This study investigated the simple reaction time and the reaction time during a conflict of introverted and extroverted persons, looking to prove that there are significant differences in terms of reaction time between these two categories of people. 60 people of which 30 extroverted and 30 introverted completed the International Personality Item Pool test extraversion scale and were tested at the Complex Senzo-motorial Tester (CST-2). The conflict situation was created with red and green color stimuli. The research findings are also supported by previous researches which show that there are significant differences between introverts and extroverts regarding simple reaction time, and reaction time to a conflict to the color red and green, with a significantly higher reaction time for introverts than extraverts, but with significantly fewer mistakes. On the other hand, extraverts responded better to external stimuli, but are more likely to make mistakes in extreme situations, situations that can be created by themselves.