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首页> 外文期刊>Journal of applied measurement >The Effect of Interactions between Item Discrimination and Item Difficulty on Fit Statistics
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The Effect of Interactions between Item Discrimination and Item Difficulty on Fit Statistics

机译：物品歧视与项目难度之间的相互作用对拟合统计数据的影响

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摘要

Residual-based fit statistics are among the most common indicators of fit to the Rasch model. There is considerable discussion in the literature of the efficacy of item fit statistics in detecting measurement disturbances. However, to date there has been no investigation of whether these fit statistics are robust to interactions between item discrimination and item difficulty. This study uses simulations to investigate whether interaction effects occur for fit statistics commonly used with the Rasch model. It is found that when the parameters are estimated with the Rasch model, the values of certain item fit statistics vary depending on the interaction between location and discrimination. Specifically, in the study, OUTFIT MNSQ and INFIT MNSQ provide a relatively consistent index of item discrimination across a range of item difficulties, whereas the t-statistic and the log transformed fit residual vary in a systematic fashion that depends on item location.
机译：基于残留的拟合统计数据是最常见的符合Rasch模型的指标之一。项目拟合统计验证检测测量干扰效果的文献中存在相当大的讨论。然而，迄今为止，没有调查这些拟合统计是否适合物品歧视和物品难度之间的相互作用。本研究使用模拟来调查是否对常用rasch模型使用的拟合统计来进行交互效应。结果发现，当使用RASCH模型估计参数时，某些项目拟合统计的值根据位置和辨别之间的相互作用而变化。具体地，在研究中，Outfit MNSQ和Infit MNSQ在一系列项目困难中提供了相对一致的物品歧视指标，而T型统计和日志转换的适合剩余差异在于依赖于物品位置。

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