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 using samples 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 greater social desirability in self-descriptions with advancing age. Indeed, we found that age differences were systematically smaller in informant-reports compared to self-reports; this trend was stronger for traits independently rated as socially desirable. As age differences may be best approximated by average trends of self- and informant-reports, we provide meta-analytic age trends for multi-rater composite scores of the FFM facets and nuances.

很少有研究通过使用不止一种信息来源来检验年龄差异。 我们使用来自三个国家（爱沙尼亚、德国和捷克共和国；N  = 5,624）的样本，比较了知识渊博的线人在自我报告和评分中的五因素模型 (FFM) 方面的年龄差异和细微差别。我们假设自我报告中的年龄差异会比线人报告中的更大，因为随着年龄的增长，自我描述中的社会期望更大。事实上，我们发现，与自我报告相比，线人报告中的年龄差异系统地更小；这种趋势对于独立评价为社会可取的特征更为强烈。由于年龄差异         可能最好通过自我报告和线人报告的平均趋势来近似，我们为FFM方面和细微差别的多评估者综合得分提供元分析年龄趋势。