IQTest.com has operated for many years and offers a general result before selling a Complete Intelligence Profile. Longevity and a polished report are useful signals, but they do not replace current norms, reliability and independent validity evidence.
IQTest.com evaluated by separating its free general result from the paid Complete Intelligence Profile.
0 The Short Answer
IQTest.com is one of the oldest surviving IQ test sites on the public web, and its commercial model is cleaner than almost everything competing with it. The score costs nothing. The detailed report is a single purchase, listed at $19.95 on the official IQTest.com shop when we checked in August 2026, rather than a recurring charge dressed up as a one dollar trial. In a category where the standard trick is to hold a finished score hostage behind a subscription that renews monthly until you find the cancellation link, a flat one time price is a real advantage and deserves to be named as one.
The weakness sits somewhere else entirely, and it is a documentation weakness rather than a pricing one. We could not locate a public technical manual for the IQTest.com instrument: no norm sample description, no reliability coefficients, no standard error of measurement, no factor analysis behind the thirteen ability labels the paid report is built around. That is a statement about what is findable on the public site in August 2026, not an accusation that no such work exists privately. But a buyer can only evaluate what a buyer can read, and what a buyer can read here is a marketing description of the product, not the evidence behind the number.
So the honest summary runs in two directions at once. If you want a free number in fifteen minutes from a site that has been at the same address since the Clinton administration, and you are comfortable treating that number as a rough indicator, IQTest.com is a reasonable place to get one, and the paid upsell will not quietly bill you again next month. If you want a score you can defend, compare against a described population, or attach a confidence interval to, the public material does not currently support that use, and no amount of site longevity substitutes for a norms table.
Who wrote this and why that matters
This review was written by the team behind ACIS, which sells a competing assessment. Read it as an informed competitor's evaluation rather than a neutral third party audit. Everything here is checkable: we describe only what IQTest.com publishes publicly, we date every price and figure, and we link to the pages we used so you can confirm each claim yourself. Where we say something is missing, we mean we could not find it in public, and we say so in those words.
1 What IQTest.com Actually Sells
The product is split in two, and understanding the split is most of understanding the company. Part one is a free test that returns a general IQ figure. You answer the items, you enter a name and an email address, and the score arrives by email. Part two is the Complete Intelligence Profile, a paid document that expands that single figure into what the site describes as written explanations of your performance across thirteen individual areas of intelligence, packaged with a Certificate of Intelligence.
This is the classic freemium structure for consumer assessment, and it is worth being precise about which half is the business. The free number is the hook, and it is genuinely free in the sense that matters: you receive an actual score without paying. What the money buys is interpretation and presentation, not access to a result you already earned. That distinction sounds small until you compare it against the competing pattern, where the test is free to take, the score is computed, and then a paywall appears between you and the number you just generated. IQTest.com does not do that, and the difference is meaningful to anyone who has been on the wrong side of it.
The site positions itself with confidence. Its homepage carries the tagline "The Original Free Online IQ Test," and its public copy describes the instrument as the most scientifically valid free IQ test available online today, developed by PhDs and statistically sound, previously offered only to corporations, schools and certified professional applications. Those are marketing claims made by the vendor about the vendor, which is normal and not in itself a criticism. They become relevant later in this review, because claims of that strength are exactly the ones a technical manual would ordinarily support, and the manual is the thing we could not find.
One useful frame before going further: every online assessment is really three products bundled together, an item set, a scoring model, and a report. Buyers usually evaluate only the third, because the report is the part they can see. The rest of this page pulls the three apart for IQTest.com specifically, and the same separation works on any test you are considering, including the other options in this category.
2 Inside the Test: 38 True or False Items on a Clock
According to the IQTest.com FAQ, the test consists of 38 true or false questions spread across a few pages, it is timed, and the average test taker finishes in roughly thirteen minutes. The same page states that the instrument is designed for native English speaking adults, and that validity decreases somewhat for people who do not speak English well and for people under sixteen years of age. That disclosure is a statement about language loading, and the long standing response to it is the culture-fair tradition running from Raven's Progressive Matrices in 1936 to Cattell's Culture Fair Intelligence Test in 1949, both built from abstract figures instead of words, though neither one removes cultural influence entirely.
