No matter how accurately examination forms are assembled to reflect a specific degree of difficulty, there is always some variability. The goal is to make certain that subsequent forms have the same degree of difficulty as the original form, but this is not always possible. For that reason, a standard scale for reporting results is used. Suppose one candidate takes a relatively easy examination and receives a raw score of 82. During another administration, a candidate takes a relatively difficult version of the same examination and receives a raw score of 77. Is the first candidate more competent than the second? Read more.
June 11, 2007
