用多面拉斯奇测量法检测物理论文项目中评分者的随机性效应

Adeosun P. K., Ekwere N. S.
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摘要

本研究试图利用多面拉斯奇测量法检测物理论文项目中评分者之间的随机性效应。本研究采用的研究设计是基于调查法的描述性研究设计。研究对象包括所有地方政府辖区内的八十八(88)所公立学校(物理学生人数为 3,642 人),以及乌约参议院辖区内所有高级中学(2022/2023 学年)的九十四(94)名物理教师。采用多阶段抽样技术对乌约参议院辖区内 31 所选定中学的三百六十四(364)名高中三年级物理学生和 37 名物理教师进行了有效抽样。本研究采用了多阶段抽样技术。用于数据收集的工具是物理成绩测验(PAT),该测验来自 WAEC 和 NECO 的 2020 年物理论文项目,信度系数分别为 0.91 和 0.90。研究结果表明,大多数评分者在给物理论文项目评分时都存在随机效应。研究还发现,在给物理论文项目评分时,评分者群体水平上的随机性效应存在显著差异,这意味着在给物理论文项目评分时,评分者之间不存在群体水平上的随机性效应。我们的结论是,评分者效应是成绩评分的差异来源,与评分者的行为有关,而与被评分者的实际成绩无关。我们建议,评分者应遵循评分指南,以减少评分中的随机性影响,并提供更准确、更客观的评价。
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Detecting Randomness Effect among Raters in Physics Essay Items using Many-Facet Rasch Measurement
This study sought to detect randomness effects among raters in physics essay items using Many-Facet Rasch Measurement. The research design adopted for this study is descriptive research design based on survey method. The population of the study comprised eighty-eight (88) public schools in all the local government areas with a physics student population of 3,642 students and ninety-four (94) physics teachers in all the Senior Secondary Schools in Uyo Senatorial District for the 2022/2023 academic session. Three hundred and sixty-four (364) SSS3 physics students and 37 physics teachers from the 31 selected secondary schools in Uyo Senatorial District were sampled using multistage sampling technique for effective selection. The multi-stage sampling technique was adopted for the study. The instrument used for data collection was Physics Achievement Test (PAT) obtained from WAEC and NECO 2020 Physics Essay items with reliability coefficients of 0.91 and 0.90 respectively. The finding revealed that most of the individual raters commit randomness effect when rating physics essay Items. It also revealed there is a significant difference at the rater's group level exhibiting randomness effect when rating physics essay items, which implies that there is no group-level randomness effect present among raters when rating physics essay items. We concluded that rater effects are sources of variance in performance ratings that are associated with the raters' behaviour and not the actual performance of the ratee. It was recommended that raters should follow the rating guidelines to reduce the impact of randomness in their ratings and provide more accurate and objective evaluations.
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