IQ Scores

IQ Scores

IQ stands for intelligence quotient. Supposedly, an IQ score tells one how “bright” a person is compared to other people. The average IQ is by definition 100; scores above 100 indicate a higher than average IQ and scores below 100 indicate a lower that average IQ. Theoretically, scores can range any amount below or above 100, but in practice they do not meaningfully go much below 50 or above 150.

Half of the population have IQ’s of between 90 and 110, while 25% have higher IQ’s and 25% have lower IQ’s:

Descriptive Classifications of Intelligence Quotients
IQ Score	Description	% of Population
130+	Very superior	2.2%
120-129	Superior	6.7%
110-119	High average	16.1%
90-109	Average	50%
80-89	Low average	16.1%
70-79	Borderline	6.7%
Below 70	Extremely low	2.2%

RESOURCE:

IQ Test Scores: The Basics of IQ Score Interpretation
Article explains the basics of IQ score interpretation.