Give the site credit for that last disclosure, because most consumer tests skip it. Stating a target population and admitting where the instrument weakens is elementary good practice and a surprising number of competitors never do it. A test that tells you who it was built for is more usable than one that implies it works equally well for everybody, which no test does.
Now the design itself. Thirty eight items is short for a full scale estimate, and the true or false response format compounds the shortness in a specific way. With two options per item, a person who knows nothing still expects to get about half of them right by chance alone. Guessing variance eats into the information each item carries, which is why professional batteries lean on multiple choice with four or more distractors, free response, and performance tasks rather than binary judgments. A binary item set can absolutely measure something real, but it needs more items than a four option set to reach the same precision, not fewer.
There is also a breadth question. A single continuous block of verbal true or false statements samples a narrow slice of the cognitive terrain. Verbal comprehension and elements of quantitative reasoning travel well in that format. Visual spatial processing, processing speed as a separate construct, and working memory span do not, because they require task types that a true or false prompt cannot produce. This matters directly for the paid report, which promises thirteen distinguishable areas of performance. Thirteen scores extracted from 38 binary items means roughly three items behind each label, and three items is not enough to support a stable subscore under any reliability model we are aware of. That is arithmetic on the vendor's own published numbers, not a hidden finding, and it is the single most useful thing a prospective buyer can know before paying.
3 The Timing Rule and What It Does to Your Score
One published detail deserves its own section because it changes how the resulting number should be read. The IQTest.com FAQ states plainly that finishing the test in less than thirteen minutes will raise your score and taking longer will lower it. The clock is not just a cap. It is an input to the scoring model. Speed as a scored component is ordinary in hiring assessment, where the Wonderlic and the CCAT pack 50 items into 12 and 15 minutes respectively and are designed so that almost nobody finishes; what is less ordinary is a consumer product publishing the rule at all.
Speed weighted scoring is a legitimate design choice with a long history. Many professional subtests award bonus points for rapid completion, and processing speed is a genuine cognitive domain with its own factor loading. The consequence, though, is that the output is a blended measure of accuracy and speed rather than a pure power score, and the two behave differently. Accuracy under unlimited time and accuracy under time pressure correlate strongly but not identically, and the gap widens for older test takers, for people working on unfamiliar devices, and for anyone reading in a second language. The FAQ already flags the language issue. The timing rule quietly amplifies it, because a reader who processes English a little more slowly loses points twice, once on comprehension and once on the clock.
The practical reading instruction follows directly. A result from a speed weighted instrument is a snapshot of performance under time pressure on one particular day, on one particular device, in one particular state of alertness. It is not a stable trait estimate, and it will move more between sittings than an untimed score would. If your number came back lower than you expected and you completed the test slowly, part of the difference may be the timing rule rather than the reasoning, and there is no published way to separate the two from the score alone.
The deeper point generalizes past this one site. Whenever a test tells you that speed affects the score, ask how much. A defensible answer looks like a documented weighting, a stated ceiling on time bonuses, and reliability figures computed under the actual timing conditions. We could not find any of that published for IQTest.com, which means the size of the speed component is unknown to the buyer, even though its existence is disclosed.
4 The Price, the Model, and Why One Time Matters
As of August 2026, the Complete Intelligence Profile was listed at $19.95 on the official IQTest.com shop, presented as a single product rather than a plan. The company reinforces this publicly: in replies to reviewers on Trustpilot, IQTest.com states that it does not apply recurring charges and that a purchase is a one time charge of $19.95. Prices and terms change without notice, so treat that figure as a dated observation and treat the live checkout page as the only authority on what you will actually be billed.
One inconsistency is worth flagging because you may encounter it and wonder. Different pages on the site have carried different figures: the shop and the site's own explainer post list $19.95, while a sample result page we found listed $14.95. There are innocent explanations, including old pages that were never updated and different products sharing similar layouts. Either way, the rule for buyers is the same one that applies everywhere: the number on the checkout screen at the moment of payment is the number that governs, and any figure in an article, including this one, is a historical note.
