A scientific trial ran by the government in the fictional
book/film "A Clockwork
Orange" which attempts to reform criminal Alex DeLarge into a functioning member of society.
It entails forcing criminals to watch videos of horrific acts such as
rape and murder (both of which Alex participated in prior to his arrest) with drugs which make him feel sick. The scientists in the story believed, correctly according to the
book, that this would make the criminal feel sickened by the acts after the treatment was over.
It has various side effects (such as sickness when exposed to the
music of the videos) and was criticised by the narrative as it doesn't change the criminal's desires, just their potential to act.