Which of the following is the best description of a control for an experiment?
A) The control group is kept in an unchanging environment.
B) The control is left alone by the experimenters.
C) The control group is matched with the experimental group except for the one experimental variable.
D) The control group is exposed to only one variable rather than several.
E) Only the experimental group is tested or measured.

Question

Quizplus · Accepted Answer

A control group should be matched with the experimental group in every way except for the experimental variable being tested. This ensures that any observed effects can be attributed to the variable being tested rather than other factors. Options A, B, D, and E do not fully encompass the purpose of a control group in an experiment.

Which of the Following Is the Best Description of a Control