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optimal. Indeed, all that is necessary in this case is to go down the corridor in the
only possible direction, and the user will inevitably end up at his platform of
destination, without the risk of making a mistake.
- When the user starts from the middle of the corridor (landmark 1), the average
length in our experiments was 2.75: the journeys are far from being optimal, as the
user can choose either direction, and therefore has a one in two chance of making a
mistake.
Figure 10.17.
Static display of a departing train on a given platform
Subject
Start
Dst
Movement
L
U
L
O
R
a
2
E
2 → E
1
1
1.0
1 → D, D → C, C → B, B → A, A
,
A → B, B → C, C → D, D → E
b
1
E
9
2
3.5
c
0
E
0 → A, A → B, B → C, C → D, D → E
5
5
1.0
A → D, D → C, C → B, B → A, A
,
A → B, B → C, C → D, D → E
d
1
E
9
2
3.5
1 → D, D → E, E
, E → D, D → C,
C → B
a
1
B
6
3
2.0
b
2
B
2 → E, E → D, D → C, C → B
4
4
1.0
1 → D, D → E, E
, E → D, D → C,
C → B
c
1
B
6
3
2.0
d
0
B
0 → A, A → B
2
2
1.0
a
0
C
0 → A, A → B, B → C
3
3
1.0
b
0
C
0 → A, A → B, B → C
3
3
1.0
c
2
C
2 → E, E → D, D → C
3
3
1.0
d
2
C
2 → E, E → D, D → C
3
3
1.0
Table 10.4.
Results of the experiment searching for directions with the help of static screens.
The double horizontal lines are used to separate the different series of experiments
