The mechanics of the experiment are as follows:
We will measure your blood pressure and also the amount of saliva in your mouth several times during the session. Blood pressure will be measured a few times and saliva will be measured more or less continuously throughout the session by placing dental cotton rolls in your mouth--you are familiar with them from visits to the dentist. You will place two cotton rolls under your tongue for several 5 minute periods, and after each period, you will remove and replace them with fresh ones.
During the experiment you will watch a video, which is just to occupy your time since you won't be able to talk, and has nothing to do with the experiment. This experiment is essentially risk-free.
Because we are interested in the effects of coffee, if you agree to be in the experiment, we ask that you refrain from eating anything or ingesting coffee or caffeine for two hours prior to the start of the experiment; that is, no coffee, cola, energy drinks, chocolate, drugs that contain caffeine, etc. You may drink water.
Each participant who completes both days will receive a check for $20 in the mail about 2 weeks after the second session. If you can agree to these rules, we would like you to fill out the survey below so we can correctly classify you.