ERIC Number: ED170363
Record Type: RIE
Publication Date: 1979-Apr-11
Reference Count: 0
Combined Common Person and Common Item Equating of Medical Science Examinations.
Kelley, Paul R.
This equating study of the National Board of Medical Examiners Examinations was a combined common persons and common items equating, using the Rasch model. The 1,000-item test was administered to about 3,000 second-year medical students in seven equal-length subtests: anatomy, physiology, biochemistry, pathology, microbiology, pharmacology, and behavioral science. Scores were equated through common items to those on a similar reference examination administered previously to approximately 8,500 second-year students. Although scores are reported for each of the seven subtests, pass or fail decisions toward certification are based only on the total score. Items on the previously administered reference subtests were calibrated and equated by shifting the item difficulties to a common scale such that each test would produce the same estimate of ability for the sample tested, resulting in a mean ability score of zero for the examinees. Current test items were also calibrated; link analysis indicated differences in current and reference test items. Item difficulties were then adjusted to equate the current examination to the reference test. (A second equating study is also described). (GDC)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers: National Board Examinations; Rasch Model
Note: Paper presented at the Annual Meeting of the American Educational Research Association (63rd, San Francisco, California, April 8-12, 1979) ; Figure 1 may be marginally legible due to type