What is a set-up with no variables tested in an experiment known as?

A set-up with no variables tested in an experiment is known as a control set-up. The purpose of this control is to provide a benchmark against which the results of the experimental group can be compared. It ensures that the results observed in the experimental conditions can be attributed to the manipulation of the independent variable, rather than other factors. The control set-up mimics the conditions of the experiment but does not include the variable being tested, allowing researchers to determine the effect of that variable more clearly.

In contrast, the experimental group contains the variable being tested, making it essential for understanding how changes in that variable influence the outcome. Test variables and dependent variables are related to the aspects being measured or manipulated within the experiment. However, the control set-up is specifically defined as the part of the experiment where no experimental variable is introduced, providing a crucial foundation for scientific analysis.