The Addenbrooke's Cognitive Examination III is one of the most widely used tests to assess cognitive impairment. Although previous studies have shown adequate levels of diagnostic utility to detect severe impairment, it has not shown sensitivity to detect mild decline. The aim of this study was to evaluate the psychometric properties of Addenbrooke's Cognitive Examination III in a large sample of elderly people through Item Response Theory, due to the lack of studies using this approach. A cross-sectional study was conducted with 1164 people from the age of 60 upwards, of which 63 had a prior diagnosis of Alzheimer dementia. The results showed that, globally, the Addenbrooke's Cognitive Examination III possesses adequate psychometrics properties. Furthermore, the information function test shows that the subscales have different sensitivity to different levels of impairment. These results can contribute to determining patterns of cognitive deterioration for the adequate detection of different levels of dementia. An optimized version is suggested which may be an economic alternative in the applied field.

中文翻译：

---

Addenbrooke 认知考试 III (ACE-III) 的心理测量特性：项目反应理论方法。

Addenbrooke 认知检查 III 是评估认知障碍的最广泛使用的测试之一。尽管以前的研究已经显示出足够水平的诊断效用来检测严重损伤，但它没有显示出检测轻度下降的敏感性。由于缺乏使用这种方法的研究，本研究的目的是通过项目反应理论在大量老年人样本中评估 Addenbrooke 认知考试 III 的心理测量特性。对 1164 名 60 岁以上的人进行了一项横断面研究，其中 63 人之前被诊断为阿尔茨海默氏痴呆症。结果表明，在全球范围内，Addenbrooke 的认知考试 III 具有足够的心理测量学特性。此外，信息功能检验表明，各分量表对不同程度的损伤具有不同的敏感性。这些结果有助于确定认知恶化的模式，以便充分检测不同程度的痴呆症。建议优化版本，这可能是应用领域的经济替代方案。