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Regardless of sample size, the degrees of freedom assigned to the single-sample t ratio must remain constant.
Test-retest Reliability
Test-retest reliability is a measure of consistency where the same test is administered to the same group of people at different times to assess the reliability over time.
Construct Validity
The extent to which a test or instrument accurately measures the theoretical, non-observable constructs it is designed to assess.
Predictive Validity
The degree to which a measurement or test score forecasts future results on a connected outcome.
Concurrent Validity
A measure of how well a particular test predicts outcomes based on comparison with other measures that are administered at the same time.
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