bystander effect

Noun

 * 1)  The phenomenon that someone is less likely to help another if other potential helpers are present than otherwise.

Translations

 * Chinese:
 * Mandarin:
 * Esperanto:
 * French:
 * Japanese: 傍観者効果
 * Korean: 방관자효과
 * Thai:
 * Turkish: gözlemci etkisi
 * Vietnamese: hiệu ứng bàng quan, hội chứng Genovese