What personality scales measure: A new psychometrics and Its implications for theory and assessment

Robert R. McCrae, Rene Mottus

Research output: Contribution to journalArticlepeer-review

Abstract

Classical psychometrics held that scores on a personality measure were determined by the trait assessed and random measurement error. A new view proposes a much richer and more complex model, including trait variance at multiple levels of a hierarchy of traits and systematic biases shaped by the implicit personality theory of the respondent. The model has implications for the optimal length and content of scales, and for the use of scales intended to correct for evaluative bias, and suggests that personality assessments ought to supplement self-reports with informant ratings. The model also has implications for the very nature of personality traits.
Original languageEnglish
JournalCurrent Directions in Psychological Science
Early online date9 Jul 2019
DOIs
Publication statusE-pub ahead of print - 9 Jul 2019

Keywords

  • true score
  • method bias
  • implicit personality theory
  • five-factor model
  • reliability
  • informant ratings

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