Assisting the older driver - SWOV

Assisting the older driver
PDT reaction time
PDT fraction missed
Functional age
F
df
p
9.393
2, 36
0.001**
9.360
2, 36
0.001**
Baseline
F
df
p
98.831
1, 36
< 0.000001**
27.354
1, 36
0.000007**
Functional age x Baseline
F
df
p
6.325
2, 36
0.004**
10.709
2, 36
0.0002**
* p < 0.05; ** p < 0.01
Table 8.6. Results of mixed between‐within ANOVAs for baseline measurements.
8.3.2. General effect of driver support
The general effect of driving with the support system installed, was
determined by comparing the average workload at intersections while
driving with and without the support system installed, and by comparing
average speed and lateral position, number of crashes, number of route
errors and trip duration (see Table 8.7). In addition, general driving
performance at intersections was compared between drives with and without
driver support (i.e., waiting position, acceleration and speed). Paired
samples‐tests showed that driver support only affected one aspect of
workload for only two of the functional age groups. Functionally younger
drivers had longer reaction times while driving with the support system
installed (t(9) = ‐2.691, p = 0.025), and functionally middle‐aged drivers had
slightly higher fractions missed (t(18) = ‐2.074, p = 0.053). Subjective workload
was not affected by the support system. Driving performance at intersections
was also the same when driving with or without the support system
installed.
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