If Tilberg has a mental age of 9 and a chronological age of 10, Terman would state that his IQ was which of the following?

A) 111
B) 9
C) 90
D) 111.
E) None of these

Mental Age

Mental age is a concept used to describe the level of intellectual development as compared to the average intellectual capacity of individuals at a particular age, often used in IQ testing.

Chronological Age

The exact age of a person or thing, measured in years from the date of birth or inception to the current date.

IQ

A measure of a person's intellectual abilities as compared to the average population, typically assessed through standardized tests.