Bystander effect, a social psychological phenomenon wherein individuals do not offer help in an emergency when other people are present
Bystander effect (radiobiology), the phenomenon in which unirradiated cells exhibit irradiated effects as a result of signals received from nearby irradiated cells
This disambiguation page lists articles associated with the title Bystander. If an internal link led you here, you may wish to change the link to point directly to the intended article.