IQ : Intelligence Quotient
It is a number used to express how intelligent a person is.
In 1905, psychologists Alfred Binet and Theodore Simon designed a test for children who were struggling in school in France.
Designed to determine which children required individualized attention, their method formed the basis of the IQ test.
The intelligence quotient is one of the many tests of intelligence to calculate the relative intelligence of a person.
The relative intelligence of a person can be calculated from two data:
- Mental Age
- Chronological Age
Now, if Mental Age and Chronological Age are given to us, there is a theoretical formula to calculate a person's IQ.
Intelligence Quotient Formula:
Also, from the formula of IQ, it follows that
And
Where MA = Mental Age
CA = Chronological Age
Psychologists make classifications according to IQ range.
According to the Sandford-Binet Fifth Edition classification, the IQ level chart is below.
IQ Level Chart:
| IQ Range | IQ Classification |
|---|---|
| 144 and above | Very gifted or highly advanced |
| 130-144 | Gifted or very advanced |
| 120-129 | Superior |
| 110-119 | High average |
| 90-109 | Average |
| 80-89 | Low Average |
| 70-79 | Borderline impaired or delayed |
| 55-69 | Mildly impaired or delayed |
| 40-54 | Moderately impaired or delayed |