IIF Certified Assessment
Start IQ Test
IIF Certified Assessment
James has a documented, verified and genuinely remarkable memory for basketball. Every number attached to his name is the result of that being renamed as something it is not.
The recall is real and verified, but it is recall of meaningful basketball patterns, which is the textbook signature of trained domain expertise rather than general memory capacity. James went straight from high school to the NBA, so there is no academic record to triangulate against, and the band is wide accordingly.
Set the claim aside for a moment. If someone genuinely scored in this range, here is what that would represent.
Average is 100 by construction, and about two-thirds of people fall between 85 and 115. Take the test to place your own score on this scale.
| Score range | Classification | Share of people | What it indicates |
|---|---|---|---|
| 85 – 114 | Average | ~68% | The range most people fall into. |
| 115 – 129 | Above average | ~13.6% | Roughly one person in seven. |
| 130 – 144 | Gifted | ~2% | The threshold most high-IQ societies use. |
| Above 144 | Highly gifted | ~0.1% | Figures above this range are extrapolated from the curve rather than measured. |
Percentages are approximate and describe a normal distribution. The same number means different things on tests with different standard deviations.
Thirty questions gives you a measured position on this exact scale — your score, your percentile and the ability breakdown behind it.
Find out in 30 minutes →LeBron James was born in Akron, Ohio in 1984 and was nationally known as a schoolboy player at St Vincent–St Mary High School. He was drafted first overall by the Cleveland Cavaliers in 2003, at eighteen, without attending university.
He has won four NBA championships and four Most Valuable Player awards across spells with Cleveland, Miami and the Los Angeles Lakers. On 7 February 2023 he passed Kareem Abdul-Jabbar to become the league’s all-time leading regular-season scorer.
In 2018 his foundation opened the I PROMISE School in Akron, run in partnership with the city’s public school district rather than as a private academy — an unusual structure that placed the school inside the public system.
The estimate above rests on this record. Every entry here is a matter of public fact, which is more than can be said for the number itself.
Following a claim back to its first appearance is the part almost nobody does — and it is what most people are actually asking.
This page has an unusually good piece of evidence at its centre, and it points somewhere other than where it is usually aimed. After Game 1 of the 2018 Eastern Conference Finals, asked what had gone wrong in the fourth quarter, James reconstructed the sequence possession by possession — who shot, who rebounded, who inbounded, which hand the layup finished with. Reporters checked it against the tape. It was right.
That is precisely the effect Chase and Simon documented in chess players in 1973. Experts reproduce meaningful configurations from their own domain almost perfectly, and random configurations no better than beginners. The advantage is not a bigger memory. It is a library of patterns built over decades, which lets an expert store a whole sequence as a few familiar units instead of forty separate facts.
Which means the recall is strong evidence of twenty years of basketball and weak evidence about anything else — and it is the only evidence any of the circulating figures rests on. Read this page alongside Cristiano Ronaldo, whose profile turns on the same mechanism measured in a laboratory rather than a press room, and alongside Garry Kasparov, where the domain in question happens to be reasoning itself.
One further note on direction. James entered the NBA straight from St Vincent–St Mary High School in 2003, so there is no college transcript, no admission test and no degree to weigh. The absence of an academic record is not evidence of a low score any more than the presence of one would be evidence of a high one. It simply removes the second line of evidence that most profiles here can draw on.
How we read a number →The Game 1 sequence reconstruction and the Game 5 turnover listing. Both were checked against the game tape by reporters present and found accurate. The strongest documented evidence on this page.
Establishes that expert recall advantages are specific to meaningful domain patterns and vanish for random arrangements. The reason the press-conference recall is read here as expertise rather than raw memory capacity.
Searched: interviews, profiles and long-form reporting on his memory. James has never taken a publicly reported IQ test and has never claimed a score.
Checkable league record, used here in place of an academic one.
All reason from the same recall anecdotes. None states a test or a method, and their disagreement spans thirty-seven points.
The figures that circulate for LeBron James, what we were able to confirm, and where the two diverge.
Aggregator pages typically place him between 130 and 150, with 144 the most repeated. Other sites give 113. Most cite his “basketball IQ” as the evidence.
“Basketball IQ” is a term of art in sport, not a psychometric measure. It describes reading a play, anticipating rotations and choosing well under time pressure. James has as strong a claim to it as anyone who has played. It is measured by no instrument, is scored on no scale, and converts to no number — which has not stopped a dozen sites converting it to one.
Thirty-seven points between the published figures, all of them reasoning from the same anecdotes about his memory. When several sites read the same evidence and land that far apart, the evidence is not producing the numbers.
Want a number that does hold up? Every figure on this page is somebody’s claim. Take the 30-question test and get a percentile you can check rather than a figure you have to trust.
There is no test result on record. Figures between 113 and 150 circulate, all inferred from stories about his memory. Our domain-based estimate is 105 to 120.
He has demonstrated verified, near-exact recall of game sequences. Research on expert cognition indicates this is a domain-specific pattern library rather than photographic memory in the general sense.
No. It is a sporting term for reading play and deciding well under pressure. It is measured by no instrument and converts to no number, though many sites convert it anyway.
Reporters present at the 2018 Eastern Conference Finals checked his account against the game tape. The sequence he described, including who shot and who rebounded, matched.
No. He was drafted first overall in 2003 directly from St Vincent–St Mary High School, which is why there is no transcript or admission test to weigh here.
Because chess ratings come from contests of reasoning against rated opponents, which overlaps with what IQ tests sample. Basketball expertise overlaps far less, however elite it is.
You can find out in about fifteen minutes. The IQ Metrics assessment is 30 questions, scored on the same 100-mean scale used throughout this page, so your result and the estimate above are at least expressed in the same units — one measured, one inferred. Once you have a number, the leaderboard shows where it would sit, and how we score and norm it explains the benchmarking.
From the documented record rather than a test — the method is named above and set out in full under how we read a number. Compare it against the other athletes profiles, starting with Magnus Carlsen.
Portrait © Matthew Yohe, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait © Debbie Rowe / The Royal Society, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait by Christopher Smith, U.S. Department of Health and Human Services — a work of the U.S. federal government, public domain. Background removed for the portrait above.
Thirty questions, scored against general-population benchmarks. Your score, your percentile, your ability breakdown and a printable IIF certificate.
Find your IQ score now! →The assessment costs nothing and you always get a real result. Upgrades add precision, analysis and a certificate — never access to the test itself.
Whatever you paid comes off the next tier for 30 days. Start small without losing the money.
Not what you expected? Full refund, no questions, no form to hunt for.
Prices adjust to your country automatically, so the certificate is reachable outside high-income markets.
Coming later: an annual membership (~$89/year) for unlimited retests, practice sets and progress tracking. Monthly billing is deliberately not offered — a once-a-year assessment does not justify a monthly charge, and it would churn.
_(cropped2).jpg){kind=link}
.jpg){kind=link}
