Correct Answer - Option 4 : 12
Intelligence is known as the ability to learn, the ability to deal with abstractions and to make adjustments to new situations. Several experiments have concluded that intelligence is the product of heredity and the environment.
- The measurement of intelligence involves the comparison and establishment of a relationship between CA (chronological age) and MA (mental age). This relationship is expressed by the term I.Q. (intelligence quotient).
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I.Q. was introduced by the German psychologist William Stern which was widely spread by Terman.
- It can be calculated with the formula - \({\bf{Intelligence}}\;{\bf{Quotient}}\;\left( {{\bf{IQ}}} \right) = \frac{{{\bf{Mental}}\;{\bf{Age}}\;\left( {{\bf{MA}}} \right)\;}}{{{\bf{Chronological}}\;{\bf{Age}}\;\left( {{\bf{CA}}} \right)}} \times 100\)
- The concept of I.Q. and scores on intelligence tests have been found useful in labeling the individual as gifted, average (normal), or subnormal (retarded).
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Chronological Age is the number of years a person has been alive.
- In the above question, IQ =75, CA=16, MA= Let assume this as "X".
\({\bf{75}}\;{\bf{}}\;\left( {{\bf{IQ}}} \right) = \frac{{{\bf{X}}\;{\bf{}}\;\left( {{\bf{MA}}} \right)\;}}{{{\bf{16}}\;{\bf{}}\;\left( {{\bf{CA}}} \right)}} \times 100\)
= MA = (75 * 16 )/100
= 1200/100
= 12 Years.
Hence, it is clear that if a child of 16 years scores 75 on an IQ test then his mental age will be 12 years.
|
IQ RANGE
|
IQ CLASSIFICATION |
| 130 and above |
Very Superior |
| 120-129 |
Superior |
| 110-119 |
High Average |
| 90-109 |
Average |
| 80-89 |
Low Average |
| 70-79 |
Border Line |
| 69 and below |
Extremely Low |
