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ERIC Number: ED078052
Record Type: RIE
Publication Date: 1973-Apr
Pages: 12
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
On Accuracy in Reliability Estimation.
Kristof, Walter
This study in parametric test theory deals with the statistics of reliability estimation when scores on two parts of a test follow a binormal distribution with equal (case 1) or unequal (case 2) expectations. In each case biased maximum-likelihood estimators of reliability are obtained and converted into unbiased estimators. Sampling distributions are derived. Second moments are obtained and utilized in calculating mean square errors of estimation as a measure of accuracy. A rank order of four estimators is established. There is a uniformly best estimator. Tables of absolute and relative accuracies are provided for various reliability parameters and sample sizes. (Author)
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: Educational Testing Service, Princeton, NJ.