Find out the IQ of a 10 year old child with a mental age of 14:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 140
Intelligence Quotient (IQ) is mental age divided by chronological age, multiplied by 100.
Given: mental age (MA) = 14 years, chronological age (CA) = 10 years
IQ = (MA ÷ CA) × 100
IQ = (14 ÷ 10) × 100 = 1.4 × 100 = 140
When the mental age is more than the chronological age, the IQ is more than 100, so a child whose MA is four years ahead of the CA must score well above 100.
NCERT (2025-26): “Assessment of Intelligence … In 1908, when the scale was revised, they gave the concept of Mental Age (MA), which is a measure of a person’s intellectual development relative to people of her/his age group. A mental age of 5 means that a child’s performance on an intelligence test equals the average performance level of a group of 5-year olds. Chronological Age (CA) is the biological age from birth. A bright child’s MA is more than her/his CA; for a dull child, MA is below the CA.…” “…In 1912, William Stern, a Ger man psychologist, devised the concept of Intelligence Quotient (IQ). IQ refers to mental age divided by chronological age, and multiplied by 100.…” “…When the MA equals the CA, the IQ equals 100. If MA is more than the CA, IQ is more than 100. IQ becomes less than 100 when the MA is less than the CA.…” |