The first intelligence quotients were produced by comparing children's mental ages with the mental ages of their same-age peers.This means that if a seven-year-old child was performing as if she were a six-year-old,her IQ would be
A) about 86,below average.
B) about 100,average.
C) about 115,above average.
D) We can't determine based on this information.

Question

Quizplus · Accepted Answer

If a seven-year-old child performed as if she were a six-year-old, her mental age would be 6/7 of her chronological age, which is about 0.86. Multiplying this by 100 gives an IQ score of about 86, which is below average.

The First Intelligence Quotients Were Produced by Comparing Children's Mental