There may be slight error here and there – you may notice that some readings differ by just a fraction of a gram – but overall the scale is reliable. A reliable scale will show the same reading over and over, no matter how many times you weigh the bowl. It’s an estimation of how much random error might be in the scores around the true score.įor example, you might try to weigh a bowl of flour on a kitchen scale. Reliability is a property of any measure, tool, test or sometimes of a whole experiment. In science, the idea is similar, but the definition is much narrower. We might talk of a football player as reliable, meaning that he gives a good performance game after game. ![]() ![]() In everyday language, we use the word reliable to mean that something is dependable and that it will give behave predictably every time.
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