What would you like to do?

What are standard IQ scale rates?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

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.
12 people found this useful
Thanks for the feedback!

Is IQ scale ordinal or interval?

  Good question.   It is interval. Differences in IQ are meaningful. See:   http://www.math.sfu.ca/~cschwarz/Stat-301/Handouts/node5.html

What is the IQ scale?

100 is average. 70 is dimwit. Anything above 100 is very smart but genius would be reached at 140.   Over 140 - Genius or almost genius 120 - 140 - Very superior intelligen

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

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 scor

Where does the IQ 138 fall on the scale?

superior A score of 138 is more than two standard deviations above the norm (average). This means you scored higher than approximately 98% of people. So, for every hundred p

Does ADHD affect IQ rating scales?

No some may think disabilitys such as ADD ADHD and OCD effect IQ rating, but it dose'nt. I have ADHD and OCD and my iQ is one of the highest in the country it is 243 so if any

What is an IQ of 108 on the scale?

A score of 100 on Wechsler's is a flat average, so 108 is slightly above the flat average, but still within the average range.