What Is the Average IQ of Doctors? The Number vs. the Data
"125" gets repeated everywhere with no source. The actual data traces to 30 physicians in one dataset. Here's what's really been measured.
11 min read
IQ Data & Demographics
Average IQ by age, country and education — how intelligence is distributed across populations.
7 articles
The Negative Flynn Effect: Are IQ Scores Actually Falling?
IQ scores rose for a century, then reversed in several countries. The best evidence shows the fall is environmental, not genetic.
7 min read
What Is the Average IQ in the USA? (2026 Data & Sources)
The average IQ in the USA is 100 — by design. Here's why some sites say 97.43, what state IQ rankings actually measure, and how US adults really compare internationally.
10 min read
The Flynn Effect: Why IQ Scores Rose for a Century (2026)
The Flynn effect is the generational rise in average IQ scores — about 3 points a decade in the 20th century. What causes it, whether it's still happening, its criticisms, and what it means, in plain English.
4 min read
Average IQ by Age — How IQ Changes Across the Lifespan
How average IQ scores relate to age, why tests are age-normed, when cognitive abilities peak, and what changes (and doesn't) as you get older.
4 min read
Average IQ by Country — Rankings, Data & Caveats
Average IQ estimates by country, how the data is gathered, the serious methodological caveats, and why national IQ comparisons are widely contested.
4 min read
What Is the Average IQ? (2026)
The average IQ is 100 by definition — but what does 'average' really mean, how is it set, and how does it vary by age, country and education?
5 min read