Social psychologists believe the bystander effect can apply to a number of everyday situations. For example,
on a busy sidewalk, you might not give money to a homeless man (or help someone who falls down). On crowded subway,
you may not give up your seat to an elderly person. On the highway, you
might choose not to stop and help someone change a flat thre. In these situations,
you---and because so many people are around to help, so no one ends up helping at all.