Question

What is the name of the group that remains untreated throughout the
duration of an experiment?

Answer 1

Answer: Control Group

This group does not get any treatment, but rather they get a placebo instead. For instance, in a medical experiment testing a new drug, the control group would get a sugar pill (the people in this group think they are getting the actual drug itself, and not a fake pill).

In contrast, the experimental group is the group that receives the actual treatment.

Answer 2

The wait list control group serves two purposes. First, it provides an untreated comparison for the active experimental group to determine if the treatment had an effect.