The extent to which the results can be reproduced when the research is repeated under the same conditions. Failing to do so can lead to several types of research bias and seriously affect your work. It’s important to consider reliability and validity when you are creating your research design, planning your methods, and writing up your results, especially in quantitative research.

Reliability is about the consistency of a measure, and validity is about the accuracy of a measure.opt They indicate how well a method, technique. Reliability and validity are concepts used to evaluate the quality of research. Validity in Research | Difference, Types and Examples

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