Decalogue for the Factor Analysis of Test Items. BACKGROUND In the study of the psychometric properties of the items of a test, a fundamental aspect is the analysis of their dimensional structure. The objective of this work is to provide some guidelines that allow the factor analysis of the items to be carried out in a rigorous and systematic way. METHOD A review of the recent psychometric literature was carried out to identify the fundamental steps to be followed in order to carry out an adequate factor analysis of the items of a test. RESULTS Ten main recommendations were identified to carry out the factorial analysis of the items of a test: adequacy of the data and the sample, univariate statistics, justification of the analysis, selection of the analyzable items, type of model, most appropriate factorial solution, estimation of the parameters, adequacy of the factorial solution, substantive coherence of the model, and final version of the test. CONCLUSIONS If the ten recommendations proposed in the current psychometric literature are systematically followed, it will be possible to optimize the quality of the tests and the decision-making based on the estimates of the scores obtained through them. These recommendations should be useful to both researchers and practitioners.

中文翻译：

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[测试项目因素分析的十诫]。

测试项目因素分析的十诫。背景技术在研究测试项目的心理测量特性时，一个基本方面是分析它们的维度结构。这项工作的目的是提供一些指导方针，使项目的因素分析能够以严格和系统的方式进行。方法 对最近的心理测量学文献进行了回顾，以确定要遵循的基本步骤，以便对测试项目进行充分的因素分析。结果 确定了对测试项目进行因子分析的十项主要建议：数据和样本的充分性、单变量统计、分析的正当性、可分析项目的选择、模​​型类型、最合适的因子解决方案、参数的估计、阶乘解的充分性、模型的实质性一致性以及测试的最终版本。结论 如果系统地遵循当前心理测量学文献中提出的十项建议，就有可能根据通过它们获得的分数估计来优化测试质量和决策。这些建议应该对研究人员和从业者都有用。