The pricing model is where IQTest.com separates itself from most of its competition, so here is the landscape it sits inside.
One time purchase
You pay a fixed amount once and own the report. Total cost is knowable in advance and no cancellation step exists because there is nothing to cancel. This is the model IQTest.com uses.
Recurring subscription
Access to your own result depends on an active plan. The advertised entry price is rarely the annual cost, and leaving requires finding and completing a cancellation flow.
Low cost trial that converts
A small charge unlocks the score and silently starts a plan that renews at a much higher rate. This is the structure behind most billing disputes in the consumer testing category.
Judged on this axis alone, IQTest.com is on the buyer friendly end. Twenty dollars for a report is not cheap relative to the item count behind it, and we argue below that the report cannot carry the interpretive weight it promises, but the transaction itself is honest in shape: one price, one charge, no clock running in the background. When you compare tests, price the model and not just the number, because a $1 trial is frequently the most expensive option on the table.
5 What the Paid Report Contains and How to Read Its Labels
The Complete Intelligence Profile is described by IQTest.com as a thirteen part analysis, with written explanations of your score in each of the test's thirteen individual areas of intelligence, plus a Certificate of Intelligence. For a curious reader, that is a more satisfying object than a bare number, and there is nothing wrong with wanting an explanation of your own result. Narrative interpretation has genuine value even when its statistical foundations are thin, in the same way a well written horoscope can prompt useful self reflection without being astronomy.
The question a careful buyer should ask is what the thirteen labels are, in a measurement sense. A label in a report becomes a cognitive domain only when two conditions hold: the items behind it were designed to sample that construct specifically, and factor analysis on a real sample shows the resulting scores separating the way the labels claim. Without both, thirteen headings are thirteen ways of slicing one underlying score, and the apparent profile of strengths and weaknesses is mostly measurement noise wearing a chart.
Recall the arithmetic from earlier: 38 binary items divided across thirteen areas. Even under generous assumptions about item overlap, subscores built on that few observations swing widely between sittings, which is precisely why professional batteries use eight to fifteen subtests of many items each to produce five or six index scores rather than thirteen. The established structure of human cognitive ability, worked out over decades of factor analytic research and organized in the Cattell Horn Carroll framework, does not naturally yield thirteen coequal, separately measurable abilities at the level a fifteen minute test can reach. It yields a general factor plus a handful of broad domains: verbal comprehension, fluid reasoning, visual spatial processing, working memory, processing speed, quantitative reasoning. If you want the longer version of why those groupings exist, our explainer on what an IQ test actually measures covers it.
None of this means the report is worthless. It means the correct way to read it is as a description of one performance, phrased thirteen ways, rather than as a diagnostic map of your mind. Enjoy the narrative. Do not make decisions off the peaks and valleys inside it, because the public evidence does not establish that those peaks and valleys are real.
6 Norms: The Missing Piece That Makes a Score a Score
An IQ number is not a measurement of a thing. It is a position in a distribution. Saying someone scored 122 means nothing at all until you can answer the question "compared with whom," because the entire content of the number is the comparison. That is why norm sample documentation is the first item any evaluator looks for, and why its absence is the most consequential gap a consumer test can have.
We could not locate a public norm sample description for the IQTest.com instrument: no account of who was tested to build the reference distribution, how many people, in what years, recruited how, or whether the comparison is against the general population or against the self selected group of people who found an IQ website and chose to take a test on it. That last distinction is not academic. Voluntary online test takers are not a random sample of humanity, and a distribution built from them sits in a different place than a census matched one.
Norms also age, and they age in a measurable direction. The meta-analysis by Trahan, Stuebing, Fletcher and Hiscock, published in Psychological Bulletin in 2014, put the Flynn effect at roughly 2.93 IQ points per decade across modern Stanford Binet and Wechsler comparisons. Run that forward and the implication is blunt: a score computed against norms gathered twenty years ago is inflated by roughly six points relative to a current reference group, through no fault of the person taking it. Professional publishers handle this by restandardizing every ten to fifteen years and dating every norms table. Without a publication date on the norms, a buyer cannot even estimate the size of the drift. We wrote separately about why norms age and what it does to scores, and it applies to every test on the market, not just this one.
