Is what communists
(although it has happened in other countries, including the U.S.
to a limited extent) give people who do not follow the party line
. It mainly involves a constant barrage of propaganda
- but has also been known to include forced labor
- in order to cause brainwashing
A good visual, although not necessarily realistic, depiction of reeducation can be found in Stanley Kubric's film "A Clock Work Orange."