A five-year-old child taking the Stanford-Binet test and scoring at a mental age of four would have an IQ of ____.
A) 50
B) 80
C) 110
D) 130

Question

Quizplus · Accepted Answer

The Stanford-Binet test calculates intelligence quotient (IQ) by dividing the mental age (MA) by the chronological age (CA) and multiplying by 100. The 5-year-old child's mental age of 4 gives an IQ of (4/5) x 100 = 80. Therefore, the best choice is B.

A Five-Year-Old Child Taking the Stanford-Binet Test and Scoring at a Mental