A boy who is 6 years old has just tested at a mental age of 5. What would his IQ be, using Terman's formula for deriving this number?

Name: A boy who is 6 years old has just tested at a mental age of 5. What would his IQ be, using Terman's formula for deriving this number?
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Question

Quizplus · Accepted Answer

Terman's formula for IQ is (Mental Age / Chronological Age) * 100. For the boy, this would be (5 / 6) * 100 = 83.33, which rounds to 83.  Mental age (5) divided by chronological age (6) x 100 = IQ.

A Boy Who Is 6 Years Old Has Just Tested