The major forms of evidence that support a standard's credibility are reviewed, and what can be done over time and for different forms of an examination to enhance its comparability in a credentialing setting is outlined. Pass-fail decisions must be consistent to ensure a standard's credibility. (SLD)

Whether cutting score equivalents (CSEs) based on examinee performance are the same as CSEs based on expert judgment was examined using data from 3,262 examinees taking an internal medicine certification examination. CSEs produced by 40 physicians/experts were closer to the criteria than were standards derived from examinee performance. (SLD)