What is the bystander effect?

People are less likely to help when others are present

Which psychologists ran the classic 1968 bystander experiments?

Stanley Milgram and Philip Zimbardo

What happened in the smoke-filled room experiment?

People alone reported smoke more often than people in groups

What does diffusion of responsibility mean?

Each person feels less responsible when others are present

What is pluralistic ignorance?

Assuming nothing is wrong because others look calm

What did the 1973 Good Samaritan study at Princeton find?

Religious students always helped

What did a 2019 study of real CCTV footage across three countries find?

Someone intervened in about nine of ten conflicts

Which tactic makes help more likely in an emergency?

Pointing to a specific person and giving a task

Shouting at the crowd in general

In another Darley and Latané study, what did participants hear over an intercom?

Someone apparently having a seizure

Bystander Effect Quiz: Why Crowds Stay Silent

A 1964 newspaper story claimed 38 neighbors ignored Kitty Genovese's murder, and this bystander effect quiz explores the research it sparked and the myths around it. Play an online set of 10 questions on John Darley and Bibb Latané, the smoke-filled room, diffusion of responsibility, the Good Samaritan study and newer CCTV research.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Definition
What is the bystander effect?
Case
Which 1964 New York case inspired research on bystanders?
Researchers
Which psychologists ran the classic 1968 bystander experiments?
Smoke
What happened in the smoke-filled room experiment?
Diffusion
What does diffusion of responsibility mean?
Ignorance
What is pluralistic ignorance?
Samaritan
What did the 1973 Good Samaritan study at Princeton find?
CCTV
What did a 2019 study of real CCTV footage across three countries find?
Tip
Which tactic makes help more likely in an emergency?
Seizure
In another Darley and Latané study, what did participants hear over an intercom?

Explanations: answer key for all 10 questions

Q1: What is the bystander effect?
Answer: People are less likely to help when others are present
The more bystanders there are, the less likely any one person is to act.
Q2: Which 1964 New York case inspired research on bystanders?
Answer: The murder of Kitty Genovese
Later reporting showed the famous 38 witnesses claim was exaggerated.
Q3: Which psychologists ran the classic 1968 bystander experiments?
Answer: John Darley and Bibb Latané
Their studies tested how group size affects helping.
Q4: What happened in the smoke-filled room experiment?
Answer: People alone reported smoke more often than people in groups
Participants with passive companions often sat still as smoke filled the room.
Q5: What does diffusion of responsibility mean?
Answer: Each person feels less responsible when others are present
Responsibility is spread across everyone, so no one feels it is their job.
Q6: What is pluralistic ignorance?
Answer: Assuming nothing is wrong because others look calm
People look to others for cues, and calm faces suggest there is no emergency.
Q7: What did the 1973 Good Samaritan study at Princeton find?
Answer: People in a hurry were less likely to help
Even seminary students rushing to give a talk often passed a person in need.
Q8: What did a 2019 study of real CCTV footage across three countries find?
Answer: Someone intervened in about nine of ten conflicts
Larger groups actually made it more likely that at least one person helped.
Q9: Which tactic makes help more likely in an emergency?
Answer: Pointing to a specific person and giving a task
Saying You in the blue jacket, call an ambulance removes doubt about who should act.
Q10: In another Darley and Latané study, what did participants hear over an intercom?
Answer: Someone apparently having a seizure
People who thought others were listening were slower to report the emergency.

Bystander Effect Quiz – Why Crowds Sometimes Freeze

The bystander effect describes how the presence of other people can make each individual less likely to help in an emergency. It became famous after reports about the 1964 murder of Kitty Genovese in New York, though the 38 witnesses story was later shown to be exaggerated.

John Darley and Bibb Latané tested it in 1968 with smoke-filled rooms and staged seizures over an intercom. They identified diffusion of responsibility and pluralistic ignorance as causes. A 1973 study found people in a hurry were less likely to help.

A 2019 study of real CCTV footage found that someone helped in about nine of ten public conflicts, so groups often do act. Giving a specific person a clear task is a simple way to overcome bystander hesitation.

What This Quiz Teaches

Psychology students and curious readers will enjoy these questions.

What the effect is
Which case sparked research
What experiments showed
Why people hesitate
How to get help faster

Did You Know?

First aid training makes people more likely to help.
Darley and Latané proposed a five-step model of helping.
Online bystanders show similar effects.
Clear emergencies get more help than ambiguous ones.
Kitty Genovese's case is still taught in psychology courses.