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این شاخص توسط لاوشه () طراحی شده است.جهت محاسبه این شاخص از نظرات کارشناسان متخصص در زمینه محتوای آزمون مورد نظر استفاده می شود و با توضیح اهداف آزمون برای آن ها و ارائه تعاریف عملیاتی مربوط به محتوای سؤالات به آن ها، از آن ها خواسته می شود تا هریک از سؤالات را بر اساس طیف سه بخشی لیکرت «گویه ضروری است»، «گویه مفید است ولی ضروری نیست» و «گویه ضرورتی ندارد» طبقه بندی کنند.                             

بر اساس تعداد متخصصینی که سؤالات را مورد ارزیابی قرار داده اند، حداقل مقدار CVR قابل قبول بر اساس جدول زیر بایستی باشد. سؤالاتی مقدار CVR محاسبه شده برای آن ها کمتر از میزان مورد نظر با توجه به تعداد متخصصین ارزیابی کننده سؤال باشد، بایستی از آزمون کنار گذاشته شوند به علت اینکه بر اساس شاخص روایی محتوایی، روایی محتوایی قابل قبولی ندارند.

 

حداقل مقدار CVR قابل قبول بر اساس تعداد متخصصین نمره گذار

تعداد متخصصین

مقدار CVR

تعداد متخصصین

مقدار CVR

تعداد متخصصین

مقدار CVR

5

0/99

11

0/59

25

0/37

6

0/99

12

0/59

30

0/33

7

0/99

13

0/54

35

0/31

8

0/75

14

0/51

40

0/29

9

0/78

15

0/49

 

 

10

0/62

20

0/42

 

 




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