Describe the confounding variable they are trying to eliminate by completing this new study.

The researchers acknowledged the fact that there were confounding variables involved in this study. They tried to minimize these by doing other studies to try to answer the same research question. In another study, they again interviewed subjects on the suspension bridge just as before. As a control, they interviewed subjects that had already crossed the suspension bridge at least 10 minutes earlier and were sitting or walking in the nearby park.