On the nature of intraindividual personality variability: reliability, validity, and associations with well-being |
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Authors: | Baird Brendan M Le Kimdy Lucas Richard E |
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Institution: | Department of Psychology, Michigan State University, East Lansing, MI 48824, USA. bairdbr1@msu.edu |
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Abstract: | Intraindividual personality variability is a construct that reflects the extent to which a person's self-reported personality changes over time or across social roles. Past studies have linked variability with important outcomes such as adjustment and well-being. However, existing variability measures conflate mean-level variance with true change over time, and thus these past findings are questionable. Three studies were conducted to examine the psychometric properties of existing variability indexes and to develop a new index that does not suffer from the problem of conflated variance. This new index is reliable and valid and can predict actual changes in self-reports over time. However, once mean-level variance is removed, intraindividual variability is no longer related to well-being. |
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