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IQ, an abbreviation for Intelligence Quotient, is a standardized measure of intelligence expressed as a numerical score.
Although subject to a margin of error, an individual's IQ can be calculated by taking an intelligence test. The average IQ score is defined as 100, with scores above or below indicating performance above or below average. Achieving a score higher than 100 indicates superior performance, while a lower score suggests below-average performance.

The average IQ score is always 100, with individual scores reflecting an individual's ranking compared to the norm group who took the test. Scores between 85 and 115 are considered average, while scores lower than 69 are present in only 2% of the population and can be challenging to measure using standard intelligence tests. Similarly, very high IQ scores over 150 can be difficult to accurately determine due to the need for a large reference group to establish a reliable score. With infrequent occurrence of such extreme scores, forming a reference group presents a challenge.

You can practice IQ tests, it will not make you more intelligent but it will increase your IQ score on a job test for example. Be sure to try any IQ test we offer for free in our IQ tests section. Especially for assessment preparation this will be very useful!

In a classic IQ test you will generally find questions related to numerical reasoning, logical reasoning, verbal intelligence and spatial intelligence. An IQ test that primarily measures abstract reasoning, either inductive or deductive, will often be a non-verbal IQ test. The latter is then called culture-fair because of that.

Both classic and non-verbal IQ tests make for valid and reliable IQ score measurements, although their definitions of intelligence do vary. Generally an IQ test consisting of more questions will have a higher reliability than shorter tests.

With our IQ tests we aim to be the number one central point on the web to take certified IQ tests, free aptitude tests and practice for IQ test assessment. If you like taking intelligence tests, practice IQ quizzes or want to know if you might qualify for membership of high IQ societies, you are at the right place.We try to avoid cultural and language biases in our IQ tests to make fair and sound assessments across countries and continents. Verbal measurements of intelligence tend to favor native speakers strongly. Therefore our IQ tests generally focus on abstract logical reasoning only.Take a free demo IQ test online right now and dare your friends to outscore you!