This is where several independent judges score a particular test, and compare their results. There’s no point having an assessment that measures certain traits unevenly throughout! Inter-Rater Reliability That’s what ‘internal consistency reliability’ measures. They’ll give both tests to the same people, on the same day, and check for similar results.īecause most tests aim to measure certain traits multiple times, it’s important that they do this consistently across different items.They’ll randomly split the pool into two different psychometric tests.questions, or tasks in the case of our behaviour-based assessment) Testers pool lots of test ‘items’ together (e.g.This is when you compare two different psychometric assessments, each based on the same content. As you can imagine, if the results vary wildly, then the assessment isn’t hugely consistent or reliable. This is where you get someone to take a test twice in quick succession, and see similar results both times. There are quite a few different ways to test the reliability of a psychometric assessment, each offering a different ‘type’ of reliability: Test-Retest Reliability While it’s a pretty simple concept in theory, it’s tougher to measure in practice. When we say an assessment is “reliable”, it means that we know it will measure the same thing consistently.
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