Age differences in five personality domains across the life span

Area of Science:

• Psychology
• Developmental Psychology
• Personality Psychology

Background:

• Understanding age-related personality changes is crucial for developmental psychology.
• Previous studies often lack methodological rigor for comparing personality across age groups.
• The Five-Factor Personality Inventory (FFPI) is a key instrument for personality assessment.

Purpose of the Study:

• To investigate age differences in the five personality domains across the lifespan.
• To employ a methodologically rigorous approach for comparing personality structure and mean levels.
• To examine personality continuity and change in a large, representative Dutch sample.

Main Methods:

• Cross-sectional study utilizing data from 2,494 Dutch participants (ages 16-91).
• Employed the Five-Factor Personality Inventory (FFPI) with 50 items.
• Strict measurement invariance testing and analysis of factor covariances and variances across age groups.

Main Results:

• Established structural continuity of personality across age groups.
• Confirmed equal factor variances across age groups, indicating consistent personality structure.
• Identified significant age differences in mean personality levels, with older adults being more agreeable and conscientious.

Conclusions:

• Personality structure demonstrates continuity throughout adulthood.
• Significant age-related increases in agreeableness and conscientiousness were observed.
• Both continuity and change characterize personality development across the lifespan.