Reliability of test scores
[DOC File]Reliability and validity
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The reliability of a test is the correlation between the population of values of the test at time 1 and the population of values at time 2 assuming constant true scores and no …
[DOC File]Reliability Analysis - Stanford
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What is test reliability? Test reliability indicates the degree to which a test yields consistent results. Statistical techniques determine reliability and help ensure that there would not be a radically different score if the student were to attempt the test a second time with no additional learning.
[DOC File]Reliability and Validity
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Weighting test scores by appropriateness of confidence has, almost without exception, raised the reliability of test scores. Chart 1 shows typical results, beginning with Kate Hevner's in 1932. The lower end of the arrows are the reliability estimates for the conventional scores, and the arrows indicate the increases produced by weighting the ...
[DOCX File]Reliability - University Homepage
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Test-retest reliability is the degree to which scores are consistent over time. It indicates score variation that occurs from testing session to testing session as a result of errors of measurement. Problems: Memory, Maturation, Learning.
Test Reliability—Basic Concepts
This yields two scores for each person and the correlation between these two sets of scores is the test-retest reliability coefficient. If the test is reliable, there will be a high positive association between the scores. Exercise: The scores of 20 students in language proficiency test and retest.
[DOC File]RELIABILITY, PREDICTIVE VALIDITY, AND PERSONALITY BIAS
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Reliability refers to the consistency or stability of a set of test scores. The reliability coefficient is a correlation coefficient that is used as an index of reliability. Unlike a regular correlation coefficient, the reliability coefficient has a range of 0 (no reliability) to 1 (perfect reliability). ...
[DOC File]Reliability
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Reliability means simply whether or not the scores of the same people stay the same from one measurement to the next, regardless of whether those scores represent the true amount of whatever the test is supposed to measure.
[DOC File]VALIDITY AND RELIABILITY - Purdue University
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Splitting a test into two halves, and comparing the scores in both halves If the results on the two tests are similar, we can assume the test is reliable Inter-Rater reliability The measure is administered to the same group of people twice If there is high agreement between the raters, the measure is reliable
[DOC File]Reliability
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Reliability is estimated using correlation coefficients (Pearson r) derived from various sets of test scores. Correlation coefficients range from 0.00 (no correlation) to 1.00 (perfect correlation). Professionally developed standardized tests often have reliability coefficients of .90 or higher, while teacher-made tests often have coefficients ...
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