Beiser David, Vu Milkie, Gibbons Robert
Dr. Beiser and Ms. Vu are with the Section of Emergency Medicine, and Dr. Gibbons is with the Center for Health Statistics, University of Chicago, Chicago. Send correspondence to Dr. Gibbons (e-mail:
Psychiatr Serv. 2016 Sep 1;67(9):1039-41. doi: 10.1176/appi.ps.201500304. Epub 2016 Apr 15.
Computerized adaptive testing (CAT) provides improved precision and decreased test burden compared with traditional, fixed-length tests. Concerns have been raised regarding reliability of CAT-based measurements because the items administered vary both between and within individuals over time. The study measured test-retest reliability of the CAT Depression Inventory (CAT-DI) for assessment of depression in a screening setting where most scores fall in the normal range.
A random sample of adults (N=101) at an academic emergency department (ED) was screened twice with the CAT-DI during their visit. Test-retest scores, bias, and reliability were assessed.
Fourteen percent of patients scored in the mild range for depression, 4% in the moderate range, and 3% in the severe range. Test-retest scores were without significant bias and had excellent reliability (r=.92).
The CAT-DI provided reliable screening results among ED patients. Concerns about whether changes in item presentation during repeat testing would affect test-retest reliability were not supported.
与传统的固定长度测试相比，计算机自适应测试（CAT）具有更高的精度和更低的测试负担。由于随着时间的推移，个体之间和个体内部所使用的测试项目存在差异，因此有人对基于CAT的测量的可靠性提出了担忧。本研究测量了CAT抑郁量表（CAT-DI）在筛查环境中评估抑郁的重测信度，该筛查环境中大多数分数落在正常范围内。
对某学术急诊科（ED）的成年患者（N = 101）进行随机抽样，在其就诊期间用CAT-DI进行两次筛查。评估重测分数、偏差和信度。
14%的患者抑郁得分处于轻度范围，4%处于中度范围，3%处于重度范围。重测分数无显著偏差，信度极佳（r = 0.92）。
CAT-DI在急诊科患者中提供了可靠的筛查结果。关于重复测试期间项目呈现的变化是否会影响重测信度的担忧未得到证实。
