Research Brief

The Personality Trait That Predicts How Long You'll Live

Abstract

Conscientiousness is the only Big Five trait consistently associated with longer lifespan, adding an average of 2-3 years of life.

Correlation Data

Positive Correlation

Consensus: Robust finding replicated across cultures. The Terman Life Cycle Study (Friedman & Martin, 2011) followed participants for 80 years.

Variable Y: Longevity

Variable X: High Conscientiousness

Biological Mechanism

Conscientious individuals engage in healthier behaviors (exercise, diet, sleep), avoid risky behaviors (smoking, substance abuse), and manage stress more effectively.

Scientific Explanation

The link operates through behavior: conscientious people follow medical advice, maintain healthy routines, wear seatbelts, and avoid excess. They also build stable social networks and financial security.

Real World Examples

Blue Zone populations share traits of conscientiousness: routine, purpose, moderate habits.

Advisory Protocol

Even if naturally low in conscientiousness, adopting specific health behaviors (regular sleep, moderate exercise) can capture much of the longevity benefit.

References & Literature

Friedman & Martin (2011)
Kern & Friedman (2008)
Bogg & Roberts (2004)

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