This report introduces the methodology used by the wCorr R package for computing the Pearson, Spearman, polyserial, polyserial, polychoric and tetrachoric correlations, with and without weights applied. Simulation evidence is presented to show correctness of the methods, including an examination of the bias and consistency.
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The released EdSurvey Version 2.0 is designed for the analysis of national and international education data from the National Center for Education Statistics (NCES). EdSurvey gives users the ability to process and analyze these data efficiently, taking into account their complex sample survey design and the use of plausible values. EdSurvey is an R statistical package developed by AIR, tailored to the processing and analysis of NCES large-scale education data with appropriate procedures.