“…Firstly, in relation to psychopathy, both in clinical and community samples, this trait has shown to be much stronger in men than in women (e.g., Cale & Lilienfeld, 2002, Nicholls, Ogloff, Brink, & Spidel, 2005. Secondly, although there are few studies analysing the relationship between Machiavellianism and gender, these have also shown higher scores for men than women (e.g., Krampen, Effertz, Jostock, & Müller, 1990). Finally, through a meta-analysis in which 355 studies were included, Grijalva et al (2015) found that men scored higher than women on narcissism.…”