Perform the following test on several classmates. Prepare a card of simulated pushbuttons...

Perform the following test on several classmates. Prepare a card of simulated pushbuttons with the printed commands ON, OFF, LEFT, RIGHT, UP, DOWN, TURN LEFT, TURN RIGHT, and STOP. Prepare a second card in which the location and size of the buttons are the same, but the printed words have been replaced with the visual symbols shown in Figure 5.18.

Now devise a set of keystroke sequences that simulate the navigation of a remote-control robot around a fictitious maze. Ask 10 or more friends to press the simulated buttons upon your verbal commands. Keep track of how much time it takes each person to complete the sequence. Which do you think will lead to a faster reaction time: the printed keys or the graphically labeled keys?

Figure Visual commands for up, down, etc.