To be exact about the claim being made here: we are saying that a public norm sample description was not findable, in August 2026, on the pages IQTest.com publishes. We are not saying no norming was performed. The distinction matters, and it is the same distinction we would want applied to us.
7 Reliability, Error Bars, and What a Technical Manual Publishes
Every measurement carries error, and serious instruments quantify theirs rather than hiding it. The Wechsler Adult Intelligence Scale, Fourth Edition, reports a Full Scale IQ internal consistency reliability near .98 in its standardization sample, which yields a standard error of measurement of roughly 2.2 points and a 95 percent confidence interval of about plus or minus four points around any observed score. That is why competent reports read "observed Full Scale IQ 114, 95 percent confidence interval 110 to 118" instead of "your IQ is 114." The interval is not hedging. It is the honest content of the measurement.
We could not find published reliability coefficients, standard error figures, or retest data for the IQTest.com instrument. In practice that means a buyer receiving a specific number has no published basis for knowing whether the interval around it is four points wide or fifteen. Given a 38 item binary test with a speed component, a wider band is the reasonable prior, but a prior is not a measurement, and we will not invent one.
Retest behavior is a second gap with practical consequences. The meta-analysis by Calamia, Markon and Tranel, published in The Clinical Neuropsychologist in 2012, found average practice gains of about a quarter of a standard deviation across nearly 1,600 effect sizes, roughly three to four IQ points, with gains around twice as large when the identical form is reused rather than a parallel one. A site that presents a single fixed item set and permits repeat attempts is exposed to the larger of those two effects, and a buyer who retakes it will very likely improve for reasons that have nothing to do with improved reasoning.
Here is the concrete checklist. These six items are what a published technical manual contains, and you can run this list against any test you are considering, in about five minutes each.
Norm sample
Size, collection years, recruitment method, age bands, and how closely the sample matches the population it claims to represent.
Reliability coefficients
Internal consistency for the total score and every subscore, reported per age band rather than as one global figure.
Standard error of measurement
The width of the confidence band, so a single number can be reported as a range instead of a false point estimate.
Factor structure
Evidence that the reported domains separate empirically, rather than being editorial headings placed over one general score.
Ceiling and floor
The highest and lowest scores the instrument can resolve, and where measurement stops being meaningful at the extremes.
Retest and stability
How much scores move on a second administration, at what interval, and with which form, so repeat results can be interpreted.
The framework behind that list is not our invention. It follows the Standards for Educational and Psychological Testing, published jointly by the American Educational Research Association, the American Psychological Association and the National Council on Measurement in Education, whose current edition dates to 2014. Consumer web tests are not bound by it, but it remains the yardstick, and a test that meets none of its documentation expectations should be read accordingly.
8 Thirty Years Online: What Longevity Does and Does Not Prove
Public WHOIS records list the iqtest.com domain as created on March 12, 1996, which makes it about thirty years old as of August 2026 and places it among the earliest IQ test properties on the consumer web. That is not nothing. Surviving three decades of platform shifts, payment processor changes and search algorithm rewrites requires a business that keeps its promises often enough to keep operating, and the same registration continuously held for that long is a real signal of stability.
Longevity establishes commercial durability. It does not establish measurement validity, and the two get conflated constantly in this category. A test built in the late 1990s and left largely unchanged faces three specific problems that age creates rather than cures. Its norms drift further from the current population every year, at roughly the rate the Flynn effect research describes. Its items become progressively more searchable, since a fixed 38 item set that has been online for decades is discoverable by anyone who wants to look. And its assumptions about the testing environment, a desktop computer, a quiet room, an undistracted reader, describe a session that has almost nothing in common with a phone screen on a commuter train.
The strongest honest formulation is this. IQTest.com's age is excellent evidence that the company is real, reachable, and not a fly by night operation that will vanish with your twenty dollars. It is not evidence about the properties of the score, in either direction. Those two questions have separate answers and separate kinds of evidence behind them, and a buyer who lets the first one settle the second is making the most common error in this market. For the general version of that argument, see our piece on what makes an IQ test accurate.
