👀 Spot the Change
How quickly you notice a change. About 1½ minutes.
Two pictures flicker back and forth. Tap the one thing that changes.
About 1½ minutes. The first round is an easy practice, and the picture flickers quickly.
Why does this happen?
Normally a change catches your eye straight away, because anything that moves or pops up pulls your attention to it.
Put a quick blank in between the two pictures and that pull is gone. Now you have to check things one by one, and you can only keep track of a few at a time. This is called change blindness.
So even a big change, like an object vanishing, can sit in plain sight for several seconds. It happens to everyone, and it's why magicians and film editors can get away with so much.
How it's measured
Each round shows a grid of objects that flickers: picture, blank, slightly different picture, blank, and so on. Exactly one object changes: it swaps, vanishes, appears or turns.
The clock starts with the first flicker and stops when you tap the right spot. Each wrong tap adds 1 second. If 15 seconds pass, the change is shown and that round counts as 15 seconds.
There's one easy practice round with no blank, so you can see what a change looks like. Your score is your average time over the 6 rounds after it.
Your results and history are saved in this browser. Each finished score is also sent to us anonymously (just the game, the score and whether you used a phone or a computer; no name, no account) so everyone can see how they compare. Just for fun: not a medical, IQ or hiring test.
More Brain Breaks
- ⚡ Reflex: how fast you react
- 🎨 Colour Clash: how well you override autopilot
- 🎯 Arrow Focus: how well you block out distractions
- 🔍 Odd One Out: how fast you scan a busy scene
- 🧠 Number Memory: how quickly you search your short-term memory
- 🔄 Twist It: your mind's eye for shapes
- 👁️ Eye Tricks: how easily your eyes get fooled