Individuals who are cunning and manipulative pathological liars would be unlikely to respond truthfully on a self-report measure of personality.Hare's PCL-R is an instrument that measures the characteristics of psychopathy.What does Hare's PCL-R use?

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Hare's PCL-R uses interviews with the client along with material from institutional files and people close to the person to measure the characteristics of psychopathy. This is because individuals with psychopathy often have a tendency to deceive and manipulate, making self-report measures unreliable. Behavioral observation in the person's natural environment, projective tests, and lie detector equipment are not typically used in the PCL-R.

Individuals Who Are Cunning and Manipulative Pathological Liars Would Be