IQ score
An IQ score is a standardized index of cognitive performance relative to a norm group, typically scaled to mean 100.
Reviewed by: Scientific Review Team · Last reviewed: July 2026
IQ scores summarize performance on a battery or short form. They are not raw counts of correct answers — conversion through norm tables is essential. Labels like 'gifted' or 'average' depend on the scale's mean and SD.
Synonyms: intelligence quotient, FSIQ
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FAQ
What is an average IQ?
By convention the mean is set to 100 for the reference population of the specific test edition.
Scientific sources
- Wechsler scales technical documentation.