9 What Public Reviewers Say, and the Name Confusion Problem
On the Trustpilot page for iqtest.com, the site carried a TrustScore of 1.8 out of 5 from 113 reviews when we looked in August 2026, with about 63 percent of reviews at one star and about 15 percent at five stars. Reviewers there describe billing frustrations, including difficulty cancelling charges they believed were recurring, and some report unsatisfying refund experiences. Those are user reports on a third party platform, not findings of ours, and we present them as exactly that.
The company's public replies push back on a specific and checkable point, and fairness requires reporting it with equal prominence. IQTest.com states in those replies that it applies no recurring charges, that any purchase is a one time charge of $19.95, that the free score requires no payment at all, and that accounts can be deleted on request. It further notes that many websites carry "iqtest" inside their names, and that a single extra letter, digit, dash, underscore character or dot produces an entirely different company.
That last point is worth taking seriously rather than treating as deflection, because the category really is a minefield of near identical names, and subscription traps are genuinely common among the neighbors. A reviewer who paid a lookalike site and later searched for "iqtest" to leave a complaint could easily land on the wrong review page. We cannot adjudicate individual disputes from the outside, and we will not try. What we can say is that the billing model IQTest.com describes in those replies matches what its own shop page displays, which is the sort of internal consistency that is easy to check and easy to fail.
The general lesson for readers is procedural. Before paying any online test, confirm the exact domain in the address bar, screenshot the checkout page showing the total and the terms, and keep the payment confirmation email. Two minutes of documentation resolves nearly every dispute in this category, whichever company it involves, and it protects you against the far more numerous sites that do run conversion traps.
10 Data, Email and What You Hand Over
The free score is delivered by email, which means the transaction is not actually free in the strict sense: you exchange a name and a working email address for the number. That is an ordinary arrangement and not a criticism by itself, but it should be a conscious trade rather than a reflex, because an email address attached to a cognitive score is a more sensitive pairing than an email address attached to a newsletter.
Before entering it, a buyer should be able to answer four questions from the site's own published policies: how long item responses and scores are retained, whether any of it is shared with third parties or advertising partners, who processes the payment and what card data touches the vendor's systems, and how to request deletion of the account and its associated records. IQTest.com's public replies to reviewers indicate that accounts can be deleted on request, which addresses part of the last question. The rest should be verified against the current privacy policy on the site at the time you take the test, because policies get revised and a review published in August 2026 cannot vouch for a document that may change next quarter.
There is also a quieter consideration specific to cognitive testing. A score you dislike is difficult to un-see, and a score you like is easy to over-trust. Handing a permanent identifier to a service that will hold a number about your reasoning is a small decision with a long tail. It is worth making deliberately, and it is worth doing on a test whose scoring you have reason to believe in, which is why the documentation questions in the preceding sections come before this one rather than after.
11 Strengths and Limitations Side by Side
We do not publish numeric ratings, because a number like "the documented evidence" implies a scoring rubric the reader can inspect and re-derive, and without that rubric printed in full the number is decoration. What follows instead is every strength and every limitation we can support from public material, stated plainly enough that you can check each row yourself.
Strengths we can verify
Limitations we can document
One time pricing. The paid report was listed at $19.95 as a single purchase in August 2026, with no plan attached, in a category where recurring billing is the norm.
No public norm sample. We could not find who the comparison group is, how large it was, or when it was collected, which leaves the score's reference point undefined for buyers.
The score itself is free. A number is delivered without payment, so the purchase decision happens after you already hold the result rather than as a condition of seeing it.
No published reliability or error figures. Without a standard error, a specific number cannot honestly be reported as a range, and every score is a point estimate of unknown width.
Thirty years at the same address. Domain records show continuous registration since March 1996, evidence of a durable operator rather than a disposable landing page.
Thirteen subscores from 38 binary items. The item budget behind each reported area is too small to support a stable profile, on the vendor's own published counts.
