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Intellegence Quotient  Scores & Ratings

Intellegence Quotient Scores & Ratings

Earl Brown · Saturday, May 10th 2014 at 3:26PM · 1092 views
What is a good IQ score? What is a high IQ score? What is a low IQ score? These are common questions, particularly after someone finds out their score from an IQ test.

Lewis Terman (1916) developed the original notion of IQ and proposed this scale for classifying IQ scores:
Over 140 - Genius or near genius
120 - 140 - Very superior intelligence
110 - 119 - Superior intelligence
90 - 109 - Normal or average intelligence
80 - 89 - Dullness
70 - 79 - Borderline deficiency
Under 70 - Definite feeble-mindedness

Low IQ & Mental Retardation
5% of people have an IQ under 70 and this is generally considered as the benchmark for "mental retardation", a condition of limited mental ability in that it produces difficulty in adapting to the demands of life.

Severity of mental retardation can be broken into 4 levels:
50-70 - Mild mental retardation (85%)
35-50 - Moderate mental retardation (10%)
20-35 - Severe mental retardation (4%)
IQ < 20 - Profound mental retardation (1%)

High IQ & Genius IQ
Genius IQ is generally considered to begin around 140 to 145, representing ~.25% of the population (1 in 400). Here's a rough guide:

115-124 - Above average (e.g., university students)
125-134 - Gifted (e.g., post-graduate students)
135-144 - Highly gifted (e.g., intellectuals)
145-154 - Genius (e.g., professors)
155-164 - Genius (e.g., Nobel Prize winners)
165-179 - High genius
180-200 - Highest genius
>200 - "Unmeasurable genius"

More notes on High IQ and Genius IQ:
Einstein was considered to "only" have an IQ of about 160.

Mensa www.mensa.org is a society for people with high IQ, in the top 2% (1 in 50).

In 1926, psychologist Catherine Morris Cox published a study "of the most eminent men and women" who had lived between 1450 and 1850 to estimate what their IQs might have been.

Go to Estimated IQs of the Greatest Geniuses. website address: www.hem.bredband.net/b153434/index.htm

Summary: Understanding IQ
To understand IQ (Intelligence Quotient), you should first have an idea about what intelligence is - read various definitions.
IQ scores reflect general capacity for performing intellectual tasks, such as solving verbal and mathematical problems.

The average IQ score is 100. The standard deviation of IQ scores is 15. So, this means:
50% of people have IQ scores between 90 and 110
2.5% of people are very superior in intelligence (over 130)
2.5% of people are mentally deficient / impaired / retarded (under 70)
0.5% of people are near genius or genius (over 140)

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About the Author

Earl Brown Denver, CO

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Comments (3)

Earl Brown Saturday, May 10th 2014 at 6:09PM

For You Mr. Watley!! Tired of your rudeness and insulting Blogs. 69 IQ, your're not fit to be a Prophet. However Harry, these are only numbers. If you say, you have an IQ of 69, then so be the social model of "self fulling prophecy" or, "As a man thinketh, so shall he be"!

powell robert Sunday, May 11th 2014 at 12:09PM


thank you for these scientific items

harry is as you say a "self fulling prophecy" or, "As a man thinketh, so shall he be"!

as harry examples ---All of the American Past paganChristian examples of 'seers,prophets, prophetesses etc.

robert powell Saturday, January 25th 2020 at 11:46AM


What does this Mean....?

….A 3-year-old Malaysian boy living in the UK has become the youngest member to join the high IQ society

Muhammad Haryz Nadzim was invited to join Mensa after meeting with a psychologist and scoring 142

on the Stanford-Binet IQ test, placing him in the 99.7th percentile,

"Well done to Haryz on his invitation to join Mensa," John Stevenage, the chief executive of British Mensa,

Along with his evaluation by a psychologist, Haryz' score on the Stanford-Binet played a large role in his

acceptance to British Mensa, Mensa spokesperson Charles Brown told CNN.

The test consists of a combination of math, reading, memorization, and logical thinking questions.

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