"For many years, our institution ran a therapeutic community program for violent offenders that was thought to be especially effective for psychopaths...

Among nonpsychopaths, there was a significant negative association between participation and violent recidivism, while among psychopaths the association was significantly positive. The data suggested that the ''treatment'' made the psychopaths more dangerous. Morever, even though they behaved much worse than nonpsychopaths during therapy, psychopaths were just as successful at convincing the clinicians to recommend them for discharge and to give them leadership roles in the program...

It seemed that both psychopaths and non-psychopaths in the therapeutic community learned how to perceive the feelings of others, take the perspective of others, and delay gratification, but the psychopaths used these new abilities to facilitate the manipulation and exploitation of others."

--- The Construct of Psychopathy, Grant T. Harris; Tracey A. Skilling; Marnie E. Rice (2001)