Population disclosure. The FAQ states the test targets native English speaking adults and that validity decreases for weaker English speakers and under sixteens, which many competitors never admit.
Undisclosed speed weighting. Timing is confirmed to move the score up or down, but the magnitude of that adjustment is not published, so the speed component cannot be separated from the reasoning component.
Consistent public account of billing. The company's replies to reviewers describe the same one time charge its shop page displays, which is an internally checkable claim.
Fixed, long exposed item set. A 38 item test online for decades is exposed to retest gains of roughly three to four points and to items being findable outside the test.
Read the two columns as answering different questions. The left column is about the company and the commercial deal, and on that question IQTest.com performs better than most of its neighbors. The right column is about the instrument and the number, and on that question the public record is thin. A buyer who wants the first thing will be satisfied. A buyer who wants the second thing should keep looking, here or anywhere else, until someone shows them a norms table.
12 Who It Fits, Who It Does Not, and Where ACIS Sits
IQTest.com fits a reader who wants a fast, free, no-strings number out of curiosity, who intends to treat it as entertainment with a statistical flavor, and who would rather buy a twenty dollar report outright than sign up for anything. If that is you, the deal is fair and the risk of an unwanted recurring charge appears low based on what the company publishes about its own billing. If you are comparing options in this price range, our reviews of MyIQ and the free Open Psychometrics battery show what the alternatives publish and what they withhold.
It does not fit anyone whose next step depends on the result. Gifted program applications, professional selection, clinical questions about learning or attention, disability determinations and high IQ society admission all require a supervised administration of a documented battery, and none of them accept an unproctored web score. If that is your situation, the money is better spent on a psychologist than on any online report, ours included. Our comparison of proctored professional testing against online testing lays out where the line falls and why it exists.
Since we are a competitor, here is our own position stated with its limits attached. ACIS is an online self assessment. It is not a clinical evaluation, it is not diagnostic, and it is not administered by a psychologist, so it carries every constraint that applies to unproctored testing. What differs is documentation and structure: ACIS administers 20 subtests mapped to the six broad Cattell Horn Carroll domains, reports a profile with intervals across those domains rather than one bare figure, and publishes a technical manual describing where its norms come from and how they were built, so you can read the basis of the score before deciding what it is worth. Whether that is worth your time is your call, and the manual is there to be argued with, which is the point.
If you want to see the difference between a single number and a documented domain profile, the fastest way is to look at one. Either way, the reading skill this page has been teaching, ask for the norms, ask for the error bars, ask what the labels are built from, is the part worth keeping, and it works on us as well as on anyone else. It also travels: apply it while reading about what counts as a good score or while checking any percentile conversion table, and you will notice how few sources can answer those questions about their own numbers.
The general score is, and it arrives by email at no charge. What costs money is the Complete Intelligence Profile, an optional expanded document. You are never blocked from your own number by a paywall.
How much does the Complete Intelligence Profile cost?
The official shop listed it at $19.95 in August 2026. Other pages on the site have shown different figures, so confirm the total on the checkout screen before paying.
Is it a subscription?
The shop presents a single product, and the company states in public replies to reviewers that purchases carry no recurring component. Screenshot your checkout page anyway as a record.
How long does the test take?
The FAQ puts the average completion time at about thirteen minutes for 38 true or false items. Budget a quarter hour and take it somewhere without interruptions.
Does finishing faster really change my result?
The site says yes: finishing under thirteen minutes raises the score and running longer lowers it. How much weight speed carries is not published, so the size of the adjustment is unknown to you.
Is IQTest.com accurate?
Accuracy claims need norms, reliability figures and error bands to be checkable, and we could not find those published. Treat the output as a rough indicator rather than a measured quantity.
Can I use the result for a gifted program or Mensa?
No. Selective programs and high IQ societies accept supervised administrations of specific documented batteries. An unproctored web score does not qualify anywhere we are aware of.
How old is the site?
Domain records show the address registered in March 1996, making it roughly thirty years old. That speaks to business durability, not to the properties of the score it produces.
Does being old make a test better?
