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21.
STEVEN R. BROWN 《Journal of Educational Measurement》1971,8(4):283-287
Arguments favoring free- over forced-distribution Q sorts have assumed that forcing leads to loss of important statistical information and interferes with interval properties, rendering Pearson's r inappropriate for analysis. Q sorts with identical item orderings but with varied distributions are shown to provide essentially the same correlations and factor structures when coefficients are computed using Spearman's rs, Kendall's τ, and Pearson's r, leading to the conclusion that the same results are obtained, despite distribution and whether interval or ordinal statistics are used. 相似文献
22.
ROBERT F. McMORRIS JAMES A. BROWN GERALD W. SNYDER ROBERT M. PRUZEK 《Journal of Educational Measurement》1972,9(4):287-295
Two forms of a social studies achievement test were constructed with half the items for each form containing a cue, grammar, or length fault. Faults were found to make the items easier, which was supported by confidence intervals for the differences. However, validity coefficients with achievement and intelligence criteria, as well as the reliability coefficients, were virtually unchanged. The results agreed with those of Dunn and Goldstein (1959), even though the methodology differed. A suggested measure of test-wiseness for groups is presented. 相似文献
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