume someone else will intervene, leading to collective inaction.

Pluralistic Ignorance
1. Bystanders look to others for cues on how to react.
2. If others appear unconcerned, individuals may interpret the situation as a non-emergency even when it is one.

Example

Latané and Darley (1968) found that participants were less likely to report smoke filling a room when others ignored it.
This demonstrates pluralistic ignorance: others' calm reactions signal that there is no danger.

Cost-Reward Analysis
1. Bystanders weigh the costs (harm, time, effort) against the benefits of helping.
2. If perceived costs outweigh benefits, individuals are less likely to intervene.

Example

Piliavin et al. (1969) showed bystanders were more likely to help the ill victim (low cost) than the drunk victim (higher perceived cost).

Cultural and Situational Variables: How Context Shapes Helping

Cultural Influences
1. Collectivist cultures may promote helping due to stronger community ties.
2. Individualist cultures emphasise personal responsibility, which may reduce intervention in group settings.

Example

Levine et al. (2001)
- Aim: To compare helping rates across cultures with different collectivist-individualist orientations.
- Procedure: Confederates staged situations requiring help in cities across multiple countries.
- Results: Higher helping rates were found in collectivist societies (e.g., Brazil) than in individualist ones (e.g., the United States).
- Conclusion: Cultural orientation shapes the likelihood of bystander intervention.

Situational Factors
1. Ambiguity: Unclear situations reduce the likelihood of intervention.
2. Time Pressure: Individuals in a hurry are less likely to help, even when personally motivated.

Example

Darley and Batson (1973)
- Aim: To investigate whether time pressure overrides personal values in helping decisions.
- Procedure: Seminary students were sent to give a talk; some were told they were late, others were not.
- A person in distress was planted on their route.
- Results: Students in a hurry were far less likely to stop and help, regardless of their personal values.
- Conclusion: Situational demands can override even strong moral convictions.

Evaluation

Strengths
1. Ecological Validity: Studies like Piliavin et al. (1969) used real-life settings, enhancing the generalisability of findings.
2. Practical Applications: Research on bystanderism has informed public awareness campaigns and emergency response training.
Limitations
1. Ethical Concerns: Deception and induced distress in Darley and Latané (1968) raise issues around informed consent and participant welfare.
2. Cultural Bias: Many studies were conducted in Western contexts, limiting applicability to other cultures.
Alternative Explanations
1. Empathy-Altruism Hypothesis (Batson et al., 1981): argues that empathy, not just situational factors, drives helping behavior.
2. Social Identity Theory: individuals may be more likely to help those perceived as part of their in-group.

Common Mistake

Do not confuse diffusion of responsibility and pluralistic ignorance.
- Diffusion of responsibility: assumes someone else will take action.
- Pluralistic ignorance: assumes the situation is not an emergency because others look calm.

Applications: Reducing Bystanderism in Real Life

Education
1. Teaching individuals about the bystander effect increases awareness and promotes intervention.
Clear Roles
1. Assigning specific responsibilities in emergencies reduces diffusion of responsibility.

Example

Public campaigns like "See Something, Say Something" encourage individuals to act rather than assume others will intervene.

Exam technique

When evaluating bystanderism research, always link each study to the specific factor it demonstrates: diffusion of responsibility, pluralistic ignorance, or cost-reward.
Piliavin et al. (1969) is the strongest study for ecological validity; Darley and Latané (1968) is strongest for internal validity.

Active recall

Explain how diffusion of responsibility and pluralistic ignorance interact to influence bystander behaviour.
Can you think of a time when you witnessed bystanderism? What factors influenced your decision to act or not act?

Bystanderism: Why Crowds Reduce the Likelihood of Help

Bystanderism refers to the phenomenon where individuals are less likely to help in an emergency when others are present.
This concept was first explored following the 1964 murder of Kitty Genovese in New York, where multiple witnesses failed to intervene.

Note

Bystanderism is a key concept in social psychology.
It shows how situational and cognitive factors can override personal values and inhibit helping behaviour.

Key Studies: Two Experiments That Shaped the Field

Example

Darley and Latané (1968)
- Aim: To investigate the effect of group size on bystander intervention.
- Procedure: 72 university students were placed in separate rooms and communicated via intercom, believing they were alone, in groups of 2, or groups of 6.
- A confederate then simulated a seizure.
- Results: Alone: 85% helped; groups of 2: 62% helped; groups of 6: 31% helped.
- Conclusion: Helping decreases as group size increases, demonstrating diffusion of responsibility.

Example

Piliavin et al. (1969)
- Aim: To examine factors influencing helping behavior in a real-life setting.
- Procedure: A confederate collapsed on a New York subway, appearing either drunk or ill; observers recorded bystander reactions.
- Results: Ill victim: 95% helped; drunk victim: 50% helped.
- Diffusion of responsibility was not observed; helping was more likely when the victim appeared deserving.
- Conclusion: Helping is influenced by the perceived deservingness of the victim and a cost-reward analysis.

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Diffusion of Responsibility
1. When multiple bystanders are present, individuals feel less personal responsibility to act.
2. Demonstrated by Darley and Latané (1968): helping rates fell sharply as group size increased.

