The Functional Activities Questionnaire (FAQ) is a collateral-report measure of difficulties in activities of daily living. Despite its widespread use, psychometric analyses have been limited in scope, piecemeal across samples, and limited primarily to classical test theory. This article consolidated and expanded psychometric analyses using tools from generalizability and item response theories among 27,916 individuals from the National Alzheimer’s Coordinating Center database who completed the FAQ. Reliability was evaluated with internal consistency, test–retest, and generalizability analyses. Validity was assessed via convergence with neurocognitive measures, classification accuracy with impairment stage, and confirmatory factor and item response theory analyses. Demographics did not impact scores and there was strong evidence for reliability (0.52-0.95), though coefficients were attenuated when restricted in range to diagnostic groups (e.g., normal cognition). There were strong correlations with neurocognitive measures (rs: −.30 to −.59), strong classification accuracy (areas under the curve: .81-.99), and a single-factor model had excellent fit. All items evidenced strong item response theory discrimination and provided significant information regarding functional disability, albeit within a relatively restricted range. The FAQ is a reliable and valid measure of activities of daily living concerns for use in clinical/research settings. It best assesses mild levels of functional difficulty, which is helpful in distinguishing normal cognition from mild cognitive impairment and dementia.

功能活动问卷 (FAQ) 是衡量日常生活活动困难的附带报告。尽管它被广泛使用，但心理测量分析的范围有限，样本零散，主要局限于经典测试理论。本文使用来自国家阿尔茨海默病协调中心数据库的 27,916 名完成常见问题解答的个人的普遍性和项目反应理论工具，巩固和扩展了心理测量分析。可靠性通过内部一致性、重测和普遍性分析进行评估。通过与神经认知测量的融合、损伤阶段的分类准确性以及验证因素和项目反应理论分析来评估有效性。人口统计学不会影响分数，并且有强有力的证据表明可靠性 (0. 52-0.95），尽管当限制在诊断组（例如，正常认知）的范围内时，系数会衰减。与神经认知测量有很强的相关性（r s：−.30 至 −.59），分类准确度高（曲线下面积：.81-.99），单因素模型具有出色的拟合度。所有项目都证明了强烈的项目反应理论歧视，并提供了有关功能障碍的重要信息，尽管在相对有限的范围内。常见问题解答是用于临床/研究环境的日常生活活动的可靠且有效的衡量标准。它最好地评估轻度功能困难水平，这有助于区分正常认知与轻度认知障碍和痴呆。