AP Psychology Exam Prep

Answer: A - The bystander effect states that people are much less likely to offer needed help when they are in a group than when they are alone.
Key Takeaway: The bystander effect states that people are less helpful when they are one of many in a group than when they are alone. For example, if someone passes out on the street and they are a part of a group, they are much less likely to offer help. The explanation for this behavior is that the sense of responsibility for offering help is divided amongst the group. This means that a person is likely to feel solely responsible and then act on it.