A process that is adjusted in order to evaluate the influence of a variable by comparing it to a control condition.

This is known as a controlled experiment. Here are the steps to conduct a controlled experiment:

1. Identify the Variable: The first step is to identify the variable that you want to test. This could be anything from a new drug to a new teaching method.

2. Establish a Control Group: The control group is the group that does not receive the variable being tested. This group is used as a baseline to compare the results of the experiment.

3. Establish an Experimental Group: The experimental group is the group that receives the variable being tested.

4. Conduct the Experiment: The experiment is then conducted. Both the control group and the experimental group are observed and data is collected.

5. Analyze the Data: After the experiment is conducted, the data is analyzed. The results of the control group and the experimental group are compared to see if the variable had any effect.

6. Draw Conclusions: Based on the data analysis, conclusions are drawn about the effect of the variable. If the experimental group showed a significant difference compared to the control group, it can be concluded that the variable had an effect.