It is hard to measure "intelligence." To do it the easy way, one can measure the circumference of the head, just above the ears, in inches, and call the result "intelligence." Not only is this method easy; it gives nearly the same number every time one repeats the measurement on the same person. Measuring intelligence this way is:
A) not reliable and not valid.
B) highly reliable but not valid.
C) valid but not reliable.
D) both valid and highly reliable.

Question

Quizplus · Accepted Answer

This method is highly reliable because it produces consistent results upon repeated measurements on the same person. However, it is not valid because the circumference of the head is not a relevant or accurate measure of intelligence.

It Is Hard to Measure "Intelligence