Educational Assessment

Scale score interpretation is the process of reading a test result that has been converted onto a fixed numerical scale,

Test information functions are a way of describing how precisely a test measures students across different levels of ability. Educators,

Three parameter model basics describe a way of understanding how individual test questions behave, and they matter because scores depend

Two parameter model basics describe one of the most widely used ways testing specialists understand how a question behaves across

This Rasch model overview explains a statistical method that educators and test designers use to place students and test questions

Item response theory basics describe a family of statistical models that link how a student answers a test question to

Distractor effectiveness describes how well the wrong answer choices on a multiple choice question do their job of attracting students

Item discrimination interpretation is the process of reading a single test question’s statistics to decide how well it separates students

Item difficulty estimation is the process of working out how hard each question on a test is, based on how

Internal consistency measures are statistics that show whether the items on a single test tend to measure the same underlying