Many feel that the difference between an IQ of 100 and 105 is not the same as the difference between an IQ 70 and 75.These people feel that IQ tests lack ____.
A) absolute zeroes
B) magnitudes
C) ratios
D) equal intervals

Question

Quizplus · Accepted Answer

IQ tests lack equal intervals, meaning that the difference between scores is not consistent across the entire range of scores. This is a characteristic of an interval scale. However, IQ tests do have an absolute zero (for example, someone with an IQ of 0 would be non-existent), so A is not the correct answer. While IQ tests may have magnitudes (a score of 105 is larger than a score of 100), this does not accurately address the issue with the consistency of the differences between the scores, so B is not the correct answer. Lastly, ratios are not relevant to IQ scores, so C is not the correct answer.

Many Feel That the Difference Between an IQ of 100