Bruce Gross writes in the Forensic Examiner that Kanin's study is an example of the limitations of existing studies on false rape accusations. "Small sample sizes and non-representative samples preclude generalizability."  Philip . Rumney questions the reliability of Kanin's study stating that it "must be approached with caution". He argues that the study's most significant problem is Kanin's assumption "that police officers abided by departmental policy in only labeling as false those cases where the complainant admitted to fabrication. He does not consider that actual police practice, as other studies have shown, might have departed from guidelines." 
That’s why you train and practice and train and practice and train and practice. Buying a pistol, taking it to the range, and going through a couple of boxes of ammo is at best a familiarization with that particular weapon. My old SCA buddy who was an NCO with Delta under Charlie Beckwith, and who was on the Iran hostage rescue mission, used to say you hadn’t really learned to shoot a given pistol until the armorer had to replace the barrel for the first time. They would sometimes go through a couple thousand rounds per operator a week in training.
The interpersonal traits include glibness, superficial charm, a grandiose sense of self-worth, pathological lying, and the manipulation of others. The affective traits include a lack of remorse and/or guilt, shallow affect, a lack of empathy, and failure to accept responsibility. The lifestyle behaviors include stimulation-seeking behavior, impulsivity, irresponsibility, parasitic orientation, and a lack of realistic life goals. The anti-social behaviors include poor behavioral controls, early childhood behavior problems, juvenile delinquency, revocation of conditional release, and criminal versatility. The combination of these individual personality traits, interpersonal styles, and socially deviant lifestyles are the framework of psychopathy and can manifest themselves differently in individual psychopaths.