Boban Petrović

TL;DR: This paper conducted preregistered replications of 28 classic and contemporary published findings, with protocols that were peer reviewed in advance, to examine variation in effect magnitudes across samples and settings, and found that very little heterogeneity was attributable to the order in which the tasks were performed or whether the task were administered in lab versus online.

TL;DR: The concept of dark tetrad was introduced by as discussed by the authors, where the latent space of four personality traits (Machiavellianism, narcissism, psychopathy, and psychopathy) is explored and the singular second-order factor which represents the Dark Tetrad can be extracted.

TL;DR: Although the authors observed some variations across cultures, these 5 facets of kama muta are highly correlated in every sample, supporting the validity of the construct and the measure.

TL;DR: That higher country-level narcissism was more common in less developed countries, whereas sex differences in narcissism were larger in more developed societies, is more consistent with evolutionary than social role models.

TL;DR: Results imply that the H EXACO–PI–R provides largely comparable measurement of the HEXACO dimensions, although the lack of scalar invariance highlights the necessity for future research clarifying the interpretation of mean-level trait differences across countries.