A solution is offered to problems associated with the inequality in the manipulability of probabilities of classification errors of masters versus nonmasters, based on competency test results. Eschewing the typical arbitrary establishment of observed-score standards below 100 percent, the solution incorporates a self-correction of wrong answers.…

Although arbitrary, whenever multiple judgmental standard-setting procedures are utilized by different groups concurrently, stability across raters can be achieved and decisions can be made in a relatively judicious manner. Greater stability across methods (Ebel, Nedelsky, Angoff) may be effected by slightly modifying the Ebel approach. (Author/PN)

The impact of overall test length and difficulty on the expert judgments of item performance by the Nedelsky method were studied. Five university-level instructors predicting the performance of minimally competent candidates on a mathematics examination were fairly consistent in their assessments regardless of length or difficulty of the test.…