That doesn’t resonate with my experience which is trackball > trackpoint > mouse >>> trackpad for precision and speed. In their marketing material from the ear

That doesn’t resonate with my experience which is trackball > trackpoint > mouse >>> trackpad for precision and speed. In their marketing material from the early 90s (the date of your study) Kensington used speed as a key argument. http://xahlee.info/kbd/kensington_expert_mouse_hist.html http://xahlee.info/kbd/kensington_expert_mouse_hist.html