An IQ test with no sign up, and what it costs you

0 The short answer

Yes, a few IQ tests run with no account and no email, among them Mensa Norway's 35 puzzle visual pattern test and the OpenPsychometrics Full Scale IQ Test, but a test with no sign up buys you privacy from an account and not a score that is normed, saved or provable. What you give up is predictable: a result you can come back to, any way to resume a long session, norms matched to your age that the page explains, and any proof that the person who took the test was you. ACIS is not a no sign up test, because its free trial needs no card but does ask for an email address, so it sits on the other side of the line this page draws. The decisive limit is that unsupervised, short, anonymous tests give an indication, and the rest of this page shows how to read it.

1 What Does an IQ Test With No Sign Up Actually Mean?

A no sign up IQ test is one you can start and finish without creating an account, and that single feature says nothing about whether the test is normed, whether your answers are kept or whether you can find your result again. The searches that bring people here make three different promises. "No sign up" means no account. "Without email" means no address is requested, even for delivery of a result. "Without email or payment" adds a promise that nothing is charged, and the page on free versus validated IQ tests explains why a free result and a validated one are often different products.

Those are four separate questions, and a test can answer them differently. Does it ask you to create an account, with a password, before or after the items? Does it ask for an email address to deliver, save or unlock the result? Does it ask you to pay at the end, after you have already spent the time? And does it keep what you answered, and for what purpose? A site can say yes to any of these while advertising itself as free. The ACIS review of one long running site, IQTest.com, records that the free score there is delivered by email after you supply a name and an address, which is an ordinary arrangement but not a no sign up one.

The measurement literature has a name for a test with no registration. The International Test Commission wrote guidelines on computer based and internet delivered testing, published in 2006 in the International Journal of Testing. They define "open mode" as testing with no direct human supervision and therefore no means of authenticating who the test taker is, and they give internet tests without any requirement for registration as an example. One step up is "controlled mode," where no one supervises the session but the test is available only to known test takers, who obtain a username and password. In other words, registration is not an inconvenience that testing professionals invented. It is one way a test knows who sat it, and removing it moves the test toward the mode in which results are least trustworthy for anything that matters.

That does not make a no sign up test worthless. If you want to see what an IQ item feels like, or to satisfy curiosity on a lunch break, the missing account is a benefit, and many people searching these phrases want exactly that. The issue is what the number can then be used for. The same guidelines say that psychometric tests for post-sift selection testing or post-hire assessment would normally not be made available in open mode. A score from an open test is an indication for you, and it is not a document anyone else can rely on. The page on why no institution accepts an online IQ certificate takes up what follows from that when a site offers a certificate as the product.

2 Which IQ Tests Can You Take With No Account or Email?

Of the options an adult can actually use, three free sites let you start and finish with no account, one research instrument cannot be taken at all as a personal test, one family of sites asks for an email before the score, and the ACIS free trial asks for an email as well. The table compares them on the points that decide whether the number is useful. Everything about a third party comes from its own page, opened on October 29, 2026, and the cost column says only what the page we read said.

Read the table from the "Account or email" column inward. The three free sites that ask for nothing give up something else: none of the pages we read describes who the score is compared with, and none says that your result is saved to an account. That is consistent with what these sites are, which is a free service you open and close. The ACIS review of the OpenPsychometrics site covers the Full Scale IQ Test in more depth, and ACIS has a separate review of 123test. For the full range of ways to sit a test, including supervised ones, the page on every way to take an IQ test is the wider map, and it includes the professional route.

If you want the best free route and do not mind a cap on what it can show, the page on free IQ tests is the owner of that question on this site. If you want a score you can compare with an adult norm group and return to, the later rows are the candidates, and the page on the best online IQ tests compares them.

3 What Does Each No Sign Up Test Say It Does With Your Answers?

The three free sites differ most on one point that a visitor rarely checks, which is whether your answers are used afterward, and each says something different on its own page. We read the pages below on October 29, 2026. We quote only short phrases and describe the rest, and where a page was silent we say that we did not find the point, which is a statement about the text we read and not about the site.

