The gold standard working memory task. Watch where colored squares appear, and press Match when the current position is the same as N steps ago.
Very Easy (1-Back (Slow))
Match if current position = 1 step ago. Slower pace with extended response time.
Easy (1-Back)
Match if current position = 1 step ago
Medium (2-Back)
Match if current position = 2 steps ago
Hard (3-Back)
Match if current position = 3 steps ago
Expert (3-Back (Fast))
Match if current position = 3 steps ago. Faster stimulus pace and shorter response window.
Scientific Background
Based on: N-Back Working Memory Paradigm (Kirchner & undefined, 1958)