PETS-CAST的效度研究

Validity Research on PETS-CAST

为了检验PETS计算机自适应序列测试的效度,研究者选取了高二学生423人和大学英语系学生341人参加了PETS-CAST测试,同时使用问卷调查被试对该测试的感受。结果表明,该测试的信度和效度较好,能够对被试的英语水平进行比较准确的测量;但被试对计算机测试形式不够适应,与纸笔测试形式的感受不同。若要推出英语计算机自适应序列测试,尚须对计算机测试模式带来的影响以及如何完善测试系统进行进一步的研究。

423 students from high school and 341 students from university take the real PETS-CAST; a questionnaire on feeling of the computer testing is administered as well. Results show that PETS-CAST can measure and discriminate the test-takers precisely, but some students are not suitable in computer testing which perhaps influence the performance. Further work is needed to refine the measures that need to be improved on the development of PETS-CAST.