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Judge Consistency and Severity Across Grading Periods

1990; SAGE Publishing; Volume: 13; Issue: 4 Linguagem: Inglês

10.1177/016327879001300405

1552-3918

Mary E. Lunz, John A. Stahl,

Psychometric Methodologies and Testing

The purpose of this research project was to confirm that differences in the severity of judges and the stringency of grading periods occur, regardless of the nature of the assessment or the examination materials used. Three rather different examinations that require judges were analyzed, using an extended Rasch model to determine whether differences in judge severity and grading-period stringency were observable for all three examinations. Significant variation in judge severity and some variation across grading periods were found on all three examinations. This implies that regardless of the nature of the examination, items, or judges, examinee/measures cannot be considered independent of the particular judges involved unless correction for severity is made systematically. Accounting for judge severity and gradinig-period stringency is extremely important when pass/fail decisions that are meant to generalize to competence are made, as in certification examinations.