How to Read Score Bands
- Over 140: Very high
- 120-140: Superior
- 110-119: High average
- 90-109: Average
- 80-89: Low average
- 70-79: Borderline
- Under 70: Extremely low
Reference: Lewis Terman classification model, modernised band labels.
What IQ Scores Mean
Use this page to interpret score ranges, understand methodology context, and review key cautions.
Global Snapshot
Methodology and Sources
Country values on this site are educational reference estimates, not individual diagnosis.
Interpret comparisons carefully and consider sampling and methodology differences.
GDP per capita values are compiled from IMF PPP per-capita figures, and life expectancy values from UN Population Division estimates.
For deeper context, visit the IQ Research and related research topic pages.
FAQ
Are country values personal test results?
No. They are population-level reference estimates.
Can countries be compared directly?
Only as rough reference; methodological limits should be considered.
Where is the full country table?
See the Average IQ by Country page for sortable data and world map.
Is this medical, legal, or hiring advice?
No. Content is educational only.