Rhythm
Keep the beat going.
Why humans are wired for rhythm
Beat keeping is one of the few skills almost every human shares and few other animals have. When you hear a steady pulse, motor regions of your brain synchronise to it automatically, even if you sit still. Rhythm tests how precisely you can convert that internal pulse back into action by continuing a beat after the reference stops.
The hard part is the silence
Tapping along while the beat plays is easy, because you are reacting. Continuing the beat after it stops is hard, because now you are predicting. Small errors compound. If you drift slightly fast on tap two, you are off for the rest of the round. The best scorers hold an internal tempo rather than chasing their own last tap.
How to keep tighter time
Lock the tempo in during the four lead-in clicks by counting or nodding with them. Tap from a relaxed wrist, not a stiff arm. Do not listen to your own taps and correct round by round; instead trust the internal pulse you set at the start. Steady beats chasing every time.