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1.Lab experimentation:
This is carried out within the confines of a room designed as a laboratory where there is precise control of variables (i.e.) independent variable is manipulated to control dependent variable.
2.Field experimentation:
This is carried out in more natural setting for example in the field where plants species are used as variables. Just like in the lab experiment, the independent variable is deliberately manipulated by the person doing the experiment though there is no tight control over the variables e.g. when a trial is being done on people with HIV/AIDS by giving them a new drug and observing them for a given time to see their response to the drug.
3.Natural Experiment:
An example is if a decision is made for experimental purpose in a particular hospital to have mixed patient wards rather than the usual separate wards for men and women. The effects on patients in these wards could be compared with those in single wards.
However this may not reflect real experimental case because one is not able to manipulate variables but might fulfill the objective set.
Titany answered the question on September 15, 2021 at 13:01
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