Critics point out that studies on the effectiveness of antioxidants in slowing the aging process thus far have been so-called population studies that are ________ in nature.
A) hypothetical
B) longitudinal
C) experimental
D) correlational

Question

Quizplus · Accepted Answer

Population studies are generally correlational in nature, meaning they examine the relationship between variables without manipulating them. Therefore, option D, correlational, is the best choice. Option A, hypothetical, is not a valid descriptor of the nature of the studies. Option B, longitudinal, may apply to some of these studies, but it is not a defining feature of them. Option C, experimental, is not accurate as population studies are not experimental in nature.

Critics Point Out That Studies on the Effectiveness of Antioxidants