Answer:
Bystander effect
Explanation:
The bystander effect is the situation where a person in need help but other people discourage an individual from intervening in the situation of emergency. When the number of bystanders increased then fewer chances to help a person who is in need. The social psychologist named Bibbe Latane and Darley gives the concept of the bystander effect in 1964. It has been given when a 28-year-old girl has been murdered in her apartment and no one helped her due to the diffusion of responsibility and bystander effect.