The Educational Testing Service (ETS) has recently released new estimates of the validities of the General Record Examination (GRE) for predicting cumulative graduate grade point average (GPA) [1]. They average in the middle thirties, and are thus roughly twice as high as those previously reported by independent investigators. This Demonstration is based on an expanded version of a simulation study [2] on reported test-criterion validities of the GRE. It is shown in [2] that this unexpected finding can be traced to a flawed methodology that tends to inflate multiple correlation estimates, especially those of population values near zero. The data from [2] is plotted in this Demonstration. Definitions for the acronyms: POP: population correlations BIAS: bias in sample estimates, defined as population parameter-sample estimate AGR: pooling scores: computing correlations after aggregating scores of smaller samples into larger samples PDA: pooled department analysis: averaging correlations of each of the subsamples SSS: subsample size


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