The Adult Concentration Inventory (ACI) is an adult self-report measure of sluggish cognitive tempo (SCT) developed following a meta-analysis identifying items distinguishing SCT from attention-deficit/hyperactivity disorder (ADHD) inattention. To date, only one study conducted in college students has examined the structural and external validity of the ACI. The current study evaluated the convergent and discriminative validity of the ACI in a community sample of adults, in addition to testing unique associations with internalizing symptoms, daily life executive functions, and sleep. Adults (N = 286; M_age = 44.45; 83.6% female) completed ratings of SCT, ADHD symptom dimensions, and external correlates. An a priori two-factor model with cross-loadings found 10 of the 16 SCT items to have high loadings on the SCT factor and low loadings on the ADHD inattention factor. SCT was uniquely associated with higher internalizing symptoms, time management and self-organization difficulties, poorer sleep quality, shorter sleep duration, lower sleep efficiency, and more daytime sleepiness. These findings replicate and extend support for the ACI in assessing SCT in adults.

成人注意力量表 (ACI) 是在一项荟萃分析确定将 SCT 与注意力缺陷/多动障碍 (ADHD) 注意力不集中区分开来的项目后开发的对迟缓认知节奏 (SCT) 的成人自我报告测量。迄今为止，只有一项在大学生中进行的研究检查了 ACI 的结构和外部有效性。目前的研究评估了 ACI 在成人社区样本中的收敛和区分有效性，此外还测试了与内化症状、日常生活执行功能和睡眠的独特关联。成人 ( N = 286; M_年龄= 44.45; 83.6% 的女性）完成了 SCT、ADHD 症状维度和外部相关性的评分。具有交叉负载的先验双因素模型发现 16 个 SCT 项目中有 10 个在 SCT 因素上具有高负载，而在 ADHD 注意力不集中因素上具有低负载。SCT 与较高的内化症状、时间管理和自我组织困难、较差的睡眠质量、较短的睡眠时间、较低的睡眠效率和更多的白天嗜睡独特相关。这些发现复制并扩展了对 ACI 评估成人 SCT 的支持。