Margaret took the Wechsler Adult Intelligence Scale and was told that she has an IQ of 90. Margaret is certain this proves that her teachers are grading her unfairly when they give her C's. Margaret's friend Latisha explained that an IQ of 90 is not the same as a grading of 90 percent. Instead, it means that Margaret's
A) score falls at a different percentile, which suggests that she is developmentally disabled.
B) score falls at a different percentile and her IQ is very high.
C) IQ test was invalid, since it is not possible to get a 90.
D) score falls at a different percentile, and her IQ is slightly below average.

Question

Quizplus · Accepted Answer

An IQ score of 90 falls at the 25th percentile, which means that Margaret's score is slightly below average. It does not suggest developmental disability, high IQ, or an invalid IQ test. Therefore, choice D is the best answer.

Margaret Took the Wechsler Adult Intelligence Scale and Was Told