Retest reliability method can be applied to measure the reliability. Also, poor reliability degrades the level of precision. If reliability is poor, it is hard to track the changes in the measurements. If similar outcome is resulted at all the attempts, then the measurements are reliable. We can draw a conclusion about the reliability by taking the same measurement using the same conditions few times. This measures the consistency of the measurements taken from an instrument or an experimenter. Reliability refers to the reproducibility of a measurement.
Reliability and validity are two important aspects of precision and accuracy. Also to minimize the error of the experimenter we can use several people and repeat the same experiment few times. Normally an expert would take the measurements. Not only the equipment but the person who takes the measurement is also of very importance. Another way is to use calibrated equipments and equipments with less error. In other words, this is known as increasing sample size. One is to increase the number of data, so that the error will be minimized. In order to increase the precision of the measurements, we use different tactics. If the data are not précised, then the outcome or the conclusion we make from those data aren’t going to be valid.
When taking measurements especially in scientific studies we have to ensure the precision of the data.
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