Though many test developers have utilized item response theory in their work, few have taken advantage of the potential of item response theory for providing new interpretation procedures that accentuate the educational implications to be drawn from test scores. This paper describes several features, based upon the Rasch difficulty and ability…

The results of the Woodcock Reading Mastery Tests were found to be quite similar for both learning disabled and normal Ss, with high reliability and a unidimensional factor structure. The same was found for the Keymath Diagnostic Arithmetic Test, though the assumption of a unidimensional math achievement was found to be less defensible for the LD…

The KeyMath Revised is a power test that measures the understanding and application of mathematics skills and concepts. It is individually administered and is intended for students from kindergarten through the ninth grade to determine student mastery of mathematics concepts. The revised version is designed to be user-friendly for the student and…