Average IQ Trends by Age
A rough guide to how average IQ, processing speed, and memory tend to change across age groups, with an explanation of the difference between fluid and crystallized intelligence.
Fluid intelligenceCrystallized intelligenceProcessing speed
Fluid intelligence (the ability to solve novel problems) tends to peak at a young age, while crystallized intelligence (knowledge and vocabulary) tends to grow with age.
This data is based on statistics from IQ test takers
Measure yours too →* Figures are estimates and illustrative values based on a normal distribution model and general findings. They are not aggregated from actual test-taker data.