Question

Kendra is researching the effects of vitamin C on test-taking ability. Before the exam, Kendra gives group A orange juice, and group B water. Vitamin C is the ______.
A. Experimental group.B. Dependent variable.C. Control group.D. Independent variable.

Answer 1

Answer:

D. Independent variable.

Explanation:

In research, we have two different types of variables:

• The independent variable is the one that the researchers can control and that will have an effect on another variable.

• The dependent variable is the one that cannot be control and that is affected by the independent variable. Researchers observe this variable to see how it changes. This is the variable that will be tested or measured.

In this example, Kendra will research the effects of vitamin C on test-taking ability. We can see that vitamin C will have an effect on the ability of taking tests and Kendra can control this variable by giving orange juice (or not) to the different groups. Therefore, vitamin C is the d. independent variable