If you wanted to test whether or not a particular pain reliever was effective in the general population, you would need to design an experiment with an experimental group and a control group. What should be the only difference between these two groups?

The explanation of any natural phenomena requires the proper observation, experiment and research methodology. The experimental design should not violate the ethics and do not cause harm to the living organisms.

The testing of any drug requires the involvement of the experimental group and control group. The experimental group must given the tested drug to known its effect and compared with the control group that will get the placebo understand the psychological effect of the drug.

throwdolbeau throwdolbeau · Answer 2 · 2022-01-25T14:01:20+01:00

Difference b/w experimental group and a control group:

The experimental group is given the experimental treatment and the control group is given either a standard treatment or nothing.

Using the same subject as control and experimental group will depend on the study design. If it is a crossover study, then it may be fine as different groups would undergo different interventions or control at various time points.
For example: The testing of any drug requires the involvement of the experimental group and control group.
The experimental group must given the tested drug to known its effect and compared with the control group that will get the placebo understand the psychological effect of the drug.

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