Resnik Linda, Tian Feng, Ni Pengsheng, Jette Alan
Providence Department of Veterans Affairs Medical Center, Providence, RI, USA.
J Rehabil Res Dev. 2012;49(4):557-66. doi: 10.1682/jrrd.2011.04.0081.
The Community Reintegration of Injured Service Members (CRIS) measure consists of three scales measuring extent of, perceived limitations in, and satisfaction with community reintegration. Length of the CRIS may be a barrier to its widespread use. Using item response theory (IRT) and computer-adaptive test (CAT) methodologies, this study developed and evaluated a briefer community reintegration measure called the CRIS-CAT. Large item banks for each CRIS scale were constructed. A convenience sample of 517 Veterans responded to all items. Exploratory and confirmatory factor analyses (CFAs) were used to identify the dimensionality within each domain, and IRT methods were used to calibrate items. Accuracy and precision of CATs of different lengths were compared with the full-item bank, and data were examined for differential item functioning (DIF). CFAs supported unidimensionality of scales. Acceptable item fit statistics were found for final models. Accuracy of 10-, 15-, 20-, and variable-item CATs for all three scales was 0.88 or above. CAT precision increased with number of items administered and decreased at the upper ranges of each scale. Three items exhibited moderate DIF by sex. The CRIS-CAT demonstrated promising measurement properties and is recommended for use in community reintegration assessment.
受伤军人社区重新融入（CRIS）量表由三个分量表组成，分别测量社区重新融入的程度、感知到的限制以及满意度。CRIS的长度可能是其广泛应用的一个障碍。本研究运用项目反应理论（IRT）和计算机自适应测试（CAT）方法，开发并评估了一个更简短的社区重新融入量表，即CRIS-CAT。为每个CRIS分量表构建了大型项目库。517名退伍军人的便利样本对所有项目进行了回答。探索性和验证性因素分析（CFA）用于确定每个领域内的维度，IRT方法用于校准项目。将不同长度的CAT的准确性和精确性与完整项目库进行比较，并检查数据的项目功能差异（DIF）。CFA支持分量表的单维度性。最终模型的项目拟合统计量可接受。所有三个分量表的10项、15项、20项和可变项目CAT的准确性均在0.88及以上。CAT的精确性随着施测项目数量的增加而提高，在每个分量表的上限范围内则降低。有三个项目在性别上表现出中等程度的DIF。CRIS-CAT表现出了良好的测量特性，推荐用于社区重新融入评估。
