How this task works

These suggested age ranges and difficulty settings have not been validated. Choose before starting; changing band requires a new session.

Look at the TARGET pair above the cards. Choose Present if any card contains both symbols in exactly the same order. Otherwise choose Absent. You do not need to discover a hidden pattern.

Each trial allows 15 seconds. Skip if needed. You can zoom and pan while the clock runs. There are three blocks of 12 attention trials, with a rest between blocks. These are variations of one task, not three different cognitive tests.

Unscored example — no timer

Target: ● ▲. Cards: ■ ■, ● ▲, ▲ ●. Is the target present?

Try the example before starting.