1,000+Fictional genius levelFictional IQ
400De Mello IQ (parent ratio fake)Feigned IQ
325Kearney IQ (parent ratio fake)Feigned IQ
250-300Sidis IQ (legend over-estimate)
226+Superlative; artificial; fools gold
225Goethe level
1 geniuses
205-220Clausius to Newton level5 geniuses
200Da Vinci level2 geniuses
195Last universal genius range
(e.g. Helmholtz, Leibniz)
12 geniuses
190Pascal to Pareto level29 geniuses
185Grotius to F. Bacon level38 geniuses
180Tinsley to Spinoza level96 geniuses
175Universal genius range
(e.g. Homer)
60 geniuses
170Vergniaud to Linnaeus level63 geniuses
165Pearson to Berzelius level54 geniuses
160Clarendon to Jacquard level43 geniuses
155Blake to Friedman level40 geniuses
150Capote to Rembrandt level18 geniuses
145Sherman to Galton level18 geniuses
144-158+Mean Nobel Laureate IQ(Ѻ)(Ѻ)
140Genius (or near genius)
(e.g. Disney)
11 geniuses
120-139Very superior intelligence
118-120College graduate[3](Ѻ)
111-119Superior intelligence
90-110Average intelligence (normal)
75Forest Gump (as child)
71-79Borderline feeble-minded
51-70Mind like child aged 8 to 12Moron
50Homo erectus (mind)
26-50Mind like child aged 3 to 7 Imbecile
0-25Mind like child aged 1 to 2Idiot

The general IQ scale (2017), a 0 to 225 point scale, where an IQ of 100 is average, 140 or above is genius (see: top 500 geniuses), 200 or above is either considered impossible (see: IQ 200 or above impossible) or super genius level, and 89 or below, for someone aged 16 or above, is considered learning disabled.
In education, IQ scale is a numbered ordering of intellects, from 0 to 139 for the general population, 100 being the mean or average IQ, and 140 or above for genius level intellects, 180 and above for big geniuses, 195 and above for epicenter geniuses and or iconic geniuses, 200 to 225 being allotted to the top handful or so of top geniuses, and numbers 226 or above being, fictional, artificial, and or feigned IQ estimates.

In 1905, Alfred Binet published the Binet-Simon intelligence scale, designed to test for “inferior states of intelligence”, so to diagnose and thus better facilitate the education of so-called “feeble minded” individuals, below age 16.

In 1910, Henry Goddard, who had begun to translate Binet’s intelligence scale ideas into English, at the May 18 meeting of the American Association for the Study of Feeble-Minded, proposed that the term “feeble minded” be subdivided into three categories; something to the effect of the following:

Idiots: mental age of 1 to 2
Imbeciles: mental age of 3 to 7
Morons: mental age 8 to 12

Of note, it is sometimes stated in poorly-written books, e.g. Discrimination or Diversity (Ruiz, 2009), based on faulty Wikipedia pages, e.g. Henry Goddard (2008) (Ѻ), that Goddard, in 1910, was using the terms “moron for those with an IQ of 51-70, imbecile for those with an IQ of 26-50, and idiot for those with an IQ of 0-25 for categories of increasing impairment”. [1] This, however, is incorrect, being that the concept of IQ was not invented until 1916 by Terman. Correctly, Goddard, in the years 1910 to 1912, was simply coining new words, e.g. imbecile “one who has a mental state like that of a small child aged three to seven”. (Ѻ)

In 1912, William Stern added to Binet's work by inventing the concept of "mental quotient", defined as the ratio of the age the test was designed for divided by the age of the person who takes the test. Thus, for instance, if an eight-year-old took a test designed for a ten-year-old, and passed, the child's MQ would be 1.25 or ten divided by eight.

In 1916, Lewis Terman, in his “The Measurement of Intelligence”, added Binet’s ideas with Goddard’s ideas, and therein conceived the idea of multiplying Stern’s “Mental Quotient” (MQ) by 100 to thus obtain a 1 to 100 range scale of so-called “Intelligent Quotients” (IQ), the scale markers as follows: [2]

IQ scale (170-140) (Terman, 1916)

In 1919, the Encyclopedia American, citing Terman (1916), summarized things as follows: (Ѻ)

“The feeble-minded are classified according to mental age, that is, the age of a normal child of the same mentality. For example, a feeble-minded person of mental age 6 has a mind approximately like that of a normal child of 6. The feeble-minded are also divided into three groups, idiots, imbeciles and morons. Idiots are those of mental age 1 and 2. Imbeciles comprise those of mental age 3 to 7 inclusive. Morons include those of mental age 8 to, perhaps, 12 — the upper limit is somewhat uncertain. It is also customary to speak of the I.Q. (Intelligence Quotient) of a feeble-minded person. This is found by dividing his mental age by his actual age, e.g., a child who is 12 years old and of mentality 9 would have an I.Q. of 9/12 or 75. In using the I.Q. no higher actual age than 16 is used because it is supposed that the mental age of the average man does not go beyond 16. So that if a feeble-minded person is, say, 30 years old, we divide by 16 and not by 30.”

In Jan 2008, Libb Thims began collecting citations of geniuses (e.g. Goethe) and presumed-to-be geniuses (e.g. Savant) with IQs cited in the 200 or above range; the then-ranked, by purely numerical score, listing is as follows:

IQ 200+ listing (circa 2008)

In 2010, Libb Thims began calculating the mean IQs of the 23 geniuses common to both the three-hundred geniuses of Cox IQs (1926) and the 100 geniuses of the Buzan IQs (1994), so to get a more-cogent neutral IQ value for established historical so-called "anchor point" geniuses; a graph of which is shown below:

IQ scale (ceiling fitted)

In Jun 2017, Libb Thims had 502 non-existive top 500 geniuses ranked cogently, to a first approximation, each with real IQs (true IQs), based on all known historical approximations, from 140 to 225.

1. Ruiz, Enrique. (2009). Discrimination or Diversity (pg. 43). Positive Psyche Biz Corp.
2. Terman, Lewis. (1916). The Measurement of Intelligence: an Explanation of and a Complete Guide for he Use of the Stanford Guide for the Use of the Stanford Revision and Extension of the Binet-Simon Intelligence Scale (classification of intelligence, pg. 79; I.Q., pg. 53, etc.). Houghton Mifflin Co.
3. Simonton, Dean K. (2006). “Presidential IQ, Openness, Intellectual Brilliance, and Leadership: Estimates and Correlations for 42 U.S. Chief Executives” (pdf), Political Psychology, 27(4):511-26.

External links
IQ classification – Wikipedia.

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