What is control group in an experiment?
What is control group in an experiment?
user
When researchers test a hypothesis, they’ll often try to study two groups of people in two different settings.  In one group, the researchers will give the people the treatment or experience they’re interested in.  In the other group, the researchers will only observe the people in the control group, without giving them any treatment.  So the control group is basically a group of people who are kind of like the experimental group, but who don’t get treated.
assistant
So they are not tested then?
user
No, the control group is used to learn about the characteristics of people who are “normal” in a certain situation.  For example, if the experimental group gets really sick after taking a drug, the control group will show us what it’s like to not take the drug.
assistant
So they really do have meaning.
user