Our platform processes cognitive assessment data from test-takers across 142 countries, maintaining one of the largest active databases of standardized intelligence metrics in the digital space.
Live Database Metrics
Data updated in real-time. Statistics reflect completed assessments from the past 90 days.
The Bell Curve: IQ Distribution
IQ scores follow a Gaussian (Normal) Distribution with a mean of 100 and standard deviation of 15. This means:
- 68% of the population scores between 85-115 (±1 SD)
- 95% of the population scores between 70-130 (±2 SD)
- 99.7% of the population scores between 55-145 (±3 SD)
| IQ Range | Classification | Population % | Percentile |
|---|---|---|---|
| 145+ | Exceptionally Gifted | 0.13% | 99.87th |
| 130-144 | Highly Gifted | 2.14% | 97.7th-99.9th |
| 120-129 | Superior | 6.87% | 90.9th-97.7th |
| 110-119 | High Average | 16.12% | 75th-91st |
| 90-109 | Average (Norm) | 49.86% | 25th-75th |
| 80-89 | Low Average | 16.12% | 9th-25th |
| 70-79 | Borderline | 6.87% | 2.3rd-9th |
Mean IQ by Age Cohort
Our database reveals subtle variations in mean performance across age groups, consistent with crystallized vs. fluid intelligence theory:
Note: These are population means. Individual variation far exceeds age-related trends. Many individuals over 55 score well above younger cohorts.
Data Collection & Privacy
All statistics are derived from anonymized, aggregated assessment results. We do not collect personally identifiable information beyond email addresses (used solely for result delivery).
Our dataset is continuously refined to maintain representativeness across:
- Geographic distribution (weighted by population density)
- Educational background (to control for test-taking experience)
- Language proficiency (culture-fair items minimize bias)
For research partnerships or access to anonymized data exports, contact our science team at research@iqofficial.com.