Imagine that the average 6-year-old can complete a particular block design puzzle in 5 minutes. It takes Bailey, who is 6 years old, 8 minutes to complete the task. In Binet's terms, Bailey's ________ age is ________ than 6; his IQ is thus ________ than 100.
A)chronological; higher; greater
B)chronological; lower; less
C)mental; higher; greater
D)mental; lower; less

Question

Quizplus · Accepted Answer

Bailey's mental age is considered lower than 6 because it takes him longer than the average 6-year-old to complete the puzzle. Since IQ is calculated based on the ratio of mental age to chronological age, his IQ would be less than 100.

Imagine That the Average 6-Year-Old Can Complete a Particular Block