A demanding task.
A simple place to practice.

The effort should go into the game—not into working out the controls.

Understand it before you start.

“Compare N steps back” is a short rule, but it is not always obvious at first. The visual example shows the comparison. The guided lesson lets you try it without a timer.

Start with a round.

Choose N, complete a round, read the result, and play again. The game runs in your browser. It needs no account and sends no scores to a leaderboard.

Give longer practice a home.

The free iPhone app keeps your round history and progress, with friends and leaderboards. The browser stays a simple, account-free place to try Dual N-Back.

Keep the evidence visible.

It should be easy to find both the research and its limits. Our research page separates performance on N-Back from claims about other abilities.