ABSTRACT
One topic of interest in the area of multisensory warning signal design is the relative effectiveness of unimodal versus bimodal and/or multimodal signals. Published studies have demonstrated mixed findings with regard to the superiority of multisensory over single channel information presentation. There is a growing body of empirical research comparing the effectiveness of unimodal feedback signals to multisensory feedback signals in a variety of different interface settings. A possible alternative account of the mixed multisensory facilitation effects reported in previous studies is in terms of the time-window-of-integration model put forward by H. Colonius and A. Diederich, given that the occurrence of multisensory integration is typically dependent on both the temporal and spatial configuration of the stimuli presented. The additional benefits attributable to attentional facilitation may only occur when the warning signal and target event locations match much more closely.
