IQ 156

In a town of 100,000 people, the bell curve expects only about 9 at 156 or higher. That rarity, about 1 in 10,600, is what puts 156 in the highly gifted range.

People this rare can find it takes effort to meet intellectual peers. University departments, clubs and communities built around hard problems help.

A very high score is not a forecast. Eminence depends on years of work, opportunity, collaborators and luck as much as on ability.

People who score around 156, and the teachers who work with them, often describe some of the following. Treat it as a set of possibilities, not a profile:

• Complex ideas can click after one explanation, which makes slow-paced teaching feel frustrating.
• It can be hard to judge what is obvious to other people, so explaining clearly takes practice.
• Perfectionism and overthinking come up often in first-hand accounts.

Measurement gets harder the rarer a score is. A 156 is rare enough that a standard norm sample of about 2,200 people holds probably nobody at that level or above.

Ceiling effects set in when a test runs out of hard questions. Strong test-takers then bunch at the top and the score stops separating them.

Short online tests, including ours, are best at telling you roughly where you are. Treat a 156 from one as "well above 140" rather than an exact figure.

If IQ follows the standard bell curve, 0.0095% of people score 156 or higher. Here is what that share means across whole populations:

Compare the neighbours: 151 or higher is about 1 in 2,968, 156 or higher is 1 in 10,600, and 161 or higher is 1 in 41,900. Each point up here adds roughly 31% to the rarity.

What your 156 could really be. Even a good supervised test has a margin of error of roughly 5 points either side. A true score anywhere from 151 to 161 would be consistent with a 156, which spans the 99.97th to the 99.998th percentile. Short online tests have wider margins.

Which scale was it on? Score reports do not always say. On the common SD 15 scale your 156 stands as it is. If the report used SD 16 it equals about 153, and if it used SD 24 about 135. The percentile follows the converted number.

Scientists, composers and philosophers often receive estimates in this range. These sit near 156. None of these are test scores. They are estimates from biographical evidence, and each profile explains its basis.

Nearby scores and the round-number landmarks, so you can see how quickly the percentile changes around 156. Every row links to that score's page.

People with an IQ of 156 typically score about 1600 on the SAT and about 36 on the ACT composite. Scores vary a lot from person to person, so the range shows where about four in five land.