“…At present, research is conducted to examine the degree to which CU traits are stable personality characteristics (Frick & Moffitt, 2010; Frick, Stickle, Dandreaux, Farrell, & Kimonis, 2005) and if they can be influenced by the environment (Viding, Blair, Moffitt, & Plomin, 2005). Van der Helm, Stams, van der Stel, van Langen, and van der Laan (2012) argue that an open living group climate in youth prison, especially positive contact between staff and inmates (see also Listwan, 2013), a structured and safe environment and possibilities for personal development and growth, can stimulate empathy and subsequently reduction of CU traits (De Waal, Smith-Churchland, Pievani, & Parmigiani, 2014; Viding et al, 2005).…”