When conducting an experiment, the control group does not receive the treatment, while the experimental group is exposed to it. Individuals from both groups come from the same population.
<h3>What are the control group and the experimental group?</h3>
During an experiment the researcher compares at least two groups: a control group and an experimental group.
Both of them are composed of individuals coming from the same population, so they are identical in all aspects except for the independent variables.
Both groups must be similar in every variable that might influence the results, except for the study treatment.
- The control group is the one used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
It is useful to have a control group to observe how it responds when no treatment is applied.
The independent variable always keeps constant in the control group.
- The experimental group is subjected to the effects of the treatment.
The researcher applies different treatments to the experimental groups to analyze their response.
The researcher voluntarily changes the values of the independent variable to observe how it affects the individuals subjected.
There can be several experimental groups.
In conclusion, the control group does not receive the treatment, while the experimental group does.
You can learn more about the control and experimental groups at
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