A researcher wants to know whether a new drug reduces anxiety. Forty participants who suffer from anxiety disorder are assigned randomly to one of two groups. One group gets the new drug and the other group gets a placebo. Neither group knows which they receive. After 30 days on the drug, their anxiety levels are measured. In this experiment, is the independent variable and is the dependent variable.
A) anxiety, the new drug
B) the new drug, the placebo
C) anxiety, the placebo
D) the new drug, anxiety

Question

Quizplus · Accepted Answer

The independent variable is the one that is manipulated by the researcher, which in this case is "the new drug" (participants are either given the new drug or a placebo). The dependent variable is the outcome that is measured, which is "anxiety" levels after the treatment.

A Researcher Wants to Know Whether a New Drug Reduces