Intelligence quotient - Wikipedia, the free encyclopedia


** Intelligence quotient **

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"IQ" redirects here. For the Inuit traditional knowledge commonly
abbreviated as "IQ", see Inuit Qaujimajatuqangit. For the British
progressive rock band, see IQ (band). For the film, see I.Q. (film).

Intelligence quotient

An example of one kind of IQ test item, modeled after items in the Raven's
Progressive Matrices test.
ICD-9-CM 94.01
MedlinePlus 001912

Human intelligence
Abilities, traits and constructs
· Abstract thought

· Communication
· Creativity

· Emotional intelligence

· /g/ factor
· *Intelligence quotient*

· Knowledge
· Learning
· Memory

· Problem solving
· Reaction time

· Reasoning
· Understanding

· Visual processing

Models and theories
· Cattell–Horn–Carroll theory

· Fluid and crystallized intelligence

· Theory of multiple intelligences

· Three stratum theory

· Triarchic theory of intelligence

· PASS theory of intelligence

Fields of study
· Cognitive epidemiology

· Evolution of human intelligence

· Psychometrics
· Heritability of IQ

· Impact of health on intelligence
· Environment and intelligence

· Neuroscience and intelligence

· Race and intelligence
· Religiosity and intelligence

· v
· t
· e

An *intelligence quotient,* or *IQ,* is a score derived from one of several
standardized tests designed to assess intelligence. The abbreviation "IQ"
comes from the German term /Intelligenz-Quotient/, originally coined by
psychologist William Stern. When current IQ tests are developed, the median
raw score of the norming sample is defined as IQ 100 and scores each
standard deviation (SD) up or down are defined as 15 IQ points greater or
less, although this was not always so historically.^[1] By this definition,
approximately 95 percent of the population scores an IQ between 70 and 130,
which is within two standard deviations of the median


how is iq measured

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