Answer :
Final answer:
Using Stern's formula, a mental age of 12 and chronological age of 8 would result in an IQ of 150. Hence, the answer is A. 150.
Explanation:
Using William Stern's formula for calculating intelligence quotient (IQ), which is IQ = (Mental Age/Chronological Age) x 100, Lewis Terman would conclude that an 8-year-old child with a mental age of 12 had an IQ of 150. Here's why: The child's mental age is 12, and their chronological age is 8. Therefore, the calculation would be (12/8) x 100, which equals 150. So, the answer is A. 150.
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