About us
The International IQ Test team
International IQ Test was developed and launched online in 2018 by an independent team of psychometric researchers specializing in the design, development, and maintenance of online psychometric tests. The team continues to maintain the test and is made up primarily of developers and independent psychometric researchers. Another psychometric project developed and maintained by the team is the Jung cognitive functions test.
The International IQ Test is not affiliated with any government, is not sponsored by any outside company, and does not sell users’ data. The IQ test and full results are 100% free, with no email address or form required. The website’s only revenue comes from the AdSense ads it displays.
Like any online IQ test, the International IQ Test provides estimates, not diagnoses. It has nevertheless been refined to be as reliable as possible within the constraints of online IQ testing. To make its methodology transparent, the International IQ Test team publishes internal technical reports documenting the test’s statistical properties, reliability, and limitations.
These include:
For questions or suggestions, you can reach the team through the Contact section.
A distinctive feature of the International IQ Test
One distinctive feature of the International IQ Test is its standardization approach, which takes into account the share of the world’s population living in each country represented. The samples analyzed have a mean IQ close to 100 and a standard deviation close to 15.
IQ is interpreted relative to a reference population. For example, the US version of the WAIS-IV is normed on a stratified sample designed to reflect the United States population, rather than a global population weighted by country. Our approach aims to establish an international reference by accounting for the population share of each country covered, subject to the coverage and sampling limitations detailed in our technical report.