TWO CRITERIA FOR GOOD MEASUREMENTS IN RESEARCH: VALIDITY AND RELIABILITY

TLDR

Reliability and validity are fundamental features for evaluating measurement instruments, with validity referring to what an instrument measures and how accurately, and reliability referring to the consistency of data and control of random error. The study aims to discuss and review the validity and reliability of measurement instruments, including threats to these properties. The authors review reliability and validity, examining threats to these properties in detail.

Abstract

Reliability and validity are two most important and fundamental features in the evaluation of any measurement instrument or toll 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 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.