Do GRE scores help predict getting a physics Ph.D.? A comment on a paper by Miller et al
| Autor: | Michael B. Weissman |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Variance inflation factor
0303 health sciences Multidisciplinary biology 05 social sciences Null (mathematics) Rank (computer programming) Miller 050301 education Technical Comments Collinearity biology.organism_classification Technical Comment Confidence interval Stratification (mathematics) Scientific Community 03 medical and health sciences Research Methods Econometrics SciAdv t-comment Null hypothesis 0503 education 030304 developmental biology |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| DOI: | 10.1126/sciadv.aax3787 |
| Popis: | A Science Advances paper concluding that GREs do not predict who will get a physics Ph.D. has many statistical errors. A recent paper in Science Advances by Miller et al. concludes that Graduate Record Examinations (GREs) do not help predict whether physics graduate students will get Ph.D.’s. Here, I argue that the presented analyses reflect collider-like stratification bias, variance inflation by collinearity and range restriction, omission of parts of a needed correlation matrix, a peculiar choice of null hypothesis on subsamples, blurring the distinction between failure to reject a null and accepting a null, and an unusual procedure that inflates the confidence intervals in a figure. Release of results of a model that leaves out stratification by the rank of the graduate program would fix many of the problems. |
| Databáze: | OpenAIRE |
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