Specifications

43
interfaces warning against using just graphics he also warns against
just using one word to describe what in the menu (Norman 2003).
This is also something that appears in the projectors on-screen menu
as can be seen in picture
Menu Two. One of the most difficult tasks for
the users in our evaluation was changing the brightness of the
projector this was because of the poor cognitive affordance of the
menu.
Menu Two
Physical Affordance
Physical affordance is the design feature that helps users in
doing a physical action. It can also be applied to interfaces for
example a large button has good physical affordance because its size
helps user click on it more easily.
The remote control has poor physical affordance; the buttons
are very un-reactive and have little physical feedback. The physical
feedback is the direct feedback given from pressing down on the
button, for example a clicking sound could result if the user pressed
down correctly. On the remote control we evaluated there was no real
physical feedback. Another reason for the remote having poor
physical feedback was the position of the sensors on the actual
projector. There are two remote sensors on the projector but one of
the sensors on our projector appeared to be broken. Therefore the
users had to stand behind the projector in order to use the projector.
The users who stood in front of the projector at the start had to be
told they could only use the remote by stand behind it. This was one