Imagine you have been asked to create an experimental design to test the hypothesis that talking on a cell phone impairs driving skills.

Imagine you have been asked to create an experimental design to test the hypothesis that talking on a cell phone impairs driving skills. Explain why a control condition would be important to include in testing this hypothesis. How should subjects be assigned to conditions? How can the researchers design the experiment so that the only difference between both conditions is the use of a cell phone?