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- W2403543026 abstract "number of subjects. Lord (1962) has described a procedure for estimating test norm distributions by use of the item sampling techniques. The specific purpose of his study was to determine if reliable estimates of a norms distribution for a 70-item multiple choice test could be made by administering a different sample of seven items to each of 10 examinee samples consisting of 100 subjects each as opposed to administering the 70 items to a sample of 100 subjects. Estimates of norm data were also obtained from each of the 10 examinee samples of 100 subjects each on the total 70-item test. Comparisons were made between the norm statistics (mean, standard deviation, and frequency distribution) and estimates of these same statistics derived from both the item samples and the examinee samples. The general findings of his study were that the item sample estimate of the mean was closer to the norms mean than were seven of the 10 examinee sample estimates. With regard to the variance, the item sample estimate was closer to the norm variance than were five of the 10 examinee sample estimates. The distribution of test scores derived from the item sample estimates tended also to approximate the distribution of scores in the norm group. In discussing the results of this work, Lord called attention to the fact that there was much need to test out his conclusion on other sets of data since he used only one item sample estimate. He also noted the results may have been affected by the fact that only two-thirds of the total number of items were used since sampling was done with replacement. Plumlee (1964) reported on the value of deriving test norms using the item sampling approach for the industrial personnel situation where the number of subjects was likely to be small (i.e., less than 1,000) as compared to the educational situation. Her procedure consisted of comparing the mean and standard deviation for a 30-item punctuation test taken by 200 clerical applicants with estimates of the same statistics obtained from administering three items to 10 groups" @default.
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- W2403543026 date "2016-01-01" @default.
- W2403543026 modified "2023-09-26" @default.
- W2403543026 title "ESTIMATING TEST NORMS FROM VARIABLE SIZE ITEM AND" @default.
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