Diagnostic judgments are often based on the comparison of two measures in order to judge whether the individual shows a genuine discrepancy in the traits or characteristics that the two measures represent. Until a perfect psychometric battery comes along, psychometricians can offer some guidance on the level of confidence to be placed in…

This study provides data on norming and performance standards on the Stanford Achievement Test, 9th Edition, for both hearing and deaf students. It graphically analyzes these data in the context of interpreting individual test scores, examining achievement of groups of students, and specifically, interpreting test scores of high achieving deaf and…