IQ and cognitive science
Research-backed articles on intelligence, cognitive assessment and what a score actually tells you.
What Does an IQ Test Actually Measure — and What It Misses
A modern IQ score is built from ten specific tasks across five abilities — and leaves out creativity, persistence, practical skill and emotional regulation. Here is exactly where the line falls.
How Is IQ Calculated? The Formula Most Sites Get Wrong
The formula at the top of Google — mental age ÷ chronological age × 100 — hasn't been used by a major test since 1960. Here's how IQ is really calculated, with a worked example from raw score to percentile.
IQ Test vs Cognitive Test: They Are Not the Same Thing
A doctor's ten-minute memory check, a hiring test with a brutal time limit and a full IQ battery all get called 'cognitive tests'. They answer three different questions — and only one produces an IQ.
Does IQ Change With Age? What Rises, Falls and Stays Put
Your IQ score is designed not to move after about age 20. Your abilities move a lot, in opposite directions at once. And a childhood score can shift 20 points before it settles.