It has been discovered that researchers will often unknowingly treat the experimental group differently than the control group. To minimize this threat to internal validity, research will often direct research assistants who don't know who is in the experimental and control groups) to administer the experimental treatment. This is often called a
A) double-barreled experiment.
B) triple-shop post-test only experiment.
C) classical experimental design.
D) double-blind experiment.

Question

Quizplus · Accepted Answer

This is known as a double-blind experiment, where neither the participants nor the researchers know who belongs to the control group and who belongs to the experimental group, thus minimizing bias.

It Has Been Discovered That Researchers Will Often Unknowingly Treat