![]() If the forms are parallel, then the tests produce the same observed results. One specific type is parallel forms reliability, where two equivalent tests are given to students a short time apart. A test for depression should be able to detect depression in different age groups, for people in different socio-economic statuses, or introverts. For example, a claim that individual tutoring improves test scores should apply to more than one subject (e.g. External reliability means that your test or measure can be generalized beyond what you’re using it for. Internal reliability, or internal consistency, is a measure of how well your test is actually measuring what you want it to measure. Cronbach’s alpha: measures internal reliability for tests with multiple possible answers. ![]() ![]() Kuder-Richardson 20: a measure of internal reliability for a binary test (i.e.There are many statistical tools you can use to measure reliability. Of course, it’s not quite as simple as saying you think a test is reliable.
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