What experiment that tests only one factor at a time by using a comparison of a control group and an experimental group is and?

An experiment that tests only one factor at a time using a comparison of a control group and an experimental group is known as a controlled experiment. In this type of experiment, the control group remains unchanged and is used as a baseline for comparison, while the experimental group is subjected to the specific factor being tested. This design allows researchers to isolate the effects of the variable, ensuring that any observed changes in the experimental group can be attributed to that factor alone. This method enhances the validity and reliability of the experimental results.