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First of all, the concept of IQ was developed by either the German psychologist and philosopher Wilhelm Stern in 1912, or by Lewis Terman in 1916, depending on which sources you consult. Intelligence testing was first done on a large scale before either of these dates. In 1904 psychologist Alfred Binet was commissioned by the French government to create a testing system to differentiate intellectually normal children from those who were inferior.

Thus the IQ scale called the "Binet Scale," (and later the "Simon-Binet Scale") was developed. Sometime later, "intelligence quotient," or "IQ," entered our vocabulary. Lewis M. Terman revised the Simon-Binet IQ Scale, and in 1916 published the Stanford Revision of the Binet-Simon Scale of Intelligence (also known as the Stanford-Binet). The following scale resulted for classifying IQ scores:

IQ Scale

Over 140 - Genius or almost genius

120 - 140 - Very superior intelligence

110 - 119 - Superior intelligence

90 - 109 - Average or normal intelligence

80 - 89 - Dullness

70 - 79 - Borderline deficiency in intelligence

Under 70 - Feeble-mindedness

Normal Distribution of 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

An IQ under 70 is considered as "mental retardation" or limited mental ability. 5% of the population falls below 70 on IQ tests. The severity of the mental retardation is commonly 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 or near-genius IQ is considered to start around 140 to 145. Less than 1/4 of 1 percent fall into this category. Here are some common designations on the IQ scale:115-124 - Above average

125-134 - Gifted

135-144 - Very gifted

145-164 - Genius

165-179 - High genius

180-200 - Highest genius

The Average On An IQ Scale

The scoring of an IQ test is not the same for everyone, because age is used in determining a score. Intelligence quotient is determined by the "intelligence age" (I A) in relation to the chronological age of the person being tested. IQ scales can differ from each other (Americans use scales with IQ values above 200), but the mean value of most scales is an IQ of 100. This represents normal intelligence.

Think you are smart? Well, if your IQ is 130, that puts you ahead of 98% of people, but recent research shows that a person's level of self-discipline has nearly as much to do with success as their IQ level. In other words, your IQ score is not the only requirement for success.

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Q: What are standard IQ scale rates?
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What is the general scale for IQ?

Generally IQ measures are standardized so that an IQ of 100 is the average score for the norming population, and standard deviations can vary from 10 to 15, depending on the measure used.


What is the wechsler full scale IQ?

The Wechsler Full Scale IQ is a measure of general intelligence that is derived from several subtests of the Wechsler Adult Intelligence Scale (WAIS) or Wechsler Intelligence Scale for Children (WISC). It provides an overall assessment of an individual's cognitive abilities, including verbal comprehension, perceptual reasoning, working memory, and processing speed. The Full Scale IQ score is a standardized score with a mean of 100 and a standard deviation of 15.


US IQ Standard deviation?

US IQ standard Deviation is 16.


What is the analysis or interpretation on this weschsler adult intelligence scale Verbal IQ 82 Performance IQ 70 Full Scale 76?

This is almost 2 standard deviations below average so these numbers indicate a person who will be challenged when it comes to learning academic material.


How does an IQ of 171 rate on an IQ scale?

A score of 171 is genius.


What is 106 rated on an IQ scale?

(I am answering the question assuming it can fairly be rephrased "How does an IQ of 106 rate/rank on an IQ scale") By definition, an IQ of 100 is "average". Therefore a score of 106 is slightly above average. More specifically, using the WAIS/Stanford Binet definition wherein a standard deviation of 0.25 corresponds to 4 IQ points, an IQ of 106 roughly corresponds to a standard deviation of 0.38/0.39. What all that means is that an IQ of 106 roughly corresponds to a percentile rank within the population of about 65%, or, in other words, a person with an IQ of 106 is "smarter" than 65% of the population. By one accounting, the average college graduate has an IQ of 116 (and a percentile rank of 84%).


If my full scale iq is 77, my memory IQ is 83, my verbal IQ is 9, And myspatial IQ is 102 What is my IQ?

Sorry verbal iQ is 96. not 9


What are the levels on the IQ scale?

tyw


What is the IQ number scale?

124


Difference between Wechsler Scales and the SBIS?

A great difference is that Wechsler scale doens't calculate your IQ the same way as STanford-binet intelligence scale. 132 iQ (wechsler) => something like 140...in the SBIS scale. You will find a really complete answer by going on best-iq-test (dot) on the title: IQ: IQ Test scales - The Stanford-Binet scale.


How does an IQ of 143 rate on an IQ scale?

A score of 143 is very, very high.


What is Hillary Clinton IQ?

Hillary Clinton's IQ score is 140. On the IQ scale, this puts her in the high range of "Exceptional."