Human–Computer Interaction

11

IntroduCtIon

order to rotate, the selected object is overlaid with and enclosed by a

transparent sphere, and the user drags on the surface of the sphere to

rotate the object inside. One might consider this rotation technique

to be metaphoric because it abstracts the interaction object into the

shape of a sphere, the most rotational object we know.

A natural or metaphoric interface (assuming that the metaphor is

not contrived) will also have affordance, a property (or additional cues)

that appeals to our innate perception and cognition, thus making it

so intuitive that the interface would require almost no learning [4]. In

the example of the A ...