Percentile
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A percentile tells you the percentage of people who score at or below your level. An IQ at the 98th percentile means you scored higher than 98% of the population.
IQ Glossary & Terms
IQ (Intelligence Quotient)
Deviation IQ
Ratio IQ
General Intelligence (g)
Fluid Intelligence (Gf)
Crystallized Intelligence (Gc)
Standard Deviation (SD)
Normal Distribution (Bell Curve)
📅 Last updated: 2026-06-18 · ✔ Reviewed by the All-Lifes editorial team ·
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📚 Sources & references
IQ classification — Wikipedia
Mensa International — What is IQ?
APA Dictionary of Psychology — Intelligence
Raven's Progressive Matrices — Wikipedia
Cattell–Horn–Carroll theory — Wikipedia
Flynn effect — Wikipedia
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IQ Glossary & Terms