Complete IQ Test Guide: How to Test, IQ Test Scales, Popular IQ Tests

Anyone would want to know if their child is a genius or if their child’s reasoning and cognitive skills are impeccable. Therefore, being able to measure their intelligence and mental ability is very important for most parents.

And it’s not only children’s IQ test scores that we wonder about. Adult intelligence is just as important when it comes to measuring your cognitive and mental ability.

We have the best IQ test for both you and your children, but first, get ready to learn everything you need to know about what IQ is, the IQ test scores, and to discover some interesting facts!

What Does IQ Stand For?

IQ stands for intelligence quotient. It is a value that can be calculated with the formula of IQ = (intelligence age/actual age) x100.

What Is IQ?

IQ is a measure of an individual’s reasoning ability. In short, it is supposed to assess how well someone can utilize information and logic to answer questions or make predictions.

“What does an IQ test measure?” you ask? Intelligence quotient tests help evaluate IQ by measuring short- and long-term memory. They also measure how efficiently and quickly people can solve puzzles and recall information they’ve heard.

The MentalUP IQ test does not provide you with an IQ score. Instead, it provides insight into the 5 most important areas of mental development which are attention, memory, visual, verbal and logic skills.

These insights (results) are compared with the results of all other users within your or your child’s age range so you can understand your abilities and work on the areas that need improvement.

Don’t forget to try MentalUP Intelligence Exercises for fun and effective mental exercises.

You can also take our online IQ test that our scientific app provides.

How to Test IQ?

So, what is an IQ test? An IQ test, which is also called an intelligence test among people, aims to express the intelligence potential of an individual numerically.

The unknown value in the formula of intelligence age/actual age x100 is the age of intelligence. The intelligence test determines this unknown value to complete the formula and sets a general IQ score regardless of age.

IQ test scores

The purpose of these tests is to guide people to increase their IQ scores by shaping their education according to IQ (intelligence).

IQ Score Table

The measure of an IQ test scale may vary depending on the test. Below is a table of the IQ test score classification of the Stanford-Binet Intelligence Scale:

IQ Score Correspondence
145 - 160 Very gifted or highly advanced
130 - 144 Gifted or very advanced
120 - 129 Superior
110 - 119 High average
90 - 109 Average
80 - 89 Low average
70 - 79 Borderline impaired or delayed
55 - 69 Mildly impaired or delayed
40 - 54 Moderately impaired or delayed

Where to Take An IQ Test & Intelligence Test?

Although intelligence quotient tests can be conducted in a collective environment, it is recommended that they are conducted in designated places to be applied in private areas first. Where and how to take the test depends on the type of intelligence quotient test.

Some intelligence quotient tests are practical, some are completely on paper. For example, cards and cubes are frequently used in performance tests. Therefore, the intelligence quotient test depends on which mental field is being tested or the type of test that is being administered.

IQ tests should be taken under the supervision of a specialist in a clinic if possible. The testing environment where the IQ test is conducted is really important and it is necessary to remove any distracting materials.

Children who take IQ tests must be focused on the test without any distractions. For instance, children should not feel hungry or be in need of going to the bathroom during the test.

You can find out more about the most popular intelligence tests in the world in the rest of the article, but these tests may also have sub-tests. Some IQ tests may require to test different variables such as visual, analytical and auditory IQ tests, and so on.

The MentalUP IQ test is one of the best and effective ways to evaluate your and your child’s mental abilities! As it measures attention, memory, visual, verbal and logic skills, it informs you of the areas that need improvement by comparing your results to millions of other users.

Take MentalUP’s IQ test!

Do IQ Tests Mean Intelligence Tests

There are various aspects of intelligence such as emotional and spiritual and IQ refers to our logical intelligence. Therefore, the term IQ will not be enough to reflect "the whole concept of intelligence".

We must remember that intelligence is a much broader concept than logical skills. For this reason, we would like to explain the terms of EQ and SQ in addition to IQ.

What does IQ stand for?

What Is EQ?

It means emotional intelligence. Individuals with high EQ use the right lobe of their brains better. They demonstrate very high verbal abilities. Also, our social relationships are directly proportional to EQ.

What Is SQ?

It means spiritual intelligence. It is described as the internal balance and spiritual intelligence of an individual. In fact, SQ can be considered as the sum of our IQ and EQ together. The development of SQ will also improve IQ and EQ in the same direction. SQ can be improved by solving verbal intelligence questions, which enables us to use both our imagination and verbal intelligence and activate the synapses in our brain.

The People Who Have the Highest IQ Scores in the World

American writer Marilyn vos Savant : 228

marilyn mos savant

Korean Physicist Kim ung-yong : 210

kim ung yong

British Physicist Isaac Newton : 190

isaac newton

French Writer Voltaire : 190


Russian World Chess Champion Kasparov : 190


Italian Scientist and Painter Leonardo da Vinci : 180

leonardo da vinci

Israel Prime Minister Netanyahu : 180

benjamin netanyahu

German Musician Goethe : 179


German Theologist Martin Luther : 170

martin luther

Italian Astronomer Galilei : 165

galilei galileo

German Musician Beethoven : 165


German Physicist Albert Einstein : 160

albert einstein

British PhysicistStephen Hawking : 160

stephen hawking

What Are the Most Popular IQ Tests

There are many different intelligence quotient tests available. We list the most popular ones for you below.

