IQ testing

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IQ testing

Definition

Intelligence quotient (IQ) testing is a series of exams used to determine your general intelligence in relation to other people of the same age.

Alternative Names

Intelligence testing

Information

Many IQ tests are used today. Whether they measure actual intelligence or simply certain abilities is controversial. IQ tests measure a specific functioning ability and may not accurately assess a person's talents or future potential. Results of any intelligence test may be culturally biased.

The more widely used tests include:

Wechsler Preschool and Primary Scale of Intelligence
Stanford-Binet Intelligence Scales
Differential Ability Scales
Kaufman Assessment Battery for Children

Functioning abilities that are measured by these tests include language, mathematical, analytical, spatial (for example, reading a map), among others. Each test has its own scoring system.

In general, IQ tests are only one way to measure how well a person functions. Other factors, such as genetics and environment, should be considered.

References

Blais MA, Sinclair SJ, Stein MB. Understanding and applying psychological assessment. In: Stern TA, Wilens TE, Fava M, eds. Massachusetts General Hospital Comprehensive Clinical Psychiatry. 3rd ed. Philadelphia, PA: Elsevier; 2025:chap 7.

Chaves-Gnecco D, Feldman HM. Developmental/behavioral pediatrics. In: Zitelli BJ, McIntire SC, Nowalk AJ, Garrison J, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 3.

Review Date: 10/20/2024
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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