Mensa Norway. The page titled "IQ Test Made by Mensa Norway" asks you to select an age range before the test starts. It says the test consists of 35 puzzles in the form of visual patterns that must be solved within a 25 minute time limit. Our arithmetic is that this allows about 43 seconds per puzzle if the time were divided evenly. On data, the page says the organization collects anonymised IQ test data for use in statistics, does not collect any personally identifiable information and does not use tracking. It adds that it calculates and stores technical fingerprints for automated protection. In plain terms, you are not asked who you are, the site keeps the answers in a form that does not name you, and it still keeps a technical marker to stop abuse. The page says the result is an IQ score between 85 and 145.

OpenPsychometrics. The test page is titled "Full Scale IQ Test." It says the test is meant to be taken solo, without references or materials, and that it was designed with a cap of 20 minutes. It also says that your responses may be recorded and anonymously used for research or otherwise distributed. The page we read did not ask for age, gender or country. The site's privacy policy, last updated on August 16, 2019, says that while a lot of data is collected and stored for scientific purposes, no attempt to track users will ever be made. It says that third parties on the site can tell that you visited and may use cookies, but do not have access to your questionnaire responses, with a stated exception for a third party survey provider. We did not find in the policy text a retention period or a route to ask for deletion of your answers.

123test. The IQ test page says "Instant results and no registration required." It says that completing a free test gives an IQ score estimate or the number of questions answered correctly, and that the professional version costs 12.99 dollars and has 25 or 44 questions. The demographic questions (gender, age, country and education) come after the test, and the page says not all of them are required. We tried two addresses for the company's privacy statement and neither opened, so we cannot say what it states about retention.

Three patterns follow. First, "no sign up" and "no data" are different things: two of the three sites say that your answers are recorded in some form, anonymously, for statistics or research. Second, only one of the three mentions a technical identifier. Third, retention is the point least documented in what we could read: we found no retention period in the OpenPsychometrics policy, and we could not open the 123test privacy statement. The Standards for Educational and Psychological Testing, which this page returns to in its last section, ask organizations that keep individually identifiable score information to have a documented retention policy that is available to the test taker. A site that keeps only anonymised answers has a fair argument that this does not apply to it. A site that stores your email next to your score is different, and the checklist further down covers it.

4 Why Can You Not Take the ICAR as a No Sign Up IQ Test?

The International Cognitive Ability Resource is a public domain item pool built for research, and it is not a personal IQ test: its project page says it is for academic use exclusively, that the materials are not for testing yourself, and that without norms an individual's IQ cannot be inferred. Some searchers arrive with "ICAR" in mind because its items are free and public. The page on the ICAR test covers what the ICAR 16 and ICAR 60 measure in detail. Here the question is narrower: can an adult sit it with no sign up and receive an IQ?

David Condon and William Revelle introduced the resource in a 2014 article in Intelligence, titled "The international cognitive ability resource: Development and initial validation of a public-domain measure." The title calls it a public domain measure. The project page at TU Dortmund, which carries no date and which we read on October 29, 2026, states that ICAR is intended for academic use exclusively. It says that use requires an academic affiliation and academic research, that commercial websites and commercial test products are not permitted, and that the materials are distributed at PsychArchives under a Scientific Use License 1. Asked whether people can use the materials to test themselves, the page answers no and points to an implementation of the ICAR 60 on a website hosted by the UK core ICAR team.

The sentence that matters most for this page is about scores. On the question of norms, the project page says there was no attempt to use existing data or to collect data specifically for that purpose, and that since there are no norms, you cannot infer an individual's IQ. The items are good for comparing groups of participants in a study. They were not calibrated to turn one person's raw count into a percentile among adults of their age.

Two practical consequences follow. First, a site that offers "the ICAR test" and returns an IQ number is attaching a scale that the project itself says does not exist, so the number is the site's own construction and should be read as such. Second, we could not establish from the pages we read whether the hosted implementation asks for an account or an email: its test list labels the ICAR 16 as an external test with a start button, and its privacy policy did not load as readable text when we tried. If privacy is your reason for avoiding an account, read that policy yourself before you begin. The page on what makes an IQ test scientific explains why research grade items and a usable personal score are separate achievements, and researchers who need a normed battery for participants have a different route, which is outside the scope of this page.

5 What Do You Give Up When There Is No Account?

Without an account you give up four things that a long or serious test depends on: saved progress, a result you can return to, a score matched to your age group and a record of who took it, and what you gain in exchange is speed and a smaller footprint. The trade is fair for a ten minute curiosity test and poor for anything longer.

