Psychopathic Personality Traits Scale (23-item)
The 23-item Psychopathic Personality Traits Scale is a self-report scale that measures various elements of psychopathic (or sociopathic) personality. It also tests more generally for problems of self-regulation, which is closely related to psychopathy, and is based on the five-factor model of personality, showing that measures of self-regulation and self-control are rough proxies for psychopathy. The Psychopathic Personality Traits Scale was developed as part of a study to examine the genetic foundations to psychopathic personality traits. Its items were generated from a list of items from the International Personality Item Pool. The scale has good internal consistency, with a Cronbach's alpha of 0.82. Test items are scored on a scale from 1 to 5, where 1 = "strongly agree," 2 = "agree," 3 = "neither agree nor disagree," 4 = "disagree," to 5 = "strongly disagree." 14 items are reverse-coded so that higher scores represent higher levels of psychopathic personality traits.
Source
Beaver, Kevin M., Rowland, Meghan W., Schwartz, Joseph A., & Nedelec, Joseph L. (2011). The genetic origins of
psychopathic personality traits in adult males and females: Results from an adoption-based study. Journal of Criminal
Justice, Vol 39(5), 426-432. doi: 10.1016/j.jcrimjus.2011.07.002,