... difference measures, including the dark triad (Machiavellianism, narcissism, and psychopathy). Then, in both studies, participants had the opportunity to actually get tested for HIV. After analyzing data from Study 1, for Study 2 we preregistered the prediction that narcissistic participants would tend...

.../narcissistic rivalry will decrease over a period of two years in young adulthood. personality development maturity principle young adulthood mean-level change Dark Triad Machiavellianism, psychopathy, and narcissism are relevant in most areas of life due to their potential downsides for social...

..., provided the original author and source are credited. personality assessment dark tetrad dark triad psychopathy machiavellianism Machiavellianism (Mach), subclinical psychopathy, and subclinical narcissism are three interpersonally noxious and socially aversive personality traits...