Participants with dark personality traits (Machiavellianism, narcissism, psychopathy) didn't feel like they needed to reduce them, while the others would have liked even a little more of them

Lighten the darkness: Personality interventions targeting agreeableness also reduce participants' levels of the dark triad. Nathan W. Hudson. Journal of Personality, March 14 2022. https://doi.org/10.1111/jopy.12714

Abstract

Objective: Previous research suggests that people want to change their big five traits—and moreover, they may be able to do so. This paper extends these findings in three ways. First, I examined the extent to which people want to change their levels of the dark triad—Machiavellianism, narcissism, and psychopathy. Second, I tested whether desires to change the dark triad predicted actual changes in the corresponding traits across approximately four months. Finally, participants received an intervention designed to change their big five personality traits. Consequently, I tested whether this intervention could also facilitate changes in the dark triad.

Method: The present study was a 16-wave, weekly, intensive longitudinal design (N = 467).

Results: Results revealed that participants generally did not want to change their levels of the dark triad. Nevertheless, individual variance in desires to change the dark triad did predict actual changes in the dark triad across four months. Moreover, interventions targeting agreeableness spurred changes in all three dark triad traits.

Conclusions: This research suggests that taking small steps to become more agreeable may also reduce individuals' levels of the dark triad. These findings may have implications for future research, as well as therapeutic treatments.