IEEE Consumer Electronics Magazine - July 2018 - 31

Tester 1

Tester 2

Tester 3

Individual

Individual

Individual

t1

Individual
"I Like"
Guest

Host

Collaboration
Tester 2
Tester 3

t2

Host

Guest

Host

Collaboration
Tester 1
Tester 2
Tester 3

Tester 1, Tester 3
"I Leave"

"I Like"
Guest

Collaboration

Guest

Individual

Collaboration
Tester 1, Tester 3

t3

t4

Time Line

FIGURE 4. A time line of the walk-through featuring three users. In the different times, the time line details the type of collaboration
for each user.

Figure 5(a) displays users working individually (see state 1
in Figure 2). Note that users have different products in their
own corresponding panels. In this state, users can continue to
perform critiques individually and find a desired product, or
they can search for another user to initiate a collaboration.
Figure 5(b) shows that Tester 2 likes the product shown in
Tester 3's panel and decides to start a collaboration by pressing the I like button on Tester 3's display panel (see number
5 in Figure 3). Afterward, Tester 2 and Tester 3 move to the
collaborative recommendation (state 2), in which Tester 3 is
called the host user (u h) and Tester 2 is designated as the
guest user (u g). Note that the name of the guest user, Tester 2,
is shown above the collaborative buttons on the panel of Tester 3. Additionally, the panel of Tester 2 is unavailable to
other users, and it depicts the product recommendation that is
currently given to Tester 3. Figure 5(b) indicates that users
are currently using the chat to decide the next critique to perform [shown in the bottom left corner of Figure 5(b)]. Once
they agree that they want a cheaper Smartphone, u h performs
the critique, and the new recommended product is shown on
both panels.
In Figure 5(c), Tester 3 notifies Tester 2 that he/she wants to
start a collaboration with another tester, Tester 1. In this situation, Tester 2 could press the "I leave" button to finish the collaboration with Tester 3; however, in this case, Tester 2 does not
press it, meaning that Tester 2 also wants to collaborate with
Tester 1. As a result, when Tester 3 presses the "I like" button of
Tester 1, then Tester 2 (thus far, the guest of Tester 3) automatically becomes the guest of Tester 1 and is teleported by default
to Tester 1's panel, as shown in Figure 5(c). At this point the host
is Tester 1, and Tester 2 and Tester 3 are the guests. Figure 5(c)
shows the three users talking to each other to reach a consensus
over the next critique to be applied. All testers have the same
product in their panels, and every critique performed by the host
will be updated in the user model of every guest user. Note that
the only remaining active panel for performing critiques or leaving the collaboration is the one that belongs to Tester 1.
Suppose that, before performing any critique, Tester 2 presses the "I leave" button on the panel of Tester 1. Figure 5(d)

(a)

(b)

(c)

(d)

FIGURE 5. The scenes of the 3-D VW, ranging from individual to
collaborative interactions. (a) Three users work individually, each
with his/her own panel (t1 in Figure 4). (b) Tester 2 likes the product
on Tester 3's panel and presses the "I like" button. Tester 3 and Tester 2 collaborate, and they use chat messages to choose a critique
(t2 in Figure 4). (c) Tester 3 decides to collaborate with Tester 1; Tester 2 is also a guest. All users collaborate, and they use chat messages to choose a new critique (t3 in Figure 4). (d) Tester 2 decides to
press the "I leave" button (t4 in Figure 4).

July 2018

^

IEEE Consumer Electronics Magazine

31



Table of Contents for the Digital Edition of IEEE Consumer Electronics Magazine - July 2018

Contents
IEEE Consumer Electronics Magazine - July 2018 - Cover1
IEEE Consumer Electronics Magazine - July 2018 - Cover2
IEEE Consumer Electronics Magazine - July 2018 - Contents
IEEE Consumer Electronics Magazine - July 2018 - 2
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