ABSTRACT
Table 1. Mean time [s] for single operation completion (per device focused and per task); standard deviation shown within parentheses (n = 20).
O pe
ra tio
n/ D
ev ic
e
Po in
tin g
at
la rg
e ta
rg et
s
Po in
tin g
at
m ed
iu m
ta rg
et s
Po in
tin g
at
sm al
lt ar
ge ts
D ra
gg in
g w
ith
le ft
b ut
to n
D ra
gg in
g w
ith
m id
dl e
bu tt
on
St ee
rin g
Model A times
0.500 (0.086)
0.519 (0.096)
0.688 (0.106)
1.403 (0.346)
1.344 (0.266)
2.856 (0.699)
Model B times
0.586 (0.084)
0.642 (0.102)
0.982 (0.220)
1.651 (0.316)
1.744 (0.346)
3.102 (0.530)
Model C times
0.577 (0.100)
0.602 (0.119)
0.797 (0.128)
1.770 (0.568)
1.709 (0.448)
3.052 (0.711)
Average of mean times
0.554 0.588 0.822 1.608 1.599 3.004
effectiveness and efficiency usability parameters (Lourenço et al., 2016).
