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Question
Find out the IQ of a 14-year-old child with a mental age of 16.
Numerical
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Solution
Mental Age (MA) = 16
Chronological Age (CA) = 14
Use the formula developed by William Stern:
IQ = `"MA (Mental Age)"/"CA (Chronological Age)" xx 100`
= `16/14 xx 100`
= 1.1428 × 100
= 114.28
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