Jane is a ten-year-old girl with a mental age (MA) of twelve. Jane's intelligence quotient (IQ) calculated using Wilhelm Stern's formula is _____.

Question

Quizplus · Accepted Answer

To calculate Jane's IQ using Wilhelm Stern's formula, we need to divide her MA by her chronological age (CA) and multiply by 100. 
IQ = (MA/CA) x 100 
Jane's MA is 12 and her CA is 10. 
IQ = (12/10) x 100 
IQ = 120

Jane Is a Ten-Year-Old Girl with a Mental Age (MA)