Birnbaum's three-parameter logistic item response model was used to study guessing behavior of low ability examinees on the Graduate Record Examinations (GRE) General Test, Verbal Measure. GRE scoring procedures had recently changed, from a scoring formula which corrected for guessing, to number-right scoring. The three-parameter theory was used…

A number of hypotheses were tested concerning elements of Graduate Record Examinations (GRE) items that might affect the performance of blacks and whites differently. These elements were characteristics common to several items that otherwise measured different concepts. Seven general hypotheses were tested in the form of sixteen specific…