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Hazard anticipation of young novice drivers - SWOV

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glucocorticoids is under the control <strong>of</strong> what is called the Hypothalamic-<br />

Pituitary-Adrenal (HPA) axis. The HPA axis can be activated by a wide<br />

variety <strong>of</strong> stressors. An important role <strong>of</strong> the HPA response to stressors is to<br />

restore the physiological balance to prevent overreaction <strong>of</strong> defence<br />

mechanisms to stress. How the HPA axis functions depends to a large extend<br />

on sex hormones (testosterone and oestrogen). There are marked differences<br />

in the production <strong>of</strong> sex hormones between boys and girls from puberty on.<br />

This could be the cause that in females there is an increased response <strong>of</strong> the<br />

HPA axis to stress with advancing age after the onset <strong>of</strong> puberty, while in<br />

males the response is decreased, possibly associated with increased<br />

testosterone levels (McCormick & Mathews, 2007).<br />

Considering the mentioned structural and functional differences between<br />

women and men that start to emerge at the onset <strong>of</strong> adolescence and<br />

continue to develop well into the third decade in life, both <strong>young</strong> male<br />

<strong>drivers</strong> and <strong>young</strong> female <strong>drivers</strong> probably take more risks in traffic than<br />

middle-aged <strong>drivers</strong> due to brain development. As the brains <strong>of</strong> <strong>young</strong><br />

female <strong>drivers</strong> mature faster than the brains <strong>of</strong> <strong>young</strong> male <strong>drivers</strong>, this<br />

tendency to take risks is stronger in <strong>young</strong> males than in <strong>young</strong> females.<br />

2.3.3. Personality<br />

Most <strong>young</strong> <strong>drivers</strong> will not experience a severe crash in the first years <strong>of</strong><br />

their driving carrier. In the Netherlands in 2008 less than one per thousand <strong>of</strong><br />

the licence holders (for a car) aged 18-24 was involved in a severe crash<br />

(crashes that result in at least one fatality or one person so seriously injured<br />

that hospitalization is required), source: Ministry <strong>of</strong> Infrastructure and<br />

Environment / Statistics Netherlands. Could it be that <strong>young</strong> <strong>drivers</strong> with<br />

certain personality traits are more risky <strong>drivers</strong> than <strong>young</strong> <strong>drivers</strong> with<br />

other personality traits? Ulleberg (2001) found that there were two groups <strong>of</strong><br />

<strong>young</strong> <strong>drivers</strong> (aged 18-23) that reported risky driving behaviour. The first<br />

high-risk group consisted mostly <strong>of</strong> <strong>young</strong> men who had low levels <strong>of</strong><br />

altruism and anxiety and high levels <strong>of</strong> sensation seeking and<br />

irresponsibility. These <strong>young</strong> <strong>drivers</strong> showed risky behaviour not so much,<br />

because they were angry with other road users but because dangerous<br />

driving was considered thrilling and because they did not care so much<br />

about the wellbeing <strong>of</strong> others. The second high-risk group also scored high<br />

on sensation seeking, but in contrast to the first group, this group had high<br />

scores on aggression, anxiety and driving anger. These <strong>young</strong> <strong>drivers</strong><br />

seemed to tolerate little from other road users and got angry easily. What<br />

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