Guides
How to read what you measured, and what actually moves the number.
Why your reaction time changes every time you measure it
Did you get slower, or did your hardware change? How to tell the two apart.
Will 144Hz actually make your reaction time faster?
1000÷Hz is not a delay. Separating frame interval, display and input.
The faster you press, the more you miss — the speed-accuracy tradeoff
Not faster, not more careful — a third option. The scoring rule changes the answer.
Typing practice — what should you actually repeat?
Retyping one passage mostly speeds up that passage. What to log, what to try.
Great at digits, terrible at 2-back — why?
The two tests ask different things — how much you hold, and how accurately you swap.
Top 3% of what, exactly?
Raw value, points, estimated top %, and ranking position are four different numbers.