How fast does reaction time decline with age?
The short answer
Reaction time declines at approximately 2–4ms per year after age 25, with the rate accelerating significantly after 60. By age 70, the average simple visual RT is around 400ms — compared to a peak of ~238ms at age 20–24. This reflects declining myelination integrity and reduced dopaminergic signalling speed.
The data
| Age group | Average RT | Change from peak |
|---|---|---|
| 16–19 | 245ms | Near peak |
| 20–24 | 238ms | Peak |
| 25–29 | 241ms | +3ms |
| 30–39 | 255ms | +17ms |
| 40–49 | 278ms | +40ms |
| 50–59 | 310ms | +72ms |
| 60–69 | 354ms | +116ms |
| 70+ | 401ms | +163ms |
Good news: Physically active older adults consistently outperform sedentary younger adults on reaction time. A fit 60-year-old can have RT comparable to a sedentary 40-year-old. Exercise is the most effective known intervention for slowing RT decline.
What it means for you
Track your RT annually with the Reaction Time test. A consistent decline faster than ~5ms/year is worth noting. Combining it with the MoCA test gives you a more complete picture of cognitive aging.
Medical disclaimer
This content is for educational purposes only and is not medical advice. Scores from online tests are not diagnostic - if you are concerned about symptoms such as memory loss, attention problems, or cognitive decline, consult a qualified clinician.
Screen your cognitive health
Free — no account needed — 8 domains in 10 minutes.
Quick Answer
Reaction time declines approximately 2–4ms per year after age 25, accelerating after 60. By age 70, the average RT is around 400ms vs 238ms at the peak (age 20–24). This reflects declining myelin sheath integrity and reduced dopaminergic function.
Related Test
More Questions
Go deeper
The Science Page
Peer-reviewed research and full methodology.