Questionnaire as the data collection tool is mostly used in social science research. The main purpose of tool is to obtain relevant data from the respondents for analysis. The study was conducted to assess the content validity, construct validity and reliability of the adapted job performance Questionnaire developed (Atta, 2012) and (Nigar, 2017). Content validity was assessed through expert opinion by using CVR formula construct validity was checked through exploratory factor analysis while reliability was evaluated by Cronbach alpha. The sample of the study consisted of 171 Instructors Physical education (IPEs) through simple random sampling technique, and data were analyzed through SPSS version 26. The study found that Job performance questionnaire has shown content validity, concurrent validity, and internal consistency among IPEs working in Government Higher Secondary Schools of Khyberpakhtunkhwa, Pakistan. Therefore, the study recommended for the use of this adapted questionnaire for measuring job performance among IPEs for future researchers.
Key words: Job Performance, Instructors Physical education (IPEs), Higher Secondary Schools
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