Ed, age 10, has a raw score of 110.To compute his deviation IQ score, the psychologist will:
A)find the age associated with an average score of 110 and compare that "mental age" to Ed's current age
B)test Ed twice, and compute the difference between the two scores
C)compare this test score with other ratings (from teachers, parents, etc.) of his intelligence
D)compare the location of 110 relative to the average score in the 10-year-olds' distribution

Question

Quizplus · Accepted Answer

To compute Ed's deviation IQ score, the psychologist will need to compare his raw score of 110 with the average score in the distribution for his age group. The deviation IQ score represents how far Ed's score is above or below the average score for his age group, in terms of standard deviations from the mean. Therefore, option D is the correct answer as it involves comparing Ed's score to the average score in his age group distribution. Option A is incorrect as mental age is not used to compute deviation IQ scores. Option B is irrelevant to computing a deviation IQ score. Option C may be useful in other contexts, but it is not relevant to computing a deviation IQ score.

Ed, Age 10, Has a Raw Score of 110