Same or Different?
Compare two symbol strings and decide whether they are exactly the same. The differences get subtler as the run progresses.
Spot the tiny change.
Accuracy first. You have 3 seconds per comparison; unanswered rounds count as misses.
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How to play
Two short strings appear side by side. Choose Same only when every symbol and position matches. In Different rounds, exactly one position changes. Each comparison has a 3-second countdown.
For entertainment and visual-attention practice, not a standardized cognitive or medical assessment.