# IQ score: what it measures, what is normal and what a high IQ means > A number that seems to say everything and says a good deal less. What an IQ score is, what a normal IQ is, what a high IQ means and which test can guide you if you suspect you are gifted. *https://mypsicotest.com/en/blog/iq-score/ · Published: 2026-09-30 · 7 min read · MyPsicoTest team* You do a twenty-question intelligence test on some website and the result says 142. You half believe it. Maybe at school you were told you were clever but lazy, or that you had plenty of ability and little perseverance, and for years you have wondered what the result would have been if someone had measured you properly. The **IQ score** is one of the most quoted and least understood ideas in psychology. It looks like a number that sums up everything about a person, when in fact it sums up a fairly specific part. This guide explains what IQ is, how it is measured, what a **normal IQ** is, which score counts as high, why online tests are no use for finding it out and which test can guide you if you suspect you are gifted. ## What an IQ score is IQ, short for intelligence quotient, is the score obtained on a **standardised intelligence test**. The key word in that definition is standardised: the test has already been given to a large sample of people, and your result is compared with that of people your age. An IQ does not say how much intelligence you have in absolute terms, but where you stand relative to others. In Spanish, the language of most of our readers, two names are used for it, coeficiente intelectual and cociente intelectual, and both mean the same thing. Modern tests are built so that the population average is 100 and the standard deviation, which shows how far scores spread from that average, is 15. Everything else, including what counts as a high or a low IQ, follows from that. ### How IQ is measured For adults, the reference test is the **WAIS-IV**, the Wechsler Adult Intelligence Scale. It is given individually by a trained psychologist, and as well as a full-scale IQ it produces four indices: verbal comprehension, perceptual reasoning, working memory and processing speed. These indices are often more useful than the overall figure, because many people have uneven profiles, with some areas far above average and others around the average. ### What each index measures - **Verbal comprehension:** vocabulary, knowledge of concepts and the ability to reason with words. - **Perceptual reasoning:** solving new problems using visual information, such as completing patterns or building shapes. - **Working memory:** holding information for a few seconds and working with it, for example repeating a series of numbers backwards. - **Processing speed:** speed and accuracy on simple tasks against the clock. A person with extremely high verbal comprehension and average processing speed may get a full-scale IQ that reflects neither. That is why a good report looks at the profile and not only at the number. ![Psychologist reviewing the results of an IQ assessment on her clipboard](https://mypsicotest.com/assets/img/blog-evaluacion-coeficiente-intelectual-1200.webp) ## What is a normal IQ score? With an average of 100 and a standard deviation of 15, scores are spread along the familiar bell curve. In practice this means: | IQ score | Approximate share of the population | |---|---| | Between 85 and 115 | About 68%: the most common range | | Between 70 and 130 | About 95% | | 130 or above | Around 2% | | Below 70 | Around 2% | So a **normal IQ** is any score around 100, and most people fall between 85 and 115. At the lower end, [MedlinePlus](https://medlineplus.gov/ency/article/001523.htm), the health information service of the US National Library of Medicine, lists a score below 70 on a standardised IQ test among the criteria considered for intellectual disability, always together with difficulties in adaptive behaviour and never on its own. One point that is rarely explained: every score has a margin of error. So a serious report should not be read as "you have 127", but as a likely range around that figure. ## What a high IQ means The classic criterion for **intellectual giftedness** is an IQ of 130 or above on a standardised test, that is, two standard deviations above the average, which places a person roughly in the top 2% of the population. That figure is useful, but it does not explain everything. IQ does not capture creativity, motivation or the way a person experiences emotions, which is why current models of giftedness take more than the number into account. A high IQ can also coexist with other conditions. This is known as **twice-exceptionality**: giftedness together with ADHD, autism or dyslexia. In these cases the profile can be very uneven and the talent can go unnoticed for years. If you recognise yourself in absent-mindedness and impulsiveness, the [ADHD Test](https://mypsicotest.com/en/adhd-test-adults/) will help you see it, and we give the bigger picture in [Neurodivergence in adults: what it means, signs and where to start](https://mypsicotest.com/en/blog/neurodivergence-in-adults/). A high IQ does not guarantee that everything goes smoothly, either. Many gifted adults who were never identified describe chronic boredom, anxiety, paralysing perfectionism or underachievement because they drop whatever does not motivate them. This is not part of giftedness itself, but of the mismatch with an environment that never recognised it. ## What an IQ score does and does not tell you - **It does not measure everything we call intelligence.