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Reliability
Reliability refers to the degree to which an assessment tool produces stable and consistent results over time.
Validity
The extent to which a test, instrument, or procedure actually measures what it is intended to measure, reflecting the accuracy of the results.
Regression
A return to an earlier or less advanced state or form of behavior, often as a defense mechanism in psychology.
Content Validity
The extent to which a test measures all aspects of the concept it intends to measure.
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