Five-year-old Benjy has an IQ of 120 on the original version of the Stanford-Binet. His mental age is

A) 4.
B) 6.
C) 8.
D) 9.

Mental Age

A measure of an individual's cognitive ability compared to the average cognitive ability of an age group, often used in IQ tests.

Stanford-Binet

A method of measuring intelligence through a standardized IQ test, originally developed by Alfred Binet and later revised at Stanford University.

IQ

A measure of a person's intelligence as indicated by an intelligence test, expressed as a score relative to a statistically normal curve.