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考试评分的主观性使评分者偏差成为口语考试关注的焦点。本研究以我校上海大学667位考生为样本,运用项目反应理论的Rasch模型和一致性及偏差分析方法,详细分析了英语计算机口语考试中6位评分者宽严度差异、自身一致性和在考生及考试项目维度上的偏差。研究结果显示,英语计算机口语考试中评分者存在显著宽严差异;评分者虽自身一致性较好,但3位评分者有集中趋势;评分者与考生的偏差呈时间漂移性;两位评分者在两个考试项目维度上发生显著偏差。
The Subjectivity of Test Scores Make Grants Deviation a Focus of Spoken Tests. Based on the sample of 667 candidates from Shanghai University and using the Rasch model and consistency and deviation analysis methods of project response theory, this study analyzes in detail the differences of wideness and strictness of 6 graders in computer spoken English test, Deviations in the dimensions of candidates and exams. The results show that there is a significant difference between English and computerized oral English test scorers. The scorers, though their consistency is better, have a concentration tendency among the three scorers. The deviation between the scorers and the examinees shows time drift. The two scorers Significant deviations occurred in the dimensions of both exams.