Fitts's law has been shown to apply under a variety of conditions; with many different limbs (hands, feet, the lower lip, head-mounted sights), manipulanda (input devices), physical environments (including underwater), and user populations (young, old, special educational needs, and drugged participants).
Fitts's law has been shown to apply under a variety of conditions; with many different limbs (hands feet the lower lip head-mounted sights) manipulanda (input devices) physical environments (including underwater) and user populations (young old special educational needs and drugged participants)