  • Stanford-Binet (SB-V): The Stanford-Binet IQ test measures the ability of verbal reasoning, abstract/visual reasoning, quantitative reasoning, and working memory.
  • Wechsler Adult Intelligence Scale (WAIS-IV): The IQ test consists of two main categories. The verbal part includes several types of tests to measure verbal reasoning, vocabulary ability, auditory perception and long-term memory. On the other hand, the performance category in this intelligence test covers visual attention, visual perception, and 3D perception.
  • Wechsler Intelligence Scale for Children (WISC-R) (ages 6 to16): It is similar to WAIS. The WISC includes questions for kids to understand easily.
  • Leiter International Performance Scale: Evaluates nonverbal cognitive abilities which make intelligence tests an ideal format for children with speech and hearing disorders.

Some of the tests are visual IQ tests or visual memory tests and some only measure kids or adult intelligence.

Cards and diagrams are the main tools for performance tests and children are expected to find the right answer from these cards or diagrams as quickly as possible. On the other hand, verbal intelligence tests measure linguistic ability. In reasoning ability tests, children are supposed to find the best solutions for the given cases.

In Which Cases Should An IQ Test Be Taken?

Intelligence tests are usually carried out for two different purposes, but can also be taken out of curiosity or for other reasons.

Case 1: An intelligence test is performed if the individual seems to be inadequate compared to his/her peers.

Case 2: An intelligence test is performed if the individual shows superior ability or superior intelligence potential compared to his/her peers.

If the IQ test is taken due to inadequacy, the following signs should be observed:

  • Having problems such as incompetence on academic performance, the inadequacy of literacy skills, and slow learning.
  • Feeling uncomfortable in a social environment, being in need of someone's assistance for personal care and needs.

If the individual is a gifted person, you may have observed some of the signs listed below:

  • Excessive curiosity, remembering everything precisely, learning and making plans quickly.
  • Having a very wide range of vocabulary, having full command of difficult concepts and terms, the obvious superiority of language skills compared to their peers.
  • Having a high level of imagination and creativity.
"Remember that the results of IQ tests may not always give a definite answer. Therefore, neither the confidence of parents in their children nor the confidence of children in themselves should be impaired."

With MentalUP, not only can you evaluate your and your children’s mental skills, but you can also benefit from 100+ games that will help improve them.

Don’t forget to take our online MentalUP IQ test and to visit MentalUP to discover the best games and activities that will contribute to the development of your and your children’s mental skills!

IQ tests are developed by a great number of researchers who are experts in the field of psychology and education. Despite all these studies, these intelligence tests may lose their currency and credibility. For this reason, even the most popular test may give a wrong result.

There are also some tests that are prepared by non-specialists and they might be non-official tests. Surely, accepting the results of these kinds of tests will not be fair while evaluating children's abilities. Do not forget that the main purpose of an IQ test is to support and lead children's development.

History of IQ Tests

You may be wondering “Who invented the IQ test anyway?”. The first time in history, dated around 2200 B.C., Chinese rulers selected their servants according to some examinations. The Ancient Egyptians also used similar kinds of methods.

However, the first studies of modern IQ tests began in the late 19th century. Alfred Binet and Theodore Simon developed a system for testing IQ in 1905. According to this system, the average intelligence scores of people within certain age groups were determined and the success of people has started to be evaluated based on these scores.

The term IQ (Intelligence Quotient) was named by German scientist L. Wilhelm Stern. The system Stern had developed was based on generating the score by calculating the ratio of mental age and physical age of the test maker. Modern intelligence quotient tests are still based on these variables. And the term “IQ” is still widely used.

FAQ (Frequently Asked Questions)

Here are the answers to the most asked questions about IQ.

What IQ Is Considered a Genius?

A score over 160 is considered a genius IQ.

Is 120 IQ Good?

The average score on an intelligence test is 100. As most people fall within the 90-109 range, an IQ score of 120 is above average.

Is IQ Genetic?

Yes, IQ can be affected by both genetic and environmental factors.

What Is the IQ of a Dog?

A dog’s IQ and mental ability are similar to a 2-year-old with Border Collie’s having the most intelligence.

Does Your IQ Change?

Yes, your IQ test scores can change over time. The most volatility in IQ scores is in childhood, mostly in adolescence, and it stabilizes as you get older.

Can IQ Be Increased?

There is research that suggests that it's possible to raise your intelligence through certain brain-training activities. Training your memory, executive control, and visuospatial reasoning can help you make your way up the IQ test scale.

MentalUP is one of the most effective ways that will help train the mind with cognitive exercises that will help improve both children’s and adults’ mental ability and intelligence.

What Was Einstein's IQ?

As we mentioned before, Albert Einstein’s IQ score was about 160 which is the highest score on the IQ test scale. However, did you know that he had Dyslexia (a specific learning disorder)?

Who Has the Highest IQ?

Ukrainian-American Psychiatrist William James Sidis is alleged to have had an IQ of 275. That is over the charts on the IQ test scale!

Now that you have learned everything you need to know about intelligence quotient tests, it’s time to test yourself and your children with a real intelligence test!

Take MentalUP’s free IQ test!

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