The effects of changing the deletion direction and deletion ratio on the validity and reliability of the C-test
- سال انتشار: 1388
- محل انتشار: دوفصلنامه آموزش زبان انگلیسی، دوره: 3، شماره: 1
- کد COI اختصاصی: JR_TELJ-3-1_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 271
نویسندگان
Shiraz University
Shiraz University
Shiraz University
چکیده
This study looks at the effects of changing the deletion direction and ratio on the validity and reliability of the C-test. For this purpose, a cluster sampling procedure was used to select ۳۲۴ English students with different levels of proficiency. The subjects were then randomly assigned to three experimental groups. Each group took a TOEFL test and a C-test version. The three C-test versions were all based on the same texts. Immediately after completing the C-test, subjects received a ten-item questionnaire about issues such as face validity, suitability, and possible functions of the C-test. The findings indicated that changing the deletion ratio from ۲ to ۳ can result in an easier C-test with a higher discrimination power and a better criterion-related validity. On the other hand, changing the deletion direction (from right to left) can result in a more difficult C-test with a lower discrimination power and a worse concurrent validity –a C-test which might be a completely different test that measures a different construct. However, the changes to the deletion technique probably do not result in any changes to the reliability.کلیدواژه ها
C-test, deletion direction, deletion ratio, Validity, Reliabilityاطلاعات بیشتر در مورد COI
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