In the research reported here, we propose a new method for scale alignment and test scoring in the context of supporting students with disabilities. In educational assessment, students from these special populations take modified tests because of a demonstrated disability that requires more assistance than standard testing accommodation. Updated…

This study developed, applied, and evaluated a theory-based method of detecting the underlying causes of differential difficulty. The method was applied to two subgroups taking the Scholastic Aptitude Test-Mathematics (SAT-M), 261 visually impaired students taking Braille forms of the test and 1,985 black students at 3 test administrations. It…