The 0–100 index
How each answer is scored, why always placing last is worth less than leading half the time, and why results vary between runs.
- 3
- First place
- 2
- Listed among the options
- 1
- Mentioned in passing
- 0
- Absent
How it adds up
IVIA is the percentage of points earned against points available. Appearing in every answer but never first gives a very different number from appearing in half and leading — and that difference is what tells you where to work.
Why it varies
Models are not deterministic: the same question can yield different answers hours apart. That is why many questions are measured rather than one, and why the trend over time says more than any single run. Any tool promising a stable number is hiding this from you.