Example

In large crowds (concerts, public events), individuals often assume someone else will intervene, leading to collective inaction.

Pluralistic Ignorance
1. Bystanders look to others for cues on how to react.
2. If others appear unconcerned, individuals may interpret the situation as a non-emergency even when it is one.

Example

Latané and Darley (1968) found that participants were less likely to report smoke filling a room when others ignored it.
This demonstrates pluralistic ignorance: others' calm reactions signal that there is no danger.

Cost-Reward Analysis
1. Bystanders weigh the costs (harm, time, effort) against the benefits of helping.
2. If perceived costs outweigh benefits, individuals are less likely to intervene.

Example

Piliavin et al. (1969) showed bystanders were more likely to help the ill victim (low cost) than the drunk victim (higher perceived cost).

Cultural and Situational Variables: How Context Shapes Helping

Cultural Influences
1. Collectivist cultures may promote helping due to stronger community ties.
2. Individualist cultures emphasise personal responsibility, which may reduce intervention in group settings.

Example

Levine et al. (2001)
- Aim: To compare helping rates across cultures with different collectivist-individualist orientations.
- Procedure: Confederates staged situations requiring help in cities across multiple countries.
- Results: Higher helping rates were found in collectivist societies (e.g., Brazil) than in individualist ones (e.g., the United States).
- Conclusion: Cultural orientation shapes the likelihood of bystander intervention.

Situational Factors
1. Ambiguity: Unclear situations reduce the likelihood of intervention.
2. Time Pressure: Individuals in a hurry are less likely to help, even when personally motivated.

Example

Darley and Batson (1973)
- Aim: To investigate whether time pressure overrides personal values in helping decisions.
- Procedure: Seminary students were sent to give a talk; some were told they were late, others were not.
- A person in distress was planted on their route.
- Results: Students in a hurry were far less likely to stop and help, regardless of their personal values.
- Conclusion: Situational demands can override even strong moral convictions.

Evaluation

Strengths
1. Ecological Validity: Studies like Piliavin et al. (1969) used real-life settings, enhancing the generalisability of findings.
2. Practical Applications: Research on bystanderism has informed public awareness campaigns and emergency response training.
Limitations
1. Ethical Concerns: Deception and induced distress in Darley and Latané (1968) raise issues around informed consent and participant welfare.
2. Cultural Bias: Many studies were conducted in Western contexts, limiting applicability to other cultures.
Alternative Explanations
1. Empathy-Altruism Hypothesis (Batson et al., 1981): argues that empathy, not just situational factors, drives helping behavior.
2. Social Identity Theory: individuals may be more likely to help those perceived as part of their in-group.

Common Mistake

Do not confuse diffusion of responsibility and pluralistic ignorance.
- Diffusion of responsibility: assumes someone else will take action.
- Pluralistic ignorance: assumes the situation is not an emergency because others look calm.

Applications: Reducing Bystanderism in Real Life

Education
1. Teaching individuals about the bystander effect increases awareness and promotes intervention.
Clear Roles
1. Assigning specific responsibilities in emergencies reduces diffusion of responsibility.

Example

Public campaigns like "See Something, Say Something" encourage individuals to act rather than assume others will intervene.

Exam technique

When evaluating bystanderism research, always link each study to the specific factor it demonstrates: diffusion of responsibility, pluralistic ignorance, or cost-reward.
Piliavin et al. (1969) is the strongest study for ecological validity; Darley and Latané (1968) is strongest for internal validity.

Active recall

Explain how diffusion of responsibility and pluralistic ignorance interact to influence bystander behaviour.
Can you think of a time when you witnessed bystanderism? What factors influenced your decision to act or not act?

IB Psychology Bystanderism Notes

IB Psychology Bystanderism Notes

Bystanderism: Why Crowds Reduce the Likelihood of Help

Key Studies: Two Experiments That Shaped the Field

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Cultural and Situational Variables: How Context Shapes Helping

Evaluation

Applications: Reducing Bystanderism in Real Life

Bystanderism: Why Crowds Reduce the Likelihood of Help

Key Studies: Two Experiments That Shaped the Field

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Cultural and Situational Variables: How Context Shapes Helping

Evaluation

Applications: Reducing Bystanderism in Real Life

IB Psychology Bystanderism Notes

Biological Approach

Cognitive Approach

Sociocultural Approach

Option 1: Abnormal Psychology

Option 2: Developmental Psychology

Option 3: Health Psychology

Option 4: Human Relationships

IB Psychology Bystanderism Notes

Biological Approach

Cognitive Approach

Sociocultural Approach

Option 1: Abnormal Psychology

Option 2: Developmental Psychology

Option 3: Health Psychology

Option 4: Human Relationships

Bystanderism: Why Crowds Reduce the Likelihood of Help

Key Studies: Two Experiments That Shaped the Field

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Cultural and Situational Variables: How Context Shapes Helping

Evaluation

Applications: Reducing Bystanderism in Real Life

Bystanderism: Why Crowds Reduce the Likelihood of Help

Key Studies: Two Experiments That Shaped the Field

Factors Influencing Bystanderism: Diffusion, Ignorance, and Cost-Reward

Cultural and Situational Variables: How Context Shapes Helping

Evaluation

Applications: Reducing Bystanderism in Real Life