Repeated target selection
For 60 seconds, select filled circles and ignore five similar symbols. The 24-cell board changes after a choice or every three seconds, while missed targets and distractor clicks remain visible.
Complete a mixed short task that combines target detection and response control.
Concentration score
35
Hits
0
Misses
0
False clicks
0
Accuracy
0%
Average response
0 ms
This is a repeated visual target-selection game. It differs from Symbol Search, which asks whether one target is present in a small candidate set, and from Sustained Attention, which shows a single stream over time.
The displayed concentration score is a page-specific blend of target accuracy, average timing, and false-click penalties. It is not a standardized concentration percentile.
Each board contains 24 symbols with an approximate target probability. Selecting any filled circle counts one hit and immediately replaces the board; selecting a distractor counts a false click and also replaces it.
Every three seconds, all still-visible targets are added to misses before a fresh board appears. Multiple targets can exist on one board, so replacing it after one hit leaves the others as part of the task design.
Target accuracy uses hits divided by hits plus misses. A reaction component is derived from elapsed time since the board appeared, and each distractor click subtracts a penalty. Review the underlying counts instead of relying on the combined number.
Runs can contain different target counts, and the timing includes scanning and pointer movement. The score cannot diagnose an attention condition or establish real-world concentration ability.
Recent score, accuracy, and average timing summaries are saved in this browser. Clearing site data deletes them.
These questions stay tied to the visible content on this page.
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