![]() ![]() In research, validity has two essential parts: internal and external. Keywords: Reliability, Validity, Consistent, estimates. Finally this article attempts to explore the measurement related concepts as well as some of the issues pertaining thereto. Secondly, the factors which are affecting the reliability and validity of research are discussed. ![]() First, the meaning of reliability and validity of research are discussed. This article discusses the issues in validity and reliability of research. The challenges of achieving reliability and validity are among the most difficult faced by researchers. The use of reliability and validity are common in quantitative research and now it is reconsidered in the qualitative research paradigm.
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