EDUCATION UGC NET
SCHOOL AND CLASSROOM MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Validity
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Reliability
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Usability
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Objectivity
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Detailed explanation-1: -In psychometrics, the Kuder–Richardson formulas, first published in 1937, are a measure of internal consistency reliability for measures with dichotomous choices. They were developed by Kuder and Richardson.
Detailed explanation-2: -KR-20 scores range from 0-1 (although it is possible to obtain a negative score); 0 indicates no reliability and 1 represents perfect test reliability. A KR-20 score above 0.70 is generally considered to represent a reasonable level of internal consistency reliability.
Detailed explanation-3: -The Kuder and Richardson Formula 20 (KR20) is used to estimate the reliability of binary measurements, to see if the items within the tests obtained the same binary (right/wrong) results over a population of testing subjects.
Detailed explanation-4: -The formula for KR21 for scale score X is K/(K-1) * (1-U*(K-U)/(K*V)), where K is the number of items, U is the mean of X and V is the variance of X.
Detailed explanation-5: -Kuder Richardson 20 This statistic measures test reliability of inter-item consistency. A higher value indicates a strong relationship between items on the test.