Working Memory

Spatial
Addition

How it works

Two 5 × 5 grids appear sequentially. Recreate their sum in the answer grid.

  • empty + empty = empty
  • empty + gray = gray
  • gray + gray = black

Click a cell once for gray, twice for black, and three times to clear it.

18items
2failures allowed
5 secondsper pattern

Spatial addition

Item 1 of 18

0 failures
Memorize grid 1

Remember the positions of the gray dots.

Test Completed

Score: 0

Thank you for taking the test!