Whats the difference between a criterion-referenced test and a norm-referenced test?
A. A criterion-referenced test measures students’ performance against set standards. The WASL is criterion-referenced and measures whether students have learned the specific skills, concepts, facts and ideas found in Washington’s standards. By using a combination of multiple choice, short answer and essay questions, the WASL allows for a deeper assessment of important skills and knowledge found in the state standards. Norm-referenced test like the Iowa Test of Basic Skills (ITBS), also administered in Washington state, help us learn how students compare to each other by measuring their scores against an average national score. Norm-referenced tests are scored using a national curve in which half the students receive a score above 50 percent and half below. The comparison group is called the “norm,” explaining why these tests are often referred to as “norm-referenced” tests. Norm-referenced tests are generally comprised of multiple choice and/or true-false questions.
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