The current format of the United States Medical Licensing Examination Step 1 (USMLE Step 1) exam emphasizes clinical vignettes—in single-bestanswer multiple-choice format—as the only test question. The examination is 350 questions broken into seven blocks of 50 questions each. Examinees have one hour to complete each block. Clinical Vignettes for the USMLE Step 1: Fourth Edition parallels this format. The book contains 350 clinical vignette-style questions covering the core basic sciences and was assembled based on the published content outline for the USMLE Step 1. The questions are divided into 7 blocks of 50 questions. As on the Step 1 exam, each block tests the examinee on all core basic.
