The ABFM begins to use differential item functioning

The American Board of Family Medicine (ABFM) believes that it is important to have evidence to show that the pass-fail decisions related to its examinations are based upon accurately determining the minimum knowledge necessary to be a board certified family physician, and furthermore, that these decisions are unbiased against any particular subset of the population. Accordingly, as part of the ABFM’s commitment to continuously improve the Maintenance of Certification for Family Physicians (MC-FP) process, the ABFM has started using differential item functioning (DIF) procedures to detect potentially biased items on its examinations. Although gender information has been collected for some time from examination applicants, we began collecting ethnicity data for applicants taking the MC-FP exam this past spring so that we could begin to conduct these analyses.