Myths & Fact Checks
Viral IQ claims checked against the record: where the number came from, who repeated it, and what is actually documented.
Army Alpha and Beta Tests: Scoring, Letter Grades and the Mental Age of 13 Myth
Army Alpha was a written group test of eight parts (maximum 212 points) and Army Beta its pictorial twin (maximum 118). The Army tested 1,726,966 men by January 1919, printed a mental age of 13.08 for white draftees, and then said it could not conclude the country was three years below the norm.
Depression Scales and High IQ: What a 2025 Study of Two US Cohorts Found
The questions on two common mental-health scales say less about depression the higher a person's intelligence score is. The authors conclude the scores are not comparable across IQ levels, so the debate over bright people and depression cannot be settled with them.
Does a Photographic Memory Mean a High IQ? What the Research Shows
Eidetic imagery is found in some children and almost no adults, and it is not photographic. World Memory Championship competitors scored high-average on IQ-type tests, and their feats came from a method anyone can learn.
IQ of Nobel Prize Winners: What Was Measured and What Was Guessed
Nobel week prompts lists of laureate IQs near 150 to 160. The measured record is a few childhood scores in the 120s, one 1953 test of 64 leading scientists, and a simulation showing why Terman's study could easily miss two future laureates.
Average IQ of College Students: Is It Really 115 or Higher?
A 2024 meta-analysis puts the average undergraduate near 102 on Wechsler tests, and a May 2026 conference poster reported means of 101 and 103. The old 115-to-130 figure traces back to the 1940s and 1950s, when only about one adult in twenty held a degree.
Are Night Owls Smarter? What the Chronotype Studies Show
The famous study behind the claim measured a vocabulary score in teenagers and self-reported bedtimes years later, and found a gap of about 7 minutes per 15 IQ points. Larger studies show a small link at most, and test timing can change a score more than chronotype does.
Which MBTI Type Has the Highest IQ? What the Studies Show
No MBTI IQ chart names a sample or test. The evidence points to a small edge for the Intuitive letter, tied to openness: 1,297 people on the KAIT, and 71.6% of 5,723 gifted teenagers, though the test's own manual links the edge to test content.
Do Twins Have Lower IQ Than Singletons? What the Data Shows
A UK cohort study once found twins scoring 5 to 6 points lower than singletons in childhood. A 2026 sibling-controlled study finds the gap has nearly closed — and reversed for one measure. That is a separate question from how heritable IQ is, which twin studies also answer.
Hamm v. Smith Decision: What the Court Left Open on Multiple IQ Scores
The Supreme Court took Hamm v. Smith to say how courts should weigh several IQ scores near 70, then dismissed it on 21 May 2026 without a holding. The opinions still lay out five scores, an SEM of 3 and two views of a lower bound of 69.
Is IQ Debunked? What Critics Get Right and Wrong
The score is stable, predicts exam results and survival, and is not debunked. What critics have challenged, with more success, is the idea that it is fixed, complete or explained by a single cause.
The Breakfast Question: Does the "But I Had Breakfast" Answer Reveal Low IQ?
A viral social-media test claims that answering a hypothetical breakfast question the wrong way proves low IQ. The claim traces to a single anonymous 2021 internet post with no named study behind it, though the psychology it distorts is real.
Zodiac Signs and IQ: Is Any Sign Actually Smarter?
No study has ever found a real link between star sign and measured intelligence. The pattern some people half-remember is either astrology's own vagueness at work, or a mix-up with a genuine, unrelated finding about relative age.
Is a 276 IQ Possible? YoungHoon Kim's Claim Checked
YoungHoon Kim's 276 is a perfect score on a 32-item, untimed online test, stated on a scale with a standard deviation of 24. On the usual scale it is 210, about 1 in 8.9 trillion, and no independent body has verified it.
Is the Dunning-Kruger Effect Real? What the IQ Data Actually Shows
In the famous 1999 study, students who scored at the 12th percentile guessed they ranked at the 62nd. When researchers later tested the effect against measured IQ, with statistics built to avoid a well-known trap, most of it disappeared. Not quite all of it.
The Left-Brain/Right-Brain Myth: What Brain Scans Actually Show
The idea that everyone leans on one dominant hemisphere — logical on the left, creative on the right — traces back to a real, Nobel Prize-winning discovery. It is not what that discovery found.
Most Intelligent AI Model in 2026? What the Rankings Actually Say
As of 14 October 2026 Claude Opus 5.5 leads one index, five models tie on another and GPT-6 Astra leads a third. OpenAI's 3 September claim that Astra is "the world's most intelligent" was fourth on the index in its own table.
Can Your IQ Change Over Time? What Retesting Shows
A Scottish cohort sat the same test at age 11 and again at 79, and the two sets of scores correlated at about 0.66. That single number refutes the claim that IQ is fixed and the claim that it is easily moved, because it is neither close to zero nor close to one.
Are Left-Handed People Smarter? What the Data Actually Shows
Pooled analyses of handedness and cognitive ability keep landing in the same place: an average difference near zero, small enough that no individual conclusion can be drawn from which hand someone writes with.
Does Birth Order Affect IQ? The Answer Is One Point, Maybe Two
Analyses that compare siblings inside the same family do find a firstborn advantage on measured intelligence — roughly one to two points on a mean-100, standard-deviation-15 scale. It is real, its size is disputed, and it is no larger than the error on a single test.
Does Music Raise IQ? What the Mozart Effect Study Actually Measured
The 1993 experiment behind three decades of "classical music makes babies smarter" ran for ten minutes, used college students, measured a single spatial task, and never mentioned IQ at all.
Celebrity IQ Figures: Almost None of Them Have a Source
The numbers attached to famous names travel for decades without ever acquiring a test record, a date or a scale. Where the trail can be followed at all, it usually ends at a magazine paragraph.
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