Munich Personal RePEc Archive

Two Criteria for Good Measurements in Research: Validity and Reliability

Mohajan, Haradhan (2017): Two Criteria for Good Measurements in Research: Validity and Reliability. Published in: Annals of Spiru Haret University , Vol. 17, No. 4 (24 December 2017): pp. 56-82.

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Reliability and validity are the two most important and fundamental features in the evaluation of any measurement instrument or tool for a good research. The purpose of this research is to discuss the validity and reliability of measurement instruments that are used in research. Validity concerns what an instrument measures, and how well it does so. Reliability concerns the faith that one can have in the data obtained from the use of an instrument, that is, the degree to which any measuring tool controls for random error. An attempt has been taken here to review the reliability and validity, and threat to them in some details.

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