Normed tests are tests that are normed by collecting large amounts of data and comparing age and grade groups. Standardized tests are normed across fairly large groups, especially group intelligence and group achievement tests, such as the California Achievement Test (CAT,) the Scholastic Aptitude Test (the SAT) or the Woodcock Johnson Test of Achievement.
When creating normed tests, the test creators administer the test to large groups of children (subjects) across age groups. They evaluate individual items, they will also compare scores across age groups, across geographic areas, sometimes even across racial or socio-economic groups. This information is used to create the norms that will be used to evaluate individual students' performance on the same items.
