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Cognitive Evaluation of Haptic and Audio Feedback in Short Range Navigation Tasks

  • Manuel Martinez
  • Angela Constantinescu
  • Boris Schauerte
  • Daniel Koester
  • Rainer Stiefelhagen
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8548)

Abstract

Assistive navigation systems for the blind commonly use speech to convey directions to their users. However, this is problematic for short range navigation systems that need to provide fine but diligent guidance in order to avoid obstacles. For this task, we have compared haptic and audio feedback systems under the NASA-TLX protocol to analyze the additional cognitive load that they place on users. Both systems are able to guide the users through a test obstacle course. However, for white cane users, auditory feedback results in a 22 times higher cognitive load than haptic feedback. This discrepancy in cognitive load was not found on blindfolded users, thus we argue against evaluating navigation systems solely with blindfolded users.

Keywords

Sonification Haptics Navigation Assistive System Blind 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Manuel Martinez
    • 1
  • Angela Constantinescu
    • 2
  • Boris Schauerte
    • 1
  • Daniel Koester
    • 1
  • Rainer Stiefelhagen
    • 1
    • 2
  1. 1.cv:hci labKarlsruhe Institute of Technology Institute for Anthropomatics and RoboticsKarlsruheGermany
  2. 2.Study Center for the Visually Impaired StudentsKarlsruheGermany

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