【作 者】：
关丹丹， 李 英
【关 键 词 】：
英语； 机考； 信度； 效度
【栏 目】：
学习环境与资源
【中文摘要】：
文章以PETS-5为例，在设计并实现机考形式后，选取出国培训班学生共404人参加了该机考测试。测试结束后，通过在线问卷调查的形式调查了被试对该机考形式的感受与意见，并收集了考生参加PETS-5纸笔考试的考试成绩。研究结果表明：（1）该机考总体的Alpha信度为0.82，各部分为0.63~0.65，具有较好的内部一致性信度；（2）该机考各部分的相关系数为0.34~0.43，与纸笔考试各部分相关的结果基本相近，具有较好的结构效度；（3）该机考成绩与纸笔考试成绩的相关系数为0.709，具有较好的效标关联效度；（4）该机考模式对于男生和女生是公平的，试题在性别上不存在项目功能差异；（5）关于测验总分及各部分性别差异t检验结果显示，男女考生仅在阅读理解成绩上存在性别差异，男生的平均成绩高于女生。
【英文摘要】：
In this study, PETS-5 computer-based English test is designed and implemented. A total of 404 students from overseas training class are selected to take the test. After the test, a questionnaire survey is conducted online to investigate the feelings and opinions of the participants towards the computer-based test. And the PETS-5 paper-pencil test scores of the examinees are collected. The results show that (1) the overall Alpha reliability of the computer-based test is 0.82, and the reliability of every section is 0.63-0.65, which indicate good internal consistency reliability. (2) The correlation among various sections is 0.34-0.43, similar to the results of each part of the paper-pencil test, which reveals good construct validity. (3) The correlation between the computer-based test scores and paper-pencil test scores is 0.709, which means good criterion-related validity. (4) The computer-based test is fair for males and females，and there is no gender DIF in the test. (5) The t-test results show that male and female candidates only have gender differences in reading comprehension scores, and the average score of the male is higher than that of the female.