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IQ

What is considered a high IQ?

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2010-11-15 13:02:35

"200,_150,_160,_140,_120,_110,_125" id=

"200,_150,_160,_140,_120,_110,_125">200, 150, 160, 140, 120, 110,

125

"IQ_Scores_&_Ratings" id="IQ_Scores_&_Ratings">IQ Scores

& Ratings

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

Normal Distribution & IQ Scores

The properties of the normal distribution apply to IQ

scores:

50% of IQ scores fall between 90 and 110

70% of IQ scores fall between 85 and 115

95% of IQ scores fall between 70 and 130

99.5% of IQ scores fall between 60 and 140

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 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.


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