![]() If the same result can be obtained consistently using the same methods under the same circumstances, the measurement is considered reliable. What is reliability?Īccording to Russ-Eft (1980), reliability refers to the constancy with which a method measures something. However, if a measurement is valid, it is usually also reliable. A measurement can be reliable without being valid. Reliability and validity are closely related, but they mean different things. It is important to consider reliability and validity when creating research design, planning methods, and writing results, especially in quantitative research. Reliability refers to the consistency of a measure, and validity to the accuracy of a measure. They indicate how well a method, technique, or test measures something. Reliability and validity are concepts used to assess the quality of research.
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