Question

A 9-year-old who responded to the original Stanford-Binet with the proficiency of an average 12-year-old was said to have an IQ of

a. 75.
b. 115.
c. 125.
d. 133.

Answer 1

A 9-year-old who responds to the original Stanford-Binet IQ test with the proficiency of an average 12-year-old would have an IQ of 115.

Step-by-step explanation:

The original Stanford-Binet IQ test is designed to measure a person's intelligence compared to their age group. If a 9-year-old responds to the test with the proficiency of an average 12-year-old, it means that their intellectual abilities are more advanced than their peers. In terms of IQ, this would be considered above average. The correct answer to the question is b. 115.

Answer 2

d. 133.

Step-by-step explanation:

IQ otherwise known as Intelligent Quotient, is a measure of intelligence, which is applied by using ratio of mental age to physical or chronological age, then multiply by 100.

Hence, a child of 9year old had a mental age of 12 year old, (which means, performing on the test meant for an average 12 year old) the child is then assigned IQ of 12/9 * 100 which equals to IQ of 133.

Therefore, a 9-year-old who responded to the original Stanford-Binet with the proficiency of an average 12-year-old was said to have an IQ of 133.