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IST-507802 TALK
D6.4 (Part I) 25 January 2007 Page 60/96
The main disadvantages were the safety aspects like ´eyes off road´, ´hands off steering wheel´
and ´searching by hand´. Since the first option was not included in the baseline study, the related
options (´searching by hand´, ´searching by eyes´) were presumably pronounced more frequently
than in the present study.
As other disadvantages of the manual input similar aspects were noted, like searching iDrive
button and display cursor, position of the iDrive button too far backward.
6. Advantages of manual input
100%
95%
80%
Percent Subjects
80%
SAMMIE
62%
60%
Baseline
50%
38%
40%
15%
10%
20%
10%
0%
rec
cor
m
ste
t sy
rea
n
ctio
i ce
cho
l
fr om
ist
by h
use
an d
er s
oth
7. Disadvantages of manual input
100%
Percent Subjects
80%
76%
SAMMIE
Baseline
55%
60%
40%
20%
55%
38%
38%
29%
19%
10%
20%
15%
10%
0%
.
ad
es
and
tion
r. W
ff ro
y ey
yh
unc
tee
so
gb
gb
to f
ff s
n
n
i
i
o
g
eye
h
h
rc
rc
ds
tin
sea
sea
han
rela
oth
ers
Figure 64: Answers to the question “6./7. Which of the following aspects represented advantages /
disadvantages of manual input for you in relation to speech input?”
The following Figure 65 represents the answer frequencies concerning advantages and
disadvantages of the multimodal input. The most frequently pronounced advantage concerned
avoiding the problems of the other modality, which was pronounced by nearly all Subjects (This
question was not asked in the baseline study.) The next frequently pronounced option was ´free
choice of the operation mode´. I.e. a main motivation for SAMMIE – the free option of input
modality – was felt positively by a considerable part of the sample. More than the half of the
Subjects pronounced the aspects of adaptation to traffic and tasks.
Compared to the advantages, there were much less disadvantages pronounced. The main
disadvantage was the uncertainty as to which task was feasible by which input device, which was
more severe in the baseline study. This result is somehow astonishing, since all but one task
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