Open-Source Psychometrics Project
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Full Scale IQ Test

This test measures IQ with an overall score as well as scores for component abilities.


The Intelligence Quotient (IQ) is the measure of human cogntive ability. Scores are set so that the average is 100. There is controversey about how IQ scores should be broken down, this test uses the 3 domains from Hampshire, Highfield, Parkin and Owen (2012) of (1) Short-Term Memory, (2) Reasoning, and (3) Verbal. This model seems to fit best on internet populations.

WARNING: Every on-line IQ test is bad

While a lot of working has been put into making sure this has good measurement properties, it is not a replacement for a real IQ test. Not on-line test is. A main reason is that no one in the on-line context has the attention span for a reliable assessment. The Wechsler Adult Intelligence Scale (a reasonable candidate for the title 'gold standard IQ test') takes more than an hour [1]. This test was designed with a cap of taking 20 minutes, because we like engagement and engagement drops off fast after that. This should be understood as demonstration of how an IQ test can work, rather than a score you should make decisions based off of.


This test has six sections. Each section has its own instructions. This test is meant to be taken solo, without references or materials. It will only be valid the first time you take it, so if you want an accurate result do not start the test until you are ready. The average person takes between 10 and 15 minutes to finish the test, and this is important. See the graph below:

There is not much benefit to taking a super long time on the test, but if you speed through in less than 10 minutes your scores will be much lower than they would otherwise be.


This test is provided for educational use only. It should not be used as psychological advice of any kind and comes without any guarantee of accuracy or fitness for any particular purpose. Also, your responses may be recorded and anonymously used for research or otherwise distributed.

  Updated: 30 December 2019
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