Firm foundation in the main hci principles, the book provides a working


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Human Computer Interaction Fundamentals

Figure 4.25 A typical usage scene 4: Moving between views/stages and quitting the application 
by using the standard Android menu button interface.
Table 4.4 Initial Finalization of the Interface Design Choice for No Sheets
SUBTASK
INTERFACE DESIGN CHOICE
JUSTIFICATION
Invoking main 
functions
• Touch menu
• Menu items in red
• Familiar interface
• Catch attention
Selecting/changing 
song
• Scrolling menu
• Return to main menu upon 
selection
• There may be many songs
Selecting/changing 
tempo
• Scrolling radio buttons
• Return to main menu by OK 
button
• Only one tempo is chosen at a 
given time
Showing instruction
• Show a one page/screen 
image with condensed 
instructional content
• Present condensed content
Playing/pause (view)
• Show progress bar on top
• Control interface in the bottom
• Provide sound beeps and 
vibration for first and second 
beat
• Color-code different types of 
information
• Show status
• Familiar interface
• Use multimodal feedback for 
redundancy
Moving forward (+)
• Forward button on the right
• Cultural consideration (moving 
from left to right)
• Show status through progress bar
Moving backward (−)
• Backward button on the left
• Cultural consideration (moving 
from left to right)
• Show status through progress bar
Quitting
• Use platform button
• Use platform (e.g., Android) 
guideline


81
H C I D E S I G N
This will become more apparent as we evaluate the initial prototype 
and revise our requirements and design for No Sheets 2.0 (presented 
in Chapter 8). Figure 4.26, based on the use of a commercial wire-
framing tool, shows the final interface look and the interaction flow.

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