Does anyone know of a study that collected data on the timing between various key strokes? I'm doing a research project on time series analysis of unknown keystrokes. Just counting alpha-numeric, capitals, and special characters, that comes to about 92 choose 2 relationships, and we're looking for natural typing, and we don't have the ability to collect that information on keystrokes, at least ethically. Any suggestions would be helpful, I don't even know how to phrase this to search on google. I tried "touch-typist timing," "timing between keystrokes," and similar combinations along these lines.