The impact of interface modality on police officers' visual behaviour when using an in-vehicle system

Ashleigh Filtness, Paraskevi Mitsopoulos-Rubens, Michael Graeme Lenne

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


Background: Standard operating procedures state that police officers should not drive while interacting with their mobile data terminal (MDT) which provides in-vehicle information essential to police work. Such interactions do however occur in practice and represent a potential source of driver distraction. The MDT comprises visual output with manual input via touch screen and keyboard. This study investigated the potential for alternative input and output methods to mitigate driver distraction with specific focus on eye movements. Method: Nineteen experienced drivers of police vehicles (one female) from the NSW Police Force completed four simulated urban drives. Three drives included a concurrent secondary task: imitation licence plate search using an emulated MDT. Three different interface methods were examined: Visual-Manual, Visual-Voice, and Audio-Voice (?Visual? and ?Audio? = output modality; ?Manual? and ?Voice? = input modality). During each drive, eye movements were recorded using FaceLAB? (Seeing Machines Ltd, Canberra, ACT). Gaze direction and glances on the MDT were assessed. Results: The Visual-Voice and Visual-Manual interfaces resulted in a significantly greater number of glances towards the MDT than Audio-Voice or Baseline. The Visual-Manual and Visual-Voice interfaces resulted in significantly more glances to the display than Audio-Voice or Baseline. For longer duration glances (>2s and 1-2s) the Visual-Manual interface resulted in significantly more fixations than Baseline or Audio-Voice. The short duration glances (
Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Driver Distraction and Inattention
EditorsMichael Regan, Trent Victor
Place of PublicationSweden
PublisherChalmers University of Technology
Pages1 - 15
Number of pages15
Publication statusPublished - 2013
EventInternational Conference on Driver Distraction and Inattention (DDI 2013) - Lindholmen Science Park, Gothenberg, Sweden
Duration: 4 Sep 20136 Sep 2013
Conference number: 3rd


ConferenceInternational Conference on Driver Distraction and Inattention (DDI 2013)
Abbreviated titleDDI 2013
Internet address

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