A reliable measurement is not always valid: the results might be reproducible, but they’re not necessarily correct. Reliability is about the consistency of a measure, and validity is about the accuracy of a measure. They indicate how well a method, technique or test measures something. Likewise, a measure can be valid but not reliable if it is measuring the right construct, but not doing so in a consistent manner. Can a test be reliable but not valid?Ī measure can be reliable but not valid, if it is measuring something very consistently but is consistently measuring the wrong construct. ![]() This means that while a person’s scores may vary slightly with age and environmental condition, they are repeatable and will generally agree with one another over time. IQ tests are a type of psychometric (person-centric) testing thought to have very high statistical reliability. 8 What is the difference between validity and reliability of test?Īre intelligence tests valid and reliable?.5 What will happen if the instrument is reliable but not valid?.4 What does it mean if a test is reliable and valid?. ![]()
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