Saved progress. A site with no account cannot know you again. If the browser closes, a battery restarts or the result is gone. The free tests described above are built around a single sitting, with limits of 20 or 25 minutes, so nothing is lost by that design. A test that takes hours cannot work this way. The ACIS Full Scale form takes about 175 minutes, which is why ACIS lets you take breaks, saves progress between subtests and allows 30 days to finish, and why that needs something to attach the saved state to. The page on what a short battery costs you takes the opposite view, asking what a 45 minute test cannot show, and the sibling page on untimed IQ tests covers the option for anyone who finds a 25 minute clock the main obstacle.

A result you can return to. A score that appears on a screen and then disappears is not a record. You can screenshot it, but no one, including you six months from now, can confirm what test produced it or whether it was altered. Some sites solve this with a link or by emailing the result, which brings the email back in.

Norms matched to your age. An IQ score is a comparison with a reference group. The Standards for Educational and Psychological Testing say in Standard 5.8 that norms should refer to clearly described populations and that users need to know the applicability of a test to different groups, and the comment names age groups among the differentiated norms that may be useful. The reason for age norms is empirical. Joshua Hartshorne and Laura Germine, in a 2015 study in Psychological Science, combined data from 48,537 online participants with normative data from standardized IQ and memory tests. They report considerable heterogeneity in when abilities peak: some peak around high school graduation, some plateau in early adulthood and begin to decline in the 30s, and others do not peak until the 40s or later. It follows, as our inference and not their conclusion, that a raw performance compared with a crowd of mixed ages means different things at 20 and at 50. Mensa Norway's page asks for an age range before the test, which fits an age based comparison, although the text we read does not say how the range is used. The OpenPsychometrics page we read asked for no age at all, and the page says nothing about age adjustment. The page on how IQ scores are normed explains what a norm group has to be for the number to mean what it says.

Proof of who took it. In the language of the International Test Commission, an open mode test cannot authenticate the test taker, and that is one practical reason an anonymous score is weak evidence for anyone else. If you only need the number for yourself, this costs you nothing. If someone else will rely on it, the test is the wrong tool whatever its quality.

What you gain is real. You start in seconds, you do not create a password, you do not receive marketing, and there is nothing to cancel. For a first look that is a good deal, and it explains why the searches in this page's title are so common.

6 Does a No Sign Up Test Give an Accurate Score?

A no sign up score can be a reasonable rough indication, but three limits that the missing account cannot fix cap its accuracy: you do not know who the score is compared with, no one standardizes the session and a short test carries a wide margin of error. The page on whether online IQ tests are accurate and the page on how to tell whether a score is real cover the general question. This section applies it to anonymous tests.

The reference group. Of the three free sites we read, none described in the text we saw who the score is compared with. Without that, the number's meaning rests on trust. Standard 5.8 of the Standards is the test: the norm group should be clearly described, and a user should be able to judge whether it fits.

The session. The Standards comment on Standard 3.4 says that unproctored test administrations, where standardization cannot be ensured, could provide an advantage to some test takers over others and that in these situations test results should be interpreted with caution. A phone in your hand, a television on, a friend looking over your shoulder and a search tab open are all conditions the designers cannot control. A supervised session standardizes the room, the sound and the timing, which is exactly what a home session gives up.

The margin. The Standards ask in Standard 2.13 that the standard error of measurement be given in the units of each reported score. A result page that shows a single number with no interval and no indication of reliability has not told you how far the number could move on another day. The page on reliability and validity explains why a score can be consistent without measuring what it claims to.

What the web evidence supports. Samuel Gosling and colleagues compared a sample of 361,703 internet respondents with 510 published traditional samples in a 2004 article in American Psychologist. They conclude that internet samples are relatively diverse and that internet findings are not adversely affected by nonserious or repeat responders. That is reassuring about web research on self report questionnaires, and it is the limit of the claim: the study evaluated questionnaires from self-selected samples, not timed ability tests, where a repeat attempt or a helper could matter more. The American Psychological Association's 2020 Guidelines for Psychological Assessment and Evaluation, in Guideline 15, say that the essential criteria for evaluating technology enhanced measures are reliability, validity and fairness. A no sign up test may meet them, but its page has to show it.

