Do teenagers have faster hand-eye coordination than adults? If reaction speed only improved with age, older athletes would always outperform younger ones. A simple computer game can test whether that is true. You recruit 10 males and 10 females at age 15, plus 10 males and 10 females at age 30. Each person plays the same action game three times in a quiet room. You record the highest level they reach out of their three attempts. By comparing average high scores across the four groups you can see how both age and gender relate to hand-eye coordination.