ABSTRACT
Interacting with an IVIS whilst driving creates a dual-task scenario because the driver must share attention between secondary IVIS tasks and the primary driving tasks. In order for predictions to be made about the usability of IVIS in such contexts, data relating to the way drivers manage the demands between primary (driving) and secondary (IVIS) tasks need to be modelled effectively (Harvey et al., 2011b). The aim of this study was to extend the CPA method for the prediction of task times in a dual-task environment, that is, the time taken to complete secondary tasks whilst undertaking driving tasks simultaneously. This would give an indication of the effect of driving on secondary task interaction times, and this is a factor that affects the usability of an IVIS when used whilst driving.
