Objective Theory and research have emphasized the impact of life events on personality trait
change. In this article, we review prospective research on personality trait change in …

460 BUSS evolved solutions to the adaptive problems our species has faced over millions of
years. Because personality psychology is dedicated to studying human nature in all of its …

Where did we come from? What is our connection with other life forms? What are the
mechanisms of mind that define what it means to be a human being? Evolutionary …

The idea that individual differences in behavior and physiology can be partly understood by
linking them to a fast-slow continuum of life history strategies has become popular in the …

The Five Factor Model, which measures individual differences on extraversion,
agreeableness, conscientiousness, emotional stability, and openness to experience, is …

Mental disorders arise from neural and psychological mechanisms that have been built and
shaped by natural selection across our evolutionary history. Looking at psychopathology …

The existence of individual differences in personality can be puzzling from an evolutionary
perspective. This paper offers a general framework for addressing this puzzle by combining …

Social investment theory (SIT) proposes that the transition to parenthood triggers positive
personality trait change in early adulthood. Using data from a representative sample of first …

Childfree individuals choose not to have children, which makes them a distinctive group
from parents who have had children, not-yet-parents who plan to have children, and …

Highlights•Evolutionary forces that maintain genetic variance in traits can be inferred from
their genetic architecture and fitness correlates.•A substantial amount of new data on the …