Not by itself. An unchanged instrument accumulates problems over time, because reference groups shift and a fixed item set becomes progressively more exposed to people who have seen it.
What are the thirteen areas in the paid report?
The site describes thirteen individual areas of intelligence with written explanations for each. It does not publish the factor analysis showing those areas separate empirically, so read them as descriptive headings.
Why does the item count matter so much?
Precision scales with observations. Splitting 38 binary items thirteen ways leaves very few behind each heading, and subscores built that thinly move a lot between sittings.
Do I have to give my email address?
Yes, the score is delivered by email after you supply a name and address. Decide in advance whether you want a cognitive result tied to an identifier you use elsewhere.
Can I delete my data afterwards?
The company has stated publicly that accounts can be deleted on request. Verify the retention and deletion terms in the current privacy policy before you take the test rather than after.
What do the Trustpilot reviews show?
A TrustScore of 1.8 out of 5 across 113 reviews in August 2026, skewed heavily toward one star. Read the company replies alongside them, since several disputes appear to involve similarly named sites.
Why are so many IQ sites confusable with each other?
Because the search terms are valuable and the names are close. A dash, a dot or one extra character produces a completely different operator with completely different billing terms.
Will my score go up if I take it twice?
Probably, and mostly for uninteresting reasons. Repeating an identical form typically produces gains of several points from familiarity alone, which is not the same as improved reasoning.
Is a true or false format a problem?
It is a constraint rather than a flaw. Two options mean chance alone gets you about half, so binary items carry less information each and need greater numbers to reach a given precision.
Does the test work for non-native English speakers?
The site itself says validity decreases for people who do not speak English well and for under sixteens. Credit them for the disclosure and factor it into how you read your own result.
What would change this assessment?
Publication of a norms table with collection dates, reliability coefficients with standard errors, and factor evidence for the thirteen areas. Any of those appearing publicly would move our conclusions immediately.
Is ACIS recommending against IQTest.com?
We sell a competing product, so weigh our view accordingly. Our position is narrower than a recommendation: the commercial terms look fair, and the psychometric documentation is not public.
What should I check before paying for any online IQ report?
Look for a sample report, the exact charge and whether it repeats, a dated norms description, published error figures, a refund policy in writing, and confirmation you are on the domain you think you are.
14 Sources Behind This Page
A review is only as good as the yardstick behind it. These sources document the measurement standards this review applies and the consumer practices it checks for.
American Psychological Association. The Standards for Educational and Psychological Testing, the joint AERA, APA and NCME framework that legitimate tests are built and evaluated against.
Buros Center for Testing. The independent center whose Mental Measurements Yearbook has reviewed commercial tests since 1938. The reference point for claims about test quality.
American Psychological Association. Understanding psychological testing and assessment. What professionally administered testing involves and how it differs from informal quizzes.
Federal Trade Commission (2022). Bringing Dark Patterns to Light. The FTC staff report on design practices that obscure subscriptions and charges, worth checking any paid online test against.
Pearson Clinical Assessment Scientific Council (2023). Standardized Clinical Assessment for Practitioners: A Primer. How standard scores, percentile ranks and the standard error of measurement are meant to be read together.
Pearson (2008). WAIS-IV Score Report sample. What a real report contains: every composite paired with a percentile rank, a 95% confidence interval and a qualitative description, never a bare number.
Crawford, J.R., Garthwaite, P.H. & Slick, D.J. (2009). On percentile norms in neuropsychology. The Clinical Neuropsychologist, 23(7), 1173-1195. Three definitions of a percentile coexist in practice and can return different results for the same score.
Voncken, L., Albers, C.J. & Timmerman, M.E. (2019). Improving confidence intervals for normed test scores. Behavior Research Methods. Open access. Documents the mean 100, SD 15 metric and the uncertainty that norming from samples adds to any score.
Pearson (2024). WAIS-5, Wechsler Adult Intelligence Scale, Fifth Edition. The current adult battery, covering ages 16:0 to 90:11 across five cognitive domains.
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ACIS measures six CHC domains across 20 subtests and reports each one with its own normed score and confidence interval, so you can see where you are strong and where you are not.
