![]() indicates score variation that occurs from one testing session to another. The more similar the scores on the test over time, the more stable or consistent are the scores. Stability ( also called Test – Retest Reliability) - the degree to which results/scores on the same test are consistent over time. no test is perfectly reliable and the scores are invariably affected by errors of measurements resulting from a variety of causes.If a test is perfectly reliable, the reliability coefficient is 1.0 meaning the score of the respondent perfectly reflected their true status with respect to the variable being measured. expressed numerically, usually as a coefficient ranging from 0.0 to 1.0 meaning the score of the respondent perfectly reflected their true status with respect to the variable being measured.concerns with the replicability and consistency of the methods, conditions and results (Wiersa and Jurs, 2005).the extent to which results are consistent over time and an accurate representation of the total population under study (Joppe 2000). ![]() ![]() the degree to which a test consistently measures whatever it measures and indicates the consistency of the scores produced (Raagas,2009). ![]()
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