Intelligence Quotientcommonly known as IQ refers to the score of a standardized test thatassesses and measures human intelligence.
- The concept and formula of Intelligence Quotient were developed in 1912 by a German psychologist,WilliamStern.
- An individual’s Intelligence Quotient (IQ) is determined by the formula given below,
\({\bf{Intelligence}}\;{\bf{Quotient}}\;\left( {{\bf{IQ}}} \right) = \frac{{{\bf{Mental}}\;{\bf{Age}}\;\left( {{\bf{MA}}} \right)\;}}{{{\bf{Chronological}}\;{\bf{Age}}\;\left( {{\bf{CA}}} \right)}} \times 100\)
- Where,
- Mental Ageis based onintellectual development.
- Chronological Ageis thenumber of years a person has lived.
Given:CA = 4years
MA = 5years
\(\therefore IQ = \frac{{{\bf{5}}}}{{4}} \times 100\)
IQ = 125
![[Solved] If a child has the mental age of 5 years and chronological a (1)](https://i0.wp.com/cdn.testbook.com/resources/lms_creative_elements/additional-information-image.png "[Solved] If a child has the mental age of 5 years and chronological a (1)")
Additional Information
IQ table:
IQ Classification | IQ Range |
Genius | 145and above |
Very superior | 135-145 |
Superior | 125-135 |
Above-average | 115-125 |
Average | 90-115 |
Below average | 80-90 |
Dull or borderline | 70-80 |
Feebleminded, Moron | 50-70 |
Imbecile | 25-50 |
Idiot | 0-25 |
Hence, we conclude that if astudent's chronological age is 4years and the mental age is 5years,hisI.Q. will be 125.
![[Solved] If a child has the mental age of 5 years and chronological a (2024)](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/h8AAvMB+NzmkbcAAAAASUVORK5CYII=)