IQ articles
Guides to IQ scores, percentiles, country comparisons, and online testing, with explanations of the UniversalIQTest.com methodology.
Try the free 40-question visual reasoning test, then interpret your result using its participant reference group and scoring methodology.
On a normal IQ scale with mean 100 and standard deviation 15, 100 is the midpoint, 115 is above average, and 130 is very high. Descriptive ranges and percentiles depend on the scale and reference group; an online result needs its own context.
These country comparisons describe people who completed this online test and selected a country. They do not measure the average IQ of each country’s population. Read the sample size, collection method, and scoring limitations before comparing groups.
An online IQ test reports performance on its own tasks and reference group. Its accuracy depends on evidence of reliability and validity, not on the number of participants alone.
On a normal IQ scale with mean 100 and standard deviation 15, IQ 120 is approximately the 90.9th percentile: about 90.9% of the modelled group scores lower and 9.1% higher. Convert a score to a percentile, or work backwards from a percentile to an IQ score.
Forty visual matrix questions in one sitting: learn what the tasks measure, how your score is compared with other participants, and what the result can tell you.