{
  "version": 1,
  "as_of": "2026-11-01",
  "status": "editorial-assumption",
  "status_note": "The uncertainty values below are editorial assumptions chosen to be conservative. They are NOT published or validated by NBME, UWorld, AMBOSS or USMLE. Replace them with sourced calibration data when it is available, and update as_of.",
  "model": {
    "bias": 0,
    "drift_per_week": 0.5,
    "min_sigma": 8,
    "correlation": 0.5,
    "max_weeks": 104
  },
  "step1": [
    {"id": "nbme-cbssa", "short": "NBME CBSSA", "name": "NBME Comprehensive Basic Science Self-Assessment (CBSSA)", "sigma": 9, "min": 120, "max": 300},
    {"id": "uwsa", "short": "UWorld UWSA", "name": "UWorld Self-Assessment (UWSA) for Step 1", "sigma": 10, "min": 120, "max": 300},
    {"id": "amboss", "short": "AMBOSS self-assessment", "name": "AMBOSS Step 1 self-assessment", "sigma": 11, "min": 120, "max": 300},
    {"id": "other", "short": "Other practice exam", "name": "Another practice exam that reports a three-digit score", "sigma": 12, "min": 120, "max": 300}
  ],
  "step2ck": [
    {"id": "nbme-ccssa", "short": "NBME CCSSA", "name": "NBME Comprehensive Clinical Science Self-Assessment (CCSSA)", "sigma": 9, "min": 120, "max": 300},
    {"id": "uwsa", "short": "UWorld UWSA", "name": "UWorld Self-Assessment (UWSA) for Step 2 CK", "sigma": 10, "min": 120, "max": 300},
    {"id": "amboss", "short": "AMBOSS self-assessment", "name": "AMBOSS Step 2 CK self-assessment", "sigma": 11, "min": 120, "max": 300},
    {"id": "other", "short": "Other practice exam", "name": "Another practice exam that reports a three-digit score", "sigma": 12, "min": 120, "max": 300}
  ]
}