On March 3, 2014, the National Board of Medical Examiners (NBME) retired Form 5 and 6 of the Step 1 NBME Comprehensive Basic Science practice exams (CBSSA). CBSSA Form 16 is accessible as of March 3rd and is available in both regular and expanded feedback.
The NBME created CBSSA for students to have content that is similar to the USMLE Step 1 exam.
According to the NBME site, “All forms of CBSSA started on or after March 3rd will appear on a different longitudinal performance profile due to changes in the minimum passing score for Step 1 and due to changes to the CBSSA score scale. In addition, CBSSA forms completed prior to March 3rd will not be rescored or compared longitudinally against those started after this date.”
There are currently 6 forms available for practice.
The CBSSA Forms for Step 1 are: 7, 11, 12, 13, 15 and 16 – Cost $50/exam
The CBSSA Forms with expanded feedback are 7, 11, 12, 13, 15 and 16 – Cost $60/exam
For more information see the NBME site/announcement here.