# AP PSYCHOLOGY

## COGNITION

### THINKING AND LANGUAGE

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A 6-year old (chronological age) has a mental age of 9. The child’s IQ is ____
 A 90 B 100 C 115 D 150
Explanation:

Detailed explanation-1: -The Intelligent Quotient is obtained by dividing the mental age (MA) by the chronological age (CA) so that children of different chronological age can be compared. To remove the decimal point, the result is multiplied by 100. Therefore, IQ = MA/CA X 100.

Detailed explanation-2: -IQ was originally computed by taking the ratio of mental age to chronological (physical) age and multiplying by 100. Thus, if a 10-year-old child had a mental age of 12 (that is, performed on the test at the level of an average 12-year-old), the child was assigned an IQ of 12/10 × 100, or 120.

Detailed explanation-3: -Let’s say the individual being tested is 23 years old. The psychologist would first take the individual’s IQ score and divide it by the standard of 100 for a result of 1.2. Then the psychologist would multiply the answer by the person’s chronological age of 20 to get a mental age of 24.

There is 1 question to complete.