Abstract
Little research has examined age differences by using more than one source of information. We compared age differences in Five-Factor Model (FFM) facets and nuances in self-reports and ratings by knowledgeable informants usingsamples from three countries (Estonia, Germany, and the Czech Republic;N = 5,624). We hypothesized that age differences would be larger in self- than informant-reports, because of greatersocialdesirability inself-descriptions with advancingage. Indeed, we foundthat age differences were systematically smaller in informant-reportscompared to self-reports;this trend was stronger for traits independently rated as socially desirable. As age differencesmay be best approximated by average trends of self- and informant-reports, we provide meta-analytic age trends for multi-rater composite scores of the FFMfacetsand nuances.
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