A researcher uses a manipulated independent variable in his or her experiment. This means she
A) conducts her research in a laboratory.
B) uses comparison groups.
C) makes her prediction before conducting the study.
D) randomly assigns participants to conditions.

Question

Quizplus · Accepted Answer

Manipulating an independent variable typically involves randomly assigning participants to different conditions to ensure that any observed effects are due to the manipulation rather than pre-existing differences.

A Researcher Uses a Manipulated Independent Variable in His or Her