Scientists may have uncovered a hidden brain difference that helps explain the thrill-seeking behavior of psychopaths. Credit: AI/ScienceDaily.com Neuroscientists have identified a measurable brain difference between people with psychopathic traits and those with few or none. In a study published in the Journal of Psychiatric Research , researchers from Nanyang Technological University, Singapore (NTU Singapore), the University of Pennsylvania, and California State University found that a brain