An experiment where neither the subjects nor the experimenter know which is the control group or which is the experimental group is called a:

A) Natural Experiment

B) Randomized Experiment

C) Double Blind Experiment

D) Control Experiment




A) Wrong Answer: A natural experiment can occur in the course of natarul events (like a hurricane) it contains neither a predertemined control or experimental group.

B) Wrong Answer: I made up Randomized Experiment.

C) Correct!! A Double blind experiment is designed to avoid experimenter bias. To ensure that both the experimental and the control group are observed and measured as identically as possible, neither the experimenter nor the subjects know which is the control group or the experimental group.

D) Wrong Answer. I made up up the term: Control Experiment.