Collective responsibility in the form of collective punishment is often used as a disciplinary measure in closed institutions, e.g. boarding schools (punishing a whole class for the actions of one known or unknown pupil), military units, prisons (juvenile and adult), psychiatric facilities, etc. The effectiveness and severity of this measure may vary greatly, but it often breeds distrust and isolation among their members. Historically, collective punishment is a sign of authoritarian tendencies in the institution or its home society. For example, in the Soviet Gulags, all members of a "brigada" (work unit) were punished for bad performance of any of its members.