The passing score for Shelf exams at my school vary with each rotation. For neuro it was 55, and the avg was 65. For peds, it was 60 to pass, with the avg at 70. As there are 100 questions on the test, I would think the scores would be raw, but Im not certain. I also think that these Shelf questions are harder than what Step II would be (I found this to be the truth for my M2 Shelf exams vs. USMLE Step I).