Thank you for your interest in participating in our study. Data on your heart rate will be collected during the study. Because we do not want these results to be affected by the use of medications, please do not sign up if you are currently taking any medications for high blood pressure, heart rhythm problems, asthma, ADHD, thyroid problems, or nasal congestion. Please be aware that some of you (randomly chosen) will be asked as part of the experiment to perform tasks that you may find somewhat stressful. If you still wish to sign up, click on the button below.