Researchers use the concept of reliability to check how consistent the findings are for a given study when performed under the same controlled conditions repeatedly using the same methodology. In this case, though the measurement is reliable as it would read the same pressure every time, it is not valid as the correct atmospheric pressure is not read. For example:Ī barometer reads the atmospheric pressure 10 bars higher than the actual value. For instance, it is possible that measurement is valid but not reliable or is reliable but not valid. Reliability and validity, though closely related, are independent of one other. Due to this, researchers account for error when planning research designs and methods to attain as much reliability and validity as possible. The scientific community uses these two concepts to get a fair estimate of how effective the research process has been in gathering correct results of a scientific study.Įrror is ever present, so perfect reliability and validity are not achievable. To measure the quality of an experiment, researchers use two concepts: reliability and validity. The usefulness of a research study in any field depends upon the quality of both the methods applied and the results produced.
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