.../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...

... development. Many theories, such as social learning, attachment theory, and the psychological resources principle assume that parenting practices influence child personality development. Most of past research on the associations between parenting and child Big Five traits specifically has used cross-sectional...

... their association with personality development is not yet well explored. Individualists prioritize independence, personal freedom (from constraints placed by others), uniqueness, and self-determination. The relation with self-focus is clearest when these are further defined in terms of degree of hierarchy. Vertical...

...Jennifer Deventer; Sarah Humberg; Oliver Lüdtke; Gabriel Nagy; Jan Retelsdorf; Jenny Wagner; M. Brent Donnellan; M. Brent Donnellan Even though environmental contexts have been associated with personality development, little attention has been paid to individuals’ psychological perceptions thereof...