I used something like this to study finger placement on touch screen keyboards in the early 2010s. You would type a prompt without any typos appearing regardles

I used something like this to study finger placement on touch screen keyboards in the early 2010s. You would type a prompt without any typos appearing regardless of how inaccurately you pressed the keys. I would think it helped with touch retargeting eventually though I was just an intern. I wish that Google pixel did it better as I always have issues pressing period instead of spacebar and other annoying things.