An objective professional examination in medicine and three relatively “pure” tests of reasoning were administered to a key development group of 88 medical interns and a cross-validation group of 83 interns. Results suggest that professional examination items involving reasoning can be identified by a physician or by item-analysis against reasoning tests. Judgmentally identified items correlated .35 to .49 with general and deductive reasoning; items identified by item-analysis correlated on cross-validation, .37 to .46 with these reasoning factors. (Spearman-Brown estimates were in the .50-.70 range.)
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