某高等医学院校大学生临床技能竞赛的教育测量学指标评价

The evaluation of educational measurement indexes from the Undergraduates Clinical Skills Competition in a medical university

目的分析评价某高等医学院校大学生临床技能竞赛的教育测量学指标，探讨比赛的合理性。方法以参加中国医科大学第二届大学生临床技能竞赛的84名学生成绩为研究对象，根据教育测量学原理，计算试题的难度、区分度，比赛的信度和效标关联效度。难度的计算选用主观题难度计算公式，除难度以外的指标均采用SPSS17．0进行分析。结果该校第二届大学生临床技能竞赛试题的平均难度为0．61，平均区分度0．77，总体信度0．926，以OSCE成绩做效标测量出的效标关联效度为0．416。结论本次该校大学生临床技能竞赛具有良好的信度、区分度和效标关联效度：而作为选拔性比赛，难度可在兼顾出题范围的同时进一步提高。

Objective The purpose of this study was to analyze and evaluate the educational measurement indexes from the undergraduates clinical skills competition in a medical university. The rationality of the competition was discussed in the view of education survey. Methods 84 students＇ results which selected from the China Medical University 2nd Clinical Skills Competition were the research objects in this study. The indexes of the difficulty, discrimination, reliability and criterion-related validity of the competition were evaluated based on the Education surveying principle. The difficulty was calculated by subjective topic difficulty computing formula, and other indexes were carried out with SPSS 18.0 except the difficulty index. Results The average difficulty of the questions of this university was 0.61, the average discrimination was 0.77 and the overall reliability was 0.926. The OSCE scores of the participating students were taken as the criterion in this study. The calculated criterion-related validity was 0.416. Conclusion The college students＇ clinical skills competition has good reliability, discrimination and effective criterion-related validity. For the selective competition, the difficulty can be further improved while considering the scope of the topic.