Peter Hatemi

Dr. Peter Hatemi, a professor at Penn State, stated that conservatives express more Psychoticism, which he defined as " uncooperative, hostile, troublesome, and socially withdrawn, but lack feelings of inferiority and have an absence of anxiety. At the extremes, those scoring high on P are manipulative, tough-minded, and practical." He also claims that the counterparts of these conservatives [the left] is more likely to be altruistic, well socialized, empathic, and conventional.
Source(s): http://reason.com/blog/2016/06/10/liberals-not-conservatives-express-morehttp://dailycaller.com/2016/06/08/oops-we-meant-liberals-paper-that-tied-conservatives-to-psychotic-traits-gets-stunning-official-correction/