文章基本信息

标题：On the Statistical and Heuristic Difficulty Estimates of a High Stakes Test in Iran
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作者：Ali Darabi Bazvand ; Shiela Kheirzadeh ; Alireza Ahmadi 等
期刊名称：International Journal of Assessment Tools in Education
电子版ISSN：2148-7456
出版年度：2019
卷号：6
期号：3
页码：330-343
DOI：10.21449/ijate.546709
语种：English
出版社：International Journal of Assessment Tools in Education
摘要：The findings of previous research into the compatibility of stakeholders’ perceptions with statistical estimations of item difficulty are not seemingly consistent.Furthermore,most research shows that teachers’ estimation of item difficulty is not reliable since they tend to overestimate the difficulty of easy items and underestimate the difficulty of difficult items.Therefore,the present study aims to analyze a high stakes test in terms of heuristic (test takers’ standpoint) and statistical difficulty (CTT and IRT) and investigate the extent to which the findings from the two perspectives converge.Results indicate that,1) the whole test along with its sub-tests is difficult which might lead to test invalidity;2) the respondents’ ratings of the total test in terms of difficulty level are almost convergent with the difficulty values indicated by IRT and CTT,except for the two subtests where students underestimated the difficulty values,and 3) CTT difficulty estimates are convergent with IRT difficulty estimates.Therefore,it can be concluded that students’ perceptions of item difficulty might be a better estimate of test difficulty and a combination of test takers’ perceptions and statistical difficulty might provide a better picture of item difficulty in assessment contexts.
关键词：Classical true score theory;Heuristic difficulty;High stakes test;Item response theory;Statistical difficulty