A review of psychopathic patients with the most severe form of ASPD challenge the belief that ASPD is treatable. In contrast, a case study with 44 patients found that “a broad range of treatments” with different levels of ASPD resulted in “an overall positive treatment effect”. A longer treatment, about four sessions a week and treatment lasting at least a year, can have significantly greater results. However, this review was criticized for using methods other than the PCL-R, using case studies, and recidivism not being an outcome measure (Meloy and Yakeley, 1995, p.1017).
