When four age groups are tested for reaction time, numerical memory, verbal memory, and visual memory with different amounts of caffeine the youngest age group has the most evident improvement in performance. My hypothesis was incorrect, in fact the older age groups showed less change in score rather than the younger. Based on the data (we’ll use reaction time) ages 12-14s reaction time decreased by 0.05 seconds with caffeine, while the 24 and over age group had an average decrease of only 0.03. This data concludes that younger brains are the most affected by caffeine. This may be due to the minimal caffeine exposure they have at this age. Most adults drink more than two cups of coffee every day, and their body becomes accustom to having its presence in its system, this is not true for most 12-14 year olds. This experiment however (like most high school labs) has many possible points of error. In order to get a more accurate answer to this question, a large mass of people need to be tested, rather than just two per age group. Also, people have different metabolisms, skills, and reactions to caffeine. For some individuals caffeine has little to no affect on them, while others it can drastically change their results. One more possible source of error is that these are computer tests, people can simply get better at them with practice, and not every test is guaranteed to be the same each time, in fact I had multiple participants argue that one person's test appeared easier than others. These results can be applied to our lives when we think about what we are putting into our bodies. If you are an adult and caffeine isn’t benefitting your brain the way you think it should, then you are really just filling your body with a drug and most likely feeding an addiction.