  In order to reproduce human behaviour in dynamic traffic situations, a
computational representation of the requisite mental processes used to carry
out the complex driving tasks is required. A single cognitive factor has been
developed and forms a crucial component in our driver model. This cognitive
factor is composed of cognitive sub-factors: distraction, anticipation, stress,
and strain. It has been defined such that these sub-factors have a
multiplicatory relationship with one another. In addition, each of these
sub-factors comprises the visual, auditory, tactile-kinetic, and verbal
information channel individually. This results in a lattice-like network of
relationships, which can be expanded modularly in horizontal and vertical
directions. The conceptual topology and the characteristics of this
multiplicatory, operation-based cognitive factor are presented.