7 What Can a Short Visual Pattern Test Actually Measure?

A test built from visual pattern puzzles samples fluid reasoning, the Gf factor of the Cattell-Horn-Carroll model, and it cannot sample the other five broad abilities that a full battery reports, so a no sign up score describes one slice of ability and not general ability. The Mensa Norway page describes 35 puzzles in the form of visual patterns and calls the result an indication of general cognitive ability. In CHC terms, that format works mainly on Gf, and the page on fluid intelligence tests describes the task families that do the work (matrices, series completion, quantitative balance problems and analogies) and the narrow abilities of induction, general sequential reasoning and quantitative reasoning that sit under Gf. We describe formats here and never items.

The CHC model, covered on the page on how the CHC model is built, places a general factor at the top, broad abilities in the middle and narrow abilities below. A complete battery samples several broad abilities: Gc (crystallized knowledge, the verbal side), Gf, Gq (quantitative knowledge), Gv (visual processing), Gwm (working memory capacity) and Gs (processing speed). Two things follow for a one format test. A person who is strong in vocabulary and weaker in spatial puzzles will score differently on a pattern test than on a verbal one, which is not an error but a consequence of what was sampled. And the label "general cognitive ability" is a claim that the test developer has to support with evidence that the format tracks the broader factor. The page on what IQ measures explains how g and the broad abilities relate, and ACIS reports six of them as primary indices.

ACIS places its pattern format inside a larger fluid reasoning index. The ACIS page on the Matrix Reasoning subtest describes one of five subtests in the fluid reasoning index, next to Figure Weights, Visual Number Series, Logic Grid and Complex Relations, so a Matrix Reasoning result is read beside other fluid tasks and the other five indices. A reader who wants a quick fluid reasoning look and nothing else can choose a pattern test with no sign up and read its score accordingly. A reader who wants to know whether a pattern score fits the rest of their profile needs more than one format.

8 How Should You Read a Score From a No Sign Up Test?

Read it as an estimate on a scale with a mean of 100 and a standard deviation of 15, ask what range of the scale the test can show and treat any single number as a point inside a band you cannot see. The Mensa Norway page reports an IQ score between 85 and 145. On a normal curve with that mean and standard deviation, 85 is one standard deviation below the mean and 145 is three above. Our arithmetic is that these correspond to about the 16th and the 99.87th percentile. If that range is a floor and a ceiling, anyone whose true standing lies outside it would see the same end value, so a result of 145 on such a test would mean 145 or higher, and the page on measuring above the usual ceiling explains why telling high scores apart needs a different kind of test.

Two mix ups are common. The first is confusing a score with a percentile. The standard deviation of 15 is what ties them together, and the page on why the standard deviation is 15 and the page on the difference between an IQ score and a percentile show how to move between them. The tool for how rare a given IQ is does the arithmetic from score to rarity. The second is reading the number as fixed. An observed score is the true value plus error, and the error is larger for shorter tests.

The sibling page on tests with instant results covers what speed of delivery hides, and the point carries here: a result that arrives at once with no interval has been computed with the same ease as it was delivered.

9 What Should You Check Before a Test Asks for Your Email?

If a test asks for an email address, the useful question is not whether the site seems trustworthy but what the address will be attached to, and six checks answer that in about five minutes: what the address is for, whether your score is stored beside it, who else receives it, how long it is kept, how to have it deleted and whether you can use an address you can discard. None of this is specific to IQ tests, but a cognitive score next to an email address is a more personal pairing than an address next to a newsletter, and the professional standards say what responsible handling of it looks like.

The standards were written for organizations that hold test records, not for quiz sites, so they describe a benchmark and not a legal duty of every website. Standard 6.14 of the Standards for Educational and Psychological Testing says organizations that maintain individually identifiable test score information should develop a clear set of policy guidelines on how long records are retained and on how the data may be available and used over time for research or other purposes, that the policy should be documented and available to the test taker, and that data security should include administrative, technical and physical protections. Standard 6.16 asks that transmission of identified scores to authorized recipients protect their confidential nature. The ITC guidelines ask test publishers, in guideline 53, to inform test users of who has access to test data, for what purposes and how long the data will be stored electronically, and to follow country specific data protection laws. The APA's 2020 Guidelines for Psychological Assessment and Evaluation say in Guideline 17 that psychologists who use technology based assessment instruments are encouraged to take reasonable steps to ensure the security, transmission, storage and disposal of data.

