【摘要】 计算机自适应测验(Computerized Adaptive Testing,CAT),是基于项目反应理论(IRT)建立题库,由计算机根据被试能力自动选择试题,最终对被试能力做出估计的一种新的测验形式。CAT因人选题,项目针对性强,用较少的题目较精确地估计被试的能力。CAT虽好,但不能盲目进行。从构思到使用,一个完整的CAT一般需要经历四个阶段:CAT可行性、适用性的考察研究,建设题库,确定CAT的算法及参数,投入使用和维护。每一阶段对CAT的有效性都至关重要。更多还原

【Abstract】 Computerized Adaptive Testing (CAT) is a new method that item bank is based on response theory (IRT), computer automatically selects items according to the ability of each examinee, and ultimately estimate precise ability of each examinee . The option of CAT’s item differs from person to person with a highly targeted, which estimates the ability of examinees by fewer subjects with a good accuracy. CAT is good, but can’t blindly used. From design to publish, generally go through four stages: feasibility and applicability studies, item bank development, CAT algorithm and parameters, publish and maintenance. The effectiveness of each stage of the CAT is essential.更多还原