stability and change of personality

Stability and Change of Personality Across the Life Course

Introduction

  • Research Question: Do personality traits change throughout life due to intrinsic maturation or major life experiences?

  • Study Objective: To analyze changes in mean levels and rank-order stability of the Big Five personality traits in a sample of 14,718 Germans across adulthood.

Key Findings from Study

  1. Age Influence on Mean Levels

    • Age has a complex curvilinear influence on mean personality levels.

    • Emotional Stability, Extraversion, Openness, and Agreeableness show inverted U-shaped correlation with age - peak stability between ages 40-60, decreasing thereafter.

    • Conscientiousness increases steadily throughout adulthood.

  2. Rank-Order Stability

    • Emotional Stability, Extraversion, Openness, and Agreeableness exhibit inverted U-shaped rank-order stability, while Conscientiousness has continuous increased stability.

  3. Personality and Major Life Events

    • Personality predicts occurrence of major life events (selection effects) and can change in reaction to these events (socialization effects).

    • Clustering events by valence (positive or negative) may overlook nuanced effects on personality change.

  4. Overall Change in Personality

    • Personality changes throughout life, with pronounced changes during young adulthood and old age, attributed partly to social demands and experiences.

Understanding Personality Traits

  • Personality Definition: Stable patterns in thoughts, feelings, and behavior that distinguish individuals (Roberts et al., 2008).

  • Despite stability, personality is subject to change across the life span.

Change Mechanisms in Personality

  • Types of Change

    • Mean-Level Change: Shifts in average levels of a trait across a population.

    • Rank-Order Change: Stability in individuals' positions relative to each other in terms of traits.

Age-Related Insights

  1. Stability and Age Hypotheses

    • Previous findings suggest stability increases until age 50 and remains stable thereafter (hard plaster hypothesis) but this may not hold true for all personality traits.

  2. Personality Changes with Age

    • Emotional Stability typically increases with age, while Agreeableness and Conscientiousness may show variability.

    • Extraversion appears to decline with age, especially in its social vitality aspects.

    • Openness trends differently, increasing in early adulthood, peaking, and then declining in old age.

Major Life Events Impact on Personality

  • Definition of Major Life Events: Normative transitions (e.g., marriage, first job) and significant individual experiences (e.g., bereavement).

  • Major experiences can significantly affect ones personality traits.

  • The impacts of events vary significantly based on age at which they occur and individual characteristics.

Methodological Considerations

  • Study Design: Longitudinal analysis leveraging a large and heterogeneous population sample to ensure robust findings.

  • Utilized the German Socio-Economic Panel (SOEP) data for reliable longitudinal analysis.

Conclusion

  • The study reinforces that personality undergoes changes not just due to age but also in response to experienced life events. There are systematic differences in how individuals experience these changes, and men and women may react differently to specific life events.

References

  • The research involved various studies establishing a link between personality development and life experiences, emphasizing the need for comprehensive models addressing personality change through the life span.