How Does Reaction Time Change With Age?
General age trends in reaction time, individual variation, and the factors that affect results more than age.
The general trend
Simple reaction time tends to be fastest in the late teens to early twenties and gradually slows with age. This is only an average trend, and variation within any age group is large.
What matters more than age
Sleep, caffeine, fatigue, focus, and your device and input method strongly affect a single measurement. The same person can vary by more than 50ms depending on condition.
How to use it
Rather than comparing yourself to an age average, watch your own average measured consistently on the same setup. Testier's recent-score chart shows that change over time.
These tests are for entertainment and self-improvement purposes only. They are not medical or professional assessments.