Efficiency Using Contrasting Groups Method at Determining of Cut-Off Score of The Criterion-referenced Test

This study aims at determining of cut-off score of the criterionreferenced test that measures the fifth primary grades ability to solve verbal problems that require carrying out division and other calculations in homs by using contrasting groups method and making sure of it efficiency of Lessing from the classification errors comparative with the sample mean with the volume /400/ male and female pupil. The study concluded that the classification errors yielded by the cut-off score identified by contrasting groups method /74/ were less than the sample mean /66/ of which to point out efficiency the used method at this study.