quick medians with a narrow trial-to-trial spread
Fast and Steady
The signal arrived quickly, and your timing stayed compact.
在瀏覽器裡做十次計時：看到訊號就按，再在壓力下按對鍵。你會拿到以毫秒計的反應時間、做選擇讓你慢了多少，以及每一次試驗的紀錄。
簡單反應記錄一個視覺訊號到一個動作的延遲；選擇反應再加上正確的左右判斷。兩個中位數的差值會以「選擇成本」呈現。
兩次熱身後完成 5 次正式計時。等待訊號再反應；搶按會納入本次的品質檢查。
5 次正式計時。紅色或藍色訊號出現後選擇對應方向；選錯會保留紀錄並重做該次。
The signal arrived quickly, and your timing stayed compact.
Your first signal moved fast. Choice made the gap visible.
The first move was measured. The second decision stayed close.
This run was slower. The reason remains unknown.