Kryterion's psychometricians can analyze your test taker's responses to items and assess the psychometric quality and efficacy of those items and of the overall exam. Our psychometricians will help you identify which items need to be retained, rewritten or discarded, in order to enhance the measurement precision of your tests. Our detailed reports provide information on the item difficulty, discrimination and how many test takers selected each option, as well as a number of other valuable statistics. In addition to using IRT approaches, various approaches such as Differential Item Functioning (DIF) can be used, when appropriate.