> See also: > - Reference # Experimental Design The **independent variable** is manipulated by the experimenter (such as time or concentrations). The **dependent variable** is being measured and changes in response to the experimental parameters. The **positive control** should be detected. If it is detected, it demonstrates that the experiment is working properly. The **negative control** should not be detected. If it is detected, it demonstrates that the reagents are contaminated. - [8] Oh woe is me