An individual can take the Myers–Briggs type indicator (MBTI) twice and end up with different results because the measure lacks test-retest reliability
Test-retest reliability is a metric of dependability that is acquired by giving the same test to a set of people twice over a period of time. The test's stability over time may then be assessed by correlating the results from Time 1 and Time 2.
Both the dynamic character of the construct being assessed across time and the length of time gap have an impact on the use of test-retest reliability. The mood is one psychological phenomenon that may alter quickly.
A typical evaluation might entail administering the same exam to individuals twice. External dependability is established if the same or comparable outcomes are achieved.
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