Clear ideas about intelligence
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Clear, rigorous articles about intelligence, the IQ scale, percentiles and how your brain reasons.
The scale
The IQ Scale Explained: From 55 to 145 and Beyond
The IQ scale runs from extreme lows to rare highs, all built around a mean of 100 and a standard deviation of 15. Here's how to read it correctly.
5 min read →
The scale
What Is a Good IQ Score? Understanding the IQ Range
A good IQ score generally falls between 100 and 130. Here's how the IQ scale actually works, what counts as average or high, and how to read your own number.
6 min read →