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Peer reviewedImpara, James C.; Plake, Barbara S. – Journal of Educational Measurement, 1998
Sixth-grade teachers (n=26) estimated item performance for their students (724 total students) on a 50-item district-wide science test. Teachers were more accurate in estimating performance of the total group than of the borderline group, but in neither case was their accuracy high. Estimating proportion-correct values using the Angoff standard…
Descriptors: Difficulty Level, Elementary School Teachers, Grade 6, Intermediate Grades
