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Direct linkLong, Michael A.; Berry, Kenneth J.; Mielke, Paul W., Jr. – Educational and Psychological Measurement, 2009
An exact permutation test is provided for the tetrachoric correlation coefficient. Comparisons with the conventional test employing Student's t distribution demonstrate the necessity of using the permutation approach for small sample sizes and/or disproportionate marginal frequency totals. (Contains 4 tables.)
Descriptors: Statistical Analysis, Correlation, Sample Size, Comparative Analysis
Peer reviewedBerry, Kenneth J.; Mielke, Paul W., Jr. – Educational and Psychological Measurement, 1997
Describes a FORTRAN software program that calculates the probability of an observed difference between agreement measures obtained from two independent sets of raters. An example illustrates the use of the DIFFER program in evaluating undergraduate essays. (Author/SLD)
Descriptors: Comparative Analysis, Computer Software, Evaluation Methods, Higher Education
