   How do you compare button taps?
  I am looking for a statistical method to take data points (time button pressed, how long button held down)for comparison against other data points of the same duration.For example if 100 people all tap their space bar multiple times for one minute and you have the data for the exact time they pressed down and released how would you compare the data to see which people have the most similar occurrence specific button taps?   
  Do you want to measure some kind of "rhythm" of the tapping or what isyour aim?   