What does the bystander effect state?
As the number of bystanders increases, the likelihood that any particular individual will intervene decreases.
As the number of bystanders decreases, the likelihood that any particular individual will intervene decreases.
As the number of bystanders increases, the likelihood that any particular individual will intervene increases.
It is impossible to determine whether any particular individual will intervene just by
looking at the number of bystanders present.