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Hazard anticipation of young novice drivers - SWOV

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Figure 3.6. Schematic representation <strong>of</strong> automatic and controlled behaviour (adapted<br />

from Brouwer & Schmidt, 2002).<br />

The bottom half <strong>of</strong> Figure 3.6 describes automatic processing in routine<br />

situations. In contrast to the model <strong>of</strong> Norman & Shallice (1986) the sensory<br />

information is subdivided into context aspects and content aspects. What is<br />

context and what is content is not a characteristic <strong>of</strong> the stimulus itself, but<br />

depends on the mapping between stimulus characteristics and schemata. As<br />

in Norman & Shallice's model, the basic assumption is that all behaviour is<br />

caused by the unfolding <strong>of</strong> schemata in interaction with external and internal<br />

stimuli. When a driver approaches an intersection, the perceived intersection<br />

(external) and the awareness that she or he is driving (internal) are the<br />

context and the perceived elements in the traffic scene <strong>of</strong> the intersection (e.g.<br />

moving vehicles) constitute the content. As in the model <strong>of</strong> Norman &<br />

Shallice (1986) schemata are activated and inhibited in the CS. The perceived<br />

information elicits triggers that energize schemata (the processes <strong>of</strong><br />

contention scheduling) and schemata can also activate and inhibit each other<br />

(lateral facilitation and inhibition between schemata). This results in the<br />

selection <strong>of</strong> the dominant schema for a particular moment in time. The<br />

dominant schema, if appropriate, helps the driver to 'read' the traffic<br />

situation and to predict and defuse the hazard, because it specifies where<br />

and when to look and what to do then. These interpretations based on the<br />

dominant schema and the actual information about perceived own speed<br />

and direction and the perceived speed and direction <strong>of</strong> other road users, are<br />

processed in order to select a response (e.g. braking). The box ‘basic<br />

93

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