On modern tests of intelligence, IQ scores are determined
A) by comparing a child's score with the average score of same-age children.
B) by using the same IQ calculation as on the original Stanford-Binet exam.
C) based on a child's gender and race.
D) by subtracting a child's chronological age from their mental age.

Question

On modern tests of intelligence, IQ scores are determined
A) ​by comparing a child's score with the average score of same-age children.
B) ​by using the same IQ calculation as on the original Stanford-Binet exam.
C) ​based on a child's gender and race.
D) ​by subtracting a child's chronological age from their mental age.

Quizplus · Accepted Answer

Modern IQ tests use a standardized scoring system in which an individual's performance is compared to the performance of others in their age group. This is known as the "deviation IQ" system. An average score in this system is 100, and scores are distributed according to a normal curve. Therefore, A is the correct answer.

B is incorrect because different IQ tests use different calculations and scales, and the Stanford-Binet test is just one of many tests.

C is incorrect because basing IQ scores on race and gender would be discriminatory and is not a valid way to measure intelligence.

D is incorrect because mental age is not used in modern IQ testing.

On Modern Tests of Intelligence, IQ Scores Are Determined