The Group's Methodology, we used Focus group method using the PSU student 10 people with a healthy body healthy by the body mass index measurement, and medical certificate, and to assess the risks that may occur. Before the experiment, we tried to create a good night's sleep for 8 hours. At the same time. We take place in front of the mirror test is divided into two groups, each group of 5 people take to drink that contains caffeine. The other way, do not drink caffeine. Drinks that contain caffeine, there are 2 events used in the experiment is a caffeine Cappuccino and Espresso with a quantity of caffeine mg 142.5 280mg. we do experiments twice the first time trial in the second trial Cappuccino Espresso, we watched the trial, as well as the person's behaviour than to feel drowsy.
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