The use of violence would not limit the effectiveness. It would aggravate it, actually, enough to land you in prison for a long time with no bail.
I believe the answer is: the DSM-5.
the DSM-5 filled with standard classifications that professionals in psychological field can used to identify the type of illness that their patients have. With this classifications, we hoped that there would be less cases when different psychologists offered different conclusions and make the patients confused.
The government controlled agriculture through collective farms.
