Content validity index: A simple but significant approach in social science research

In this paper researchers tried to focus on a significant area for the development of research tool. Researchers endeavour to include content validity through the expert ratings in terms of quantitative way. During the assessment of any variables from social sciences or behavioural sciences researchers always try to develop a self-made questionnaire. If we want to standardised those tools, then we must have to measure objectivity, reliability, validity, etc of that particular research tool. Here the present researchers emphasised on the procedure of calculation of content validity in terms of Content Validity Index (CVI) of a self made questionnaire, which was used to measure pedagogical content knowledge (PCK) of Geography teachers. Content Validity Index (CVI) has been obtained for both item level content (I-CVI) as well as scale level content (S-CVI) also.