2006 USMLE BULLETIN : Scoring and Score Reporting
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Examination Results and Scoring
When you take Step 1, Step 2 CK, or Step 3, the computer records your responses. After your test ends, your responses are transmitted to the NBME for scoring. The number of test items you answer correctly is converted to two equivalent scores, one on a three-digit score scale and one on a two-digit score scale. Both scales are used for score-reporting purposes.
On the three-digit scale, most Step 1, 2 CK, or 3 scores fall between 140 and 260. The mean score for first-time examinees from accredited medical school programs in the United States is in the ...