Reaction Time Test
Test how fast you react to visual stimuli. Click or tap as quickly as possible when the box turns green.
You’ll complete 5 rounds, and your average reaction time will be displayed at the end. Slower or faster reaction times can reflect your alertness, fatigue, or even cognitive load.
Click "Start Test" to begin
Average reaction time: –
Tip: Try this at different times of day. Your brain processes reactions differently depending on the level of fatigue, focus, and your environment.
Related tool: Try our Stroop Effect Test to find out how well you cope with the Stroop effect.