What does the bystander effect describe?

• A. Increased likelihood of intervention in emergencies with a crowd
• B. Decreased likelihood of intervention in emergencies when others are present
• C. The influence of authoritative presence
• D. The effects of personal responsibility on helping behavior

Answer: (B)

The bystander effect refers to the phenomenon where individuals are less likely to offer help to a victim when other people are present. This decrease in the likelihood of intervention can be attributed to a few key psychological principles. One major factor is the diffusion of responsibility, where individuals assume that someone else will take action, thereby leading to inaction among the group. This effect has been demonstrated in numerous studies, showing that as the number of bystanders increases, the probability that any single person will help decreases.

In contrast, the other options don't accurately capture the essence of the bystander effect. For example, options discussing increased intervention or the influence of authority don't align with the established understanding of this social psychological phenomenon. The bystander effect specifically highlights how the presence of others can hinder, rather than promote, pro-social behavior, emphasizing the critical role of social dynamics in emergency situations.