The last row is our suggestion and not a standard. An address kept for sign ups, separate from your main inbox, limits what a marketing list can learn about you, and it is worth using when the site is unfamiliar. The trade is that you need to be able to receive the result there.

Two patterns deserve extra caution. The first is a test that asks for the address after you finish the items and before it shows the score, because you have then spent the time and the pressure to hand it over is highest. The second is a "free" result that leads to a trial which renews. The ACIS reviews of Innerly and of CogniProfile record trial prices that turn into monthly charges, and the page on how paid IQ tests bill explains the four billing models. The ACIS privacy policy is the place to read how this site handles an address, and it should be read the same way as any other.

Community threads are where many searchers meet this topic, and the "without email Reddit" variant of the query is one this page covers. A thread can tell you what other people did, but it cannot tell you a site's current terms, who its score is compared with or whether its privacy statement changed last month. Treat a recommendation as a lead, then open the site's own pages and apply the checks above.

10 What Conditions Does an Unsupervised Session Need?

An unsupervised session is only as clean as the room it is taken in, and because a no sign up test cannot be resumed, the whole attempt has to fit one quiet sitting on a device that will not interrupt it. The Standards comment on Standard 3.4, already cited, is the reason these conditions matter: unproctored administrations lose the control that a person in the room provides, so results should be interpreted with caution.

Set aside the full time before you start, which is 20 to 25 minutes for the two timed free tests above, plus a few minutes to read the instructions. Close other tabs and silence notifications, because a test clock does not pause for them. Use a screen large enough to see every item without scrolling mid item. If the test is timed, use a device and a connection you trust, since a page that stalls costs you seconds that the clock still counts. A timed test measures speed as well as accuracy, so the clock is part of the score. Do not search for answers or ask for help, which would make the number a measure of something else.

If you are taking a test alongside friends, take it separately and compare afterward. Two people at one table who talk during the items are no longer being measured independently, and the sibling page on IQ tests for friends explains what differences between friends' scores mean and do not mean.

For ACIS, three subtests present their items as audio and need working sound: Digit Span, Alphanumeric Sequencing and Arithmetic. Check your sound before you begin, use speakers or headphones that you can hear clearly and avoid noisy rooms. ACIS lets you take breaks and saves your progress between subtests, so there is no need to rush a long battery into one evening. The page on an adult normed cognitive ability test is the entry page for the ACIS battery.

11 Why Does the ACIS Free Trial Ask for an Email?

ACIS is not a no sign up test: its free trial needs no card, but it asks for an email address, and the reasons are tied to what a long battery needs, which is a place to keep your progress and a way to give each person one trial. We state this plainly because a reader who typed "iq test no sign up" should not find the opposite on a page that sells a test.

The facts, as read on the published ACIS site on October 29, 2026. The free trial needs no card. There is one free trial per person, and the site refuses a second trial from the same email address or the same browser. Started from the Full Scale form, the trial opens five subtests, and finished trial subtests are kept if you later unlock a form that includes them. The paid forms are one time payments with no subscription: Quick for 15 dollars, with 6 subtests in 3 domains and about 45 minutes; Optimized for 30 dollars, with 13 subtests in 5 domains and about 110 minutes; and Full Scale for 50 dollars, with all 20 subtests in six domains and about 175 minutes. Every form reports a Full Scale IQ with its 95 percent confidence interval. Prices can change, so read them on the home page before paying. The Custom Test costs 5 dollars per subtest, and at 10 subtests the Full Scale form costs the same.

Breaks are allowed, progress is saved between subtests and you have 30 days to complete. That is the account's job. A Full Scale session of about 175 minutes cannot depend on one uninterrupted browser tab, so the site has to recognize you when you return. The one trial per person is the second job: without an identifier, "one" cannot be enforced.

What the email does not do is replace the privacy checks above. The ACIS privacy policy is the document to read, and this page makes no claim about it beyond saying that it exists. The ACIS technical manual documents how the scores are built and is the place to look for the detail behind the report.

If you do not want to give an address, the honest alternative is to use a no sign up test for a first look and to come to ACIS only when you want a saved, age normed report. The page on IQ testing for adults helps you choose among the options.

12 Where ACIS Sits, and What a Buyer Should Do

ACIS is a normed online battery that needs an email and, in return, saves your progress and returns a Full Scale IQ with a 95 percent confidence interval, and its strengths and its limits are the same fact: it is online, unsupervised, not clinical and in English only, so it fits personal use and does not fit hiring, school accommodations or admission to a high IQ society. The prices above were read on October 29, 2026 and can change. ACIS sells the assessment this page recommends as one option among several, which is a commercial interest.

