The purpose of this study was to investigate the effects of caffeine on reaction time, as measured by PEBL2 software. To test this relationship, participants were measured across three tests within the PEBL2 software, with one group of participants receiving a 300 mL dose of caffeinated coffee before testing, and another receiving a 300 mL dose of a decaffeinated coffee. It was hypothesized that the participants who received a dose of caffeinated coffee would perform better and thus have faster reaction times than those who received the decaffeinated control. The results did not support the hypothesis: the mean response time was the same across the caffeinated and decaffeinated conditions. The results of this study are discussed in relation to other findings on the effects of caffeine on performance, specifically the relationship between caffeine and reaction time.
