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user InterfaCe evaluatIon
Collision
Time
15
300
200
100
0
Sec
10
5
0
Trial
1
Trial
2
Trial
3
Trial
1
Trial
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Trial
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KeyBoard
G-Bar
KeyBoar
G-Bar
Figure 8.7 A case of a task-performance measurement: (1) nominal: a game interface using a
keyboard, and (2) new: a game interface using a new controller. Task completion time for navigating
a maze is measured using the respective interfaces and then compared to indirectly assess the ease
of interaction.
Figure 8.6 The initial (left) and redesigned (right) “play” activity/layer for No Sheets: The new
design after evaluation uses a landscape mode and fewer primary colors. The icons for fast-forward ...