Controlling the Minimum Item Exposure Rate in Computerized Adaptive Testing: A Two-Stage Sympson–Hetter Procedure

IF 1 4区 心理学 Q4 PSYCHOLOGY, MATHEMATICAL
Hsiu-Yi Chao, Jyun-Hong Chen
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引用次数: 0

Abstract

Computerized adaptive testing (CAT) can improve test efficiency, but it also causes the problem of unbalanced item usage within a pool. The effect of uneven item exposure rates can not only induce a test security problem due to overexposed items but also raise economic concerns about item pool development due to underexposed items. Therefore, this study proposes a two-stage Sympson–Hetter (TSH) method to enhance balanced item pool utilization by simultaneously controlling the minimum and maximum item exposure rates. The TSH method divides CAT into two stages. While the item exposure rates are controlled above a prespecified level (e.g., r min ) in the first stage to increase the exposure rates of the underexposed items, they are controlled below another prespecified level (e.g., r max ) in the second stage to prevent items from overexposure. To reduce the effect on trait estimation, TSH only administers a minimum sufficient number of underexposed items that are generally less discriminating in the first stage of CAT. The simulation study results indicate that the TSH method can effectively improve item pool usage without clearly compromising trait estimation precision in most conditions while maintaining the required level of test security.
计算机化自适应测验中控制最小项目曝光率:两阶段症状改善程序
计算机化自适应测试(CAT)可以提高测试效率,但也会导致池内项目使用不平衡的问题。不均匀的项目暴露率不仅会导致过度暴露的测试安全问题,还会引起暴露不足的项目池开发的经济问题。因此,本研究提出一种两阶段的TSH (Sympson-Hetter)方法,通过同时控制最小和最大项目曝光率来提高平衡的项目池利用率。TSH法将CAT分为两个阶段。在第一阶段,为了增加曝光不足的项目的曝光率,项目的曝光率被控制在一个预先规定的水平(例如,r min)以上,而在第二阶段,项目的曝光率被控制在另一个预先规定的水平(例如,r max)以下,以防止项目过度曝光。为了减少对性状估计的影响,TSH只管理最小数量的暴露不足项目,这些项目在CAT的第一阶段通常不太区分。仿真研究结果表明,在大多数情况下,TSH方法可以有效地提高题库使用率,而不会明显影响特征估计精度,同时保持所需的测试安全水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
50
期刊介绍: Applied Psychological Measurement publishes empirical research on the application of techniques of psychological measurement to substantive problems in all areas of psychology and related disciplines.
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