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Direct linkKane, Michael T.; Mroch, Andrew A. – Applied Measurement in Education, 2010
In evaluating the relationship between two measures across different groups (i.e., in evaluating "differential validity") it is necessary to examine differences in correlation coefficients and in regression lines. Ordinary least squares (OLS) regression is the standard method for fitting lines to data, but its criterion for optimal fit…
Descriptors: Least Squares Statistics, Regression (Statistics), Differences, Validity
