What is the difference between the Woodcock Johnson III (WJ III) and the bubble type tests?
One significant difference between the WJ III and bubble type tests is the range of difficulty of test items used and the generation of Grade Equivalency (GE) scores. Multiple choice, grade specific tests (like the IOWA and CAT) are composed of items within a limited range of difficulty. WJ III administrators give students questions up to any grade level that they can accomplish correctly within certain ranges. Therefore, the WJ III GE score better reflects what the student can accomplish. In addition, a Relative Mastery Index predicts the student’s success with grade level material. These scores and others aid the parent in deciding which areas may need improvement and which areas are accelerated for that student.
