![]() ![]() Reliability refers to the consistency of a measure. For example, a medical thermometer is a reliable tool that would measure the correct temperature each time it is used. You can also think of it as the ability for a test or research findings to be repeatable. ![]() ![]() What is Reliability? Reliability is a measure of the stability or consistency of test scores. The central assumption of reliability theory is that measurement errors are essentially random. The goal of reliability theory is to estimate errors in measurement and to suggest ways of improving tests so that errors are minimized. A test score could have high reliability and be valid for one purpose, but not for another purpose. … Reliability is a very important piece of validity evidence. Reliability refers to the degree to which scores from a particular test are consistent from one use of the test to the next. What does reliability mean and why is it important? … If a test is reliable it should show a high positive correlation. For example, if a person weighs themselves during the course of a day they would expect to see a similar reading. The term reliability in psychological research refers to the consistency of a research study or measuring test. ![]()
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