Count the dots: a subitizing test
A few dots flash up for half a second. How many were there?
Try a practice roundPlay today’s fiveHow it works
A few dots flash up for half a second. Tap the button with how many there were. Three rounds, and a wrong answer costs 1 s.
What it measures
People can see the number of a small group instantly, without counting, an ability called subitizing. It usually tops out at around four items.
Beyond that you have to count or estimate, which is slower and less reliable in a brief flash.
What’s a good score?
In Reactdle, 900 ms or faster rates Sharp, up to 1.3 s is Steady, and slower is Sluggish.
Tips
- Look for patterns: dice-like groupings are easy to read.
- Trust your first impression on small numbers.
About Reactdle
Count Flash is one of twenty tests in Reactdle, a free daily reaction game. Every day everyone gets the same five tests, one from each kind: reflex, aim, brain, timing and words.