You can only review for these tests. You can't really learn judgement studying. Diagnostic scenerios might help. What treatment would be ordered for each scenerio and understanding looking at imaging and lab work to come up with specific diagnosis. Also what would you do to evaluate the treatment.
The test evaluates your analytic abilities. I remember questions regarding interpreting diagnostic tests to get the best diagnosis. Also evaluating best treatments given a diagnosis. You evaluate patient scenerios. I score 82% without really any review. I think you just need to use your already acquired knowledge and experience.
I just took the test yesterday. Found out today that I passed. You really just need a working knowledge of the diagnostic process and treatment of the conditions for which the diagnosis pertains to. I was a little nervous taking the test. You have nothing to lose for trying!