Today, we will talk more about the NBME self-assessment tests. We previously discussed what the NBME self-assessment tests are and how they impact your USMLE review. You can read the posts here. Now we will cover three important topics. When to use the NBME self-assessment tests, how to use the NBME self-assessment tests and how wise it is to use the USMLE World self-assessment tests instead.
We now know that the NBME self-assessment tests are accurate in predicting actual USMLE performance. And we also know that the main reason for this accuracy is the correlation study done by NBME between the two tests using AMGs performance in both tests rather than to any real similarity between the 2 tests. This correlation has also been borne out by most test takers who narrated their experience in forums. It can be used to gauge whether you will pass the examination and even if you have a good chance of achieving the score you are aiming for.
How to use the NBME Self-assessment tests
Best time to take the NBME Self-assessment tests
So when is the best time to take the NBME? The best time is when you think that you are ready for the USMLE. When all parameters indicate that you are probably ready for the USMLE examination, you take the NBME to confirm that you are ready for the examination. In other words, use the NBME as a diagnostic or confirmatory test, instead of a screening test. You can use your performance in USMLE World Q Bank or Kaplan Q Bank as a screening test.
Use NBME Self-assessment Tests to assess readiness, not identify weak points
The practice of many to take the NBME Self assessment tests to identify weak points and measure progress in review is not very practical. First, there are only 7 NBME tests (for Step 1) and second, you can take it only once. Taking it more than once invalidates the correlation and therefore its accuracy in predicting actual USMLE performance. Therefore, what do you do if you are still not ready after taking all six tests? You just used up your most valuable tool for predicting your actual performance in the USMLE.
Personally, I used the NBME exam to confirm my readiness to achieve my targeted score of 99. In preparing for USMLE Step 1, when my Kaplan scores were hitting 84 and above, I felt I was ready for the test. I took NBME form 1 only and 740 confirmed my readiness for the USMLE exam since I was aiming for a 99. 600 was enough for a 99, but I would have postponed if I got less than 660. Why? Since I decided I want only a 99, I was giving myself a 10 point leeway (600=240 and 660=250) to make sure I make it to a 99 no ifs, ands, or buts. 😉 The same thing holds true for Step 2 CK, I took the exam when my one and only NBME assessment test scored 700, way above what I needed for a 99.
Timed NBME Self-assessment Tests for best results
Another common question is whether to take the NBME examination timed or self-paced. Since you are trying to test your actual readiness for the USMLE examination, it is best to simulate actual exam conditions. In my case, I took self-paced but finished everything in the 1 hour allotted for it. I may look over the questions after 1 hour, but I will not change them so as not to alter the score predictability too much. Make sure everyone in the house knows not to disturb you while doing this. Although you can pause the exam, it is not recommended. Also I do not recommend you do it in a public library. There was one person who took the USMLE despite getting a low score in NBME self assessment test. He attributed it to the fact that he took it in a noisy public library and “upward adjusted” his predicted score. He failed. So, take it properly and trust the score. One warning, though, correlation is not 100% therefore always give yourself some leeway in case things do not go too well. Never, ever go for the USMLE examination if you scored 400 or less. Your chances of failing is too high and even if you passed 75 and 76 are with you for life.
What about the USMLE World Self-assessment tests
Recently, USMLE World started offering their own assessment tests for US$ 30 each, US$ 15 cheaper than NBME’s assessment tests. The question foremost in everyone’s mind is, can I switch to UW assessments tests instead of NBME’s. How wise is a decision like that?
The reason for using assessment tests is to make sure you are ready for the USMLE and to lessen the risk of getting an adverse score. NBME has proven throughout the years, after thousands of test takers, that it is a reliable predictor of your actual score in the USMLE. It is also backed up by correlation studies that have been published in journals. Now, although USMLE World’s assessment test may also be a reliable predictor of your actual USMLE performance, all we have is their word for it. No study has been cited or provided to independently verify such claim. And not enough empirical evidence from test taker’s experience forums allow us to make any judgment on its accuracy at all. Surveying forum after forum reveals variable experience with the tests as of now.
My take is that since you only have one shot at the USMLE, it is better to go with what is proven and tested rather than take a risk. Although, you can retake the USMLE if you fail, that failure is recorded and counted against you. If you pass, the score is with you the rest of your professional life. If you chose to, maybe you can use the UW assessment tests as a screening tool. Just be sure to use the NBME assessment test, whatever form to confirm your readiness before actually sitting for the USMLE.