![]() If you weigh yourself every day and your weight is reasonably consistent, you consider the scale reliable. A test that is reliable or consistent has few variations within itself and produces similar results over time. The way to reduce random errors is to make a test consistent. Test reliability is an attempt to reduce the random errors that occur in all tests to a minimum. If you have trouble keeping all of these terms straight, think of it this way: reliability = consistency. A test with a high degree of reliability will be a more accurate measure of the learner’s knowledge and skills than one with low reliability. In this article, we’ll look at test reliability. You may want to read the previous article first. Test validity is required before reliability can be considered in any meaningful way. In Are Your Online Tests Valid?, we examined test validity or how you can be sure a test measures what it claims to measure. ![]() ![]() That’s why it’s so important to plan for online test reliability. After going through all the effort of developing an online test, you want it to be an accurate measure.
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