Now that gave you a lot of information while someone was typing, and what they did then is used advanced artificial intelligence techniques called machine learning to have a training phase, and so they got most likely grad students to type in a whole lot of things, and to learn, to have the system use the machine learning tools that were available to learn what it is that the people were typing and to match that up with the measurements in the accelerometer.
Dette gav dem en masse information mens nogen tastede, og hvad de gjorde var  at anvende en avanceret kunstig intelligensteknik kaldet maskinlæring til at have en træningsfase, hvor de havde en masse studerende til at taste en masse ind, og de satte systemet til at bruge dette maskinlæringsværktøj som var istand til at lære hvad folkene tastede, og de sammenlignede dette med målingerne fra accelerometeret.