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[DOC File]Validity: To what degree are we truly measuring the ...
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Test Retest Reliability: How well does a measure give the same scores for the same people over time? If you were to take the same version of the GRE two times in a row, assuming that you did not study in between, the GRE would be thought to have high test retest reliability if your scores were very close to being the same.
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[DOC File]Reliability Analysis - Stanford University
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Test-retest reliability. The calculation of test-retest reliability is straightforward. The same test is administrated on two occasions to the same individuals under the same conditions. This yields two scores for each person and the correlation between these two sets of scores is the test-retest reliability coefficient.
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[DOC File]Reliability and Validity - stcmpsy
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Match the method of estimating reliability to the description (pg165) Test-Retest reliability If the measure depends upon interpretation of behaviour, we can compare the results from two or more raters. If the results in the two halves are similar, we can assume the test …
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[DOC File]Reliability and validity
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Test-Retest Method: Test-retest reliability is a measure of stability (Gronlund & Linn, 1990). For this method the test is administered twice to the same set of students. The correlation between students’ scores on the first test and scores on the second test is an estimate of reliability.
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[DOC File]VALIDITY AND RELIABILITY - Purdue University
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(Gay) Reliability is the degree to which a test consistently measures whatever it measures. Errors of measurement that affect reliability are random errors and errors of measurement that affect validity are systematic or constant errors. Test-retest, equivalent forms and split-half reliability are all determined through correlation.
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Test retest reliability example