** It measures performance on specific reasoning, memory and speed tasks. Other abilities, such as creativity or the way you handle emotions, are left out. - **It is compatible with having difficulties.** The [NHS](https://www.nhs.uk/conditions/dyslexia-in-children/) points out that dyslexia does not affect intelligence. Some people with a high IQ read with effort, and the [Dyslexia Test](https://mypsicotest.com/en/dyslexia-test-adults/) helps detect this. - **It depends on who you are compared with.** A [meta-analysis by Jakob Pietschnig and Martin Voracek](https://pubmed.ncbi.nlm.nih.gov/25987509/), covering almost 4 million participants from 31 countries, found that scores on IQ tests rose worldwide for more than a century, by about 0.28 points a year in full-scale IQ, although this increase has slowed in recent decades. This is the so-called **Flynn effect**, and its practical consequence is that a score only makes sense when compared with recent norms. ## Why online IQ tests are not reliable A valid IQ needs three things: a **standardised test with norms**, given under controlled conditions and scored and interpreted by a professional. The IQ tests that circulate online hardly ever meet any of the three. You do not know which population your result is compared with, what the margin of error is, or whether the questions measure what they claim to measure. A few signs give away an unreliable IQ test: - It promises your exact IQ in five minutes from a handful of questions. - It does not say who designed it or which sample the scores were calculated on. - It asks you to pay or hand over your details to see the result. - Almost everyone who takes it scores above 120. If only around 2% of the population scores above 130, a test on which half your group of friends does is measuring something else. That does not mean an online questionnaire is useless. It can help point you in a direction, as long as it does not claim to give you a figure that only an assessment can give. If you have ever felt like a fraud despite your achievements, you may also find [Impostor syndrome: why you feel you are about to be found out](https://mypsicotest.com/en/blog/impostor-syndrome/) interesting. ## Which test to take if you think you may be gifted The MyPsicoTest [Giftedness Test](https://mypsicotest.com/en/giftedness-test-adults/) does not measure your IQ, and it says so clearly. It is a 20-question questionnaire about what you have been like throughout your life, looking at three areas: **cognitive ability and learning**, **creativity and curiosity** and **emotional intensity and sensitivity**. The result, from 0 to 80, tells you how far the way you describe yourself matches the profile described in gifted adults. If your score is high, the next step is a psychometric assessment with a professional: a standardised intelligence test, usually the WAIS-IV, and an interview about your history. Only that assessment can confirm giftedness. The rest of the questionnaires, free and anonymous, are in the [psychological tests](https://mypsicotest.com/en/psychological-tests/) catalogue. ## Frequently asked questions ### What is a normal IQ score? The population average is 100, and about 68% of people score between 85 and 115. Any score in that range is considered normal. Around 95% of the population falls between 70 and 130. ### What IQ counts as gifted? The classic criterion is an IQ of 130 or above on a standardised test, which corresponds roughly to the top 2% of the population. Current models also take creativity, motivation and the profile across areas into account, so the figure on its own is not enough. ### What does IQ stand for? Intelligence quotient. It is the score on a standardised intelligence test, expressed so that the population average is 100. In Spanish it is called coeficiente intelectual or cociente intelectual, both meaning the same. ### Are online IQ tests reliable? In general, no. A valid IQ requires a standardised test with norms, given under controlled conditions and interpreted by a professional. Online tests do not usually say which population your result is compared with or what the margin of error is. ### Can your IQ change? Every score has a margin of error, so two assessments may give slightly different figures. At the population level, scores also rose for more than a century, the so-called Flynn effect, which is why results only make sense when compared with recent norms. ### Does the MyPsicoTest giftedness test measure IQ? No. It is a 20-question self-report questionnaire that looks at cognitive, creative and emotional indicators described in gifted adults. It helps you decide whether an assessment is worthwhile, but IQ can only be measured with standardised tests given by a professional. ### Can you have a high IQ and dyslexia or ADHD? Yes. This is known as twice-exceptionality. The NHS points out that dyslexia does not affect intelligence, and giftedness can coexist with ADHD or autism. In these cases the profile is usually uneven and an assessment that takes both into account is advisable.