INTERACTION DESIGN PRINCIPLES FOR INTERACTIVE ...

(a) (b)
Figure 5.15 The View His & Her Body Test (a) and (b)
The poll in Figure 5.16, from C.S.I. Interactive, asks viewers: “Do you believe
Dominic Kretzker is telling the truth?” The question, which is synchronized with the
broadcast, is relevant to the story occurring at the moment and works to draw its audience
deeper into the tension of the plot. The real-time feedback (85% Yes vs. 15% No) is
extremely satisfying for the viewers and creates an instantaneous community surrounding
the suspenseful premise of the program.
Figure 5.16 C.S.I. Interactive Poll
The “Create your own roller coaster” function from Discovery’s Extreme Rides
application, which gives users a great sense of agency, also allows users to rate each
other’s creations (see Figure 5.17). The more iTV applications allow users to create their
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