Magnitudes
Judge which side has more, first with dots and then with fractions
What it looks at
How well you judge amounts at a glance: the dots are far too quick to count, so you have to estimate a proportion, and the fractions ask for the same judgement in numbers. Every trial has a right answer.
How to play
The first part shows two panels of dots. One colour is marked in the key above them; choose the panel where that colour takes the bigger share of the dots. The dots are only on screen for 1.5 seconds, and you have 5 seconds from when they appear.
The second part shows two fractions. Choose the larger one, again within 5 seconds. There are 40 trials in each part, and they get harder as the two amounts move closer together.
- ←FChoose the left one
- →JChoose the right one
Tap the panel or the fraction you choose
This recreates the published format from public descriptions, and the exact settings aren't public
Involves brief flashes, never more than three a second
AccessibilityColours, motion, text size
- Colour-blind-safe colours
- Reduce motionFollowing your device setting
- Larger text and shapes