Assisting the older driver - SWOV

Assisting the older driver
My judgement of information on … is: (please place an X on every line)
1 useful ___ ___ ___ ___ ___ useless
2 pleasant ___ ___ ___ ___ ___ unpleasant
3 bad ___ ___ ___ ___ ___ good
4 nice ___ ___ ___ ___ ___ annoying
5 effective ___ ___ ___ ___ ___ unnecessary
6 irritating ___ ___ ___ ___ ___ likeable
7 assisting ___ ___ ___ ___ ___ worthless
8 undesirable ___ ___ ___ ___ ___ desirable
Table 8.4. Nine items of the composite questions.
Other questions that were included in the questionnaires related to
difficulties participants generally encounter while driving, comfort systems
they have installed in their car (radio, telephone, navigation system), use of
electronic devices in daily life (e.g., teletext, Internet, mobile phone, ticket
machine, cash dispenser), appreciation of the way information was provided
by the support system (audibility, comprehensibility, timing,
trustworthiness), and willingness to buy and use the system if it were on the
market.
8.3. Results regarding effects on workload and driver
performance
In this section, between‐subjects comparisons focus on functional age.
Within‐subjects comparisons focus on the effects of the driver support
system. First of all, baseline workload values for the different functional age
groups are established. After that, the effects of the driver support system are
described, starting with the overall effects of the system on workload and
general driving behaviour, followed by the effects per type of message. The
section ends with the results regarding participants’ appreciation of the
driver support system.
8.3.1. Baseline values for secondary task performance
Before focusing on the effects of driver support, baseline reaction times and
fractions missed of the different functional age groups were compared. For
the first baseline measurement of workload (without driving), mean reaction
times and fractions missed did not differ between the functional age groups
(see Table 8.5). However, when participants had to combine the peripheral
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