Personality traits in old age: measurement and rank-order stability and some mean-level change.

@article{Mttus2012PersonalityTI,
  title={Personality traits in old age: measurement and rank-order stability and some mean-level change.},
  author={Ren{\'e} M{\~o}ttus and Wendy Johnson and Ian J. Deary},
  journal={Psychology and aging},
  year={2012},
  volume={27 1},
  pages={
          243-249
        }
}
Lothian Birth Cohorts, 1936 and 1921 were used to study the longitudinal comparability of Five-Factor Model (McCrae & John, 1992) personality traits from ages 69 to 72 years and from ages 81 to 87 years, and cross-cohort comparability between ages 69 and 81 years. Personality was measured using the 50-item International Personality Item Pool (Goldberg, 1999). Satisfactory measurement invariance was established across time and cohorts. High rank-order stability was observed in both cohorts… 

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