In an experimental situation, the independent variable:
A) is a placebo.
B) is measured.
C) is held constant.
D) is manipulated.

Question

Quizplus · Accepted Answer

The independent variable is the variable that the researcher manipulates or changes in the experiment to observe its effect on the dependent variable. This means that the correct choice is D, as it states that the independent variable is manipulated. The other answer choices are not correct, as a placebo (A) is not an independent variable, but rather a control or comparison group, and measuring (B) or holding constant (C) a variable are not manipulation techniques that change the variable being studied.

In an Experimental Situation, the Independent Variable