Life Events and Personality Trait Change: A Coordinated Data Analysis

Life events have been theorized to elicit personality trait changes. However, the empirical evidence for event-related personality development remains inconclusive. Even comprehensive reviews and meta-analyses are limited by the availability of effect sizes, the control for relevant confounders, and the examination of the temporal unfolding of effects. To overcome these limitations, we conducted a coordinated data analysis and examined event-related personality changes across seven large-scale panel studies (Ntotal = 196,256). Furthermore, we investigated corresponding event-related changes in life satisfaction and self-esteem as benchmarks for the interpretation of effect sizes. Integrating the results across panel studies, we found several consistent changes in the Big Five personality traits in response to life events. For example, new employment predicted increases in conscientiousness and emotional stability, whereas marriage predicted a decrease in openness. However, event-related changes in the Big Five personality traits were small (average bstd = 0.08), with effect sizes being similar to those of event-related changes in self-esteem but smaller than corresponding changes in life satisfaction. Building on these findings, future research should focus on the life events with replicable effects on personality development and examine how these life events lead to personality changes by examining associated changes in daily life.