The Standards for Educational and Psychological Testing (AERA, APA and NCME, 2014) give the reading rules this page has applied. Standard 5.8 asks that norms refer to clearly described populations. Standard 2.13 asks for the standard error of measurement in the units of each reported score. The comment on Standard 3.4 says unproctored results should be interpreted with caution, and Standard 6.14 asks that retention and use of identifiable records be governed by a documented policy available to the test taker. The American Psychological Association's Guidelines for Psychological Assessment and Evaluation (2020) add, in Guidelines 15 and 17, that technology based measures are judged by reliability, validity and fairness and that data should be protected in storage, transmission and disposal. Applied to ACIS, that means a score should be read as a description of performance in one unsupervised session, and the technical manual and the example reports are where its interval and structure are documented. The manual also says that verbal and knowledge tasks are affected by English proficiency and educational exposure, which is part of why ACIS is English only.

A buyer should do four concrete things. First, decide whether you need a score you can keep. If not, a no sign up test is a fair first look, read with the checks in the table above. Second, if you want a saved report with an interval, open the example report for the form you are considering, which shows exactly what you would receive. Third, read the privacy policy of any site before you give an address, whether it is ACIS or another. Fourth, if you decide to try ACIS, start the free trial, which needs no card, and treat the five trial subtests as a first look at the format. The Full Scale form is the one that reports all six indices, and the guarantee reads, literally, "Full refund within 5 days if the report does not deliver the features described at checkout or a technical issue prevents you from accessing your results."

13 Sources Behind This Page

Every third party fact on this page comes from the documents below, opened or verified on October 29, 2026, and any figure we calculated ourselves is labeled in the text as our arithmetic. Where we read only an abstract, the entry says so. The OpenPsychometrics Full Scale IQ Test page and its privacy policy, and the 123test IQ test page, were also read on October 29, 2026, and are described in the text from their own pages. As competing products they are named without links and are not used as sources about intelligence. Prices and policies on commercial pages change, so check the page before you act.

1. American Educational Research Association, American Psychological Association, and National Council on Measurement in Education (2014). Standards for Educational and Psychological Testing. Washington, DC: AERA. Standards 2.13, 3.4 and its comment, 5.8 and its comment, 6.14 and 6.16 and their comments. Open access edition: https://www.testingstandards.net/open-access-files.html
2. American Psychological Association (2020). APA Guidelines for Psychological Assessment and Evaluation. Approved by the APA Council of Representatives, March 2020. Guidelines 15 and 17. https://www.apa.org/about/policy/guidelines-psychological-assessment-evaluation.pdf
3. International Test Commission (2006). International guidelines on computer-based and internet-delivered testing. International Journal of Testing, 6(2), 143 to 171. The text read was the ITC guidelines document, version 1.0, July 2005. https://doi.org/10.1207/s15327574ijt0602_4
4. Condon, D. M., and Revelle, W. (2014). The international cognitive ability resource: Development and initial validation of a public-domain measure. Intelligence, 43, 52 to 64. Record verified through Crossref; only the title and venue are used. https://doi.org/10.1016/j.intell.2014.01.004
5. TU Dortmund, Department of Statistics (undated). The International Cognitive Ability Resource (ICAR), project page. Read on October 29, 2026. https://sms.statistik.tu-dortmund.de/en/research/projects/completed-research-projects/international-cognitive-ability-resource-icar/
6. Hartshorne, J. K., and Germine, L. T. (2015). When does cognitive functioning peak? The asynchronous rise and fall of different cognitive abilities across the life span. Psychological Science, 26(4), 433 to 443. Abstract read through PubMed. https://doi.org/10.1177/0956797614567339
7. Gosling, S. D., Vazire, S., Srivastava, S., and John, O. P. (2004). Should we trust web-based studies? A comparative analysis of six preconceptions about internet questionnaires. American Psychologist, 59(2), 93 to 104. Abstract read through PubMed. https://doi.org/10.1037/0003-066X.59.2.93
8. Mensa Norway. IQ Test Made by Mensa Norway, test page. Read on October 29, 2026. https://test.mensa.no/Home/Test/en-US

14 Frequently Asked Questions