The PCL-R is an instrument that measures a distinct group of psychologically abnormal offenders using a three-point rating scale for twenty-two consistent behavioral characteristics. These characteristics have been underlying themes in an ongoing debate among psychiatrists over the definition and existence of psychopaths in discourse. Although the literature does not take a definitive position, the psychopath has nevertheless become a distinct group in the binding legislation of the Mental Health Act of 1913. The PCL-R goes a step further than the law to identify this group by not only suggesting that the “psychopath ” is a statistically significant group of criminals, but Hare takes an objective approach that eliminates any likelihood that mental health professionals and legal professionals will. use this concept as a waste bin for socially deviant crimes in the future. The Psychopathy Checklist Revised (PCL-R) measures twenty-two behavioral characteristics or lack thereof that have previously been identified as defining characteristics of a psychopath by Cleckley as well as other influential clinicians. The hare measures these characteristics on a three-point scale ranging from 0 to 1. Factors are also used to group thematically similar behaviors. For example, people prone to boredom, who share a lack of realistic long-term plans, live a parasitic lifestyle, and act on impulse, were grouped into Factor 1. Factor 2 measures those people with a lack of remorse guilt, inability to accept responsibility for one's actions, lack of sincerity/cheating, self-centeredness, superficiality/superficial charm, drug or alcohol abuse that is not the direct cause of the antisocial behavior, and insensitivity or lack of empathy. Factor 3 co...... half of the document ......ed on the statistical variance. In today's scientific world Hare is not wrong in wanting to establish an empirically meaningful and testable tool. Therefore, it is the specificity of the PCL-R that makes it such an effective tool. Compared to the Mental Health Act of 1913, the clinician can now receive a much clearer description of the psychopathic condition. A condition that we know exists based on an objective and universally consistent description of Hare's main behavioral characteristics. Thanks to Hare's research, the definition of this psychologically diverse group has gone from unclear to empirically relevant. The PCL-R is the most effective tool for diagnosing a psychopathic disorder. With clear, concise and impartial confidence, the PCL-R eliminates any opportunity for the term psychopath to be used as a waste bin for the misunderstood everyday deviant..