Showing posts with label spatial frames of reference. Show all posts
Showing posts with label spatial frames of reference. Show all posts

Tuesday, 21 May 2013

The assessment of non visual maritime cognitive maps of a blind sailor: a case study

Simonnet, M., Vieilledent, S., Jacobson, D. and Tisseau, J. (2010) The assessment of non visual maritime cognitive maps of a blind sailor: a case study, Journal of Maps, v2010, 289-301. 10.4113/jom.2010.1087.

Abstract

Nowadays, thanks to the accessibility of GPS, sighted people widely use electronic charts to navigate through different kinds of environments. In the maritime domain, it has considerably improved the precision of course control. In this domain, blind sailors can not make a compass bearing, however they are able to interact with multimodal electronic charts. Indeed, we conceived SeaTouch, a haptic (tactile-kinesthetic) and auditory virtual environment that allows users to perform virtual maritime navigation without vision. In this study we attempt to assess if heading or northing “haptic” views during virtual navigation training influences non-visual spatial knowledge. After simulating a navigation session in each condition, a blind sailor truly navigated on the sea and estimated seamark bearings. We used the triangulation technique to compare the efficiency of northing and heading virtual training. The results are congruent with current knowledge about spatial frames of reference and suggest that getting lost in heading mode forces the blind sailor to coordinate his current “view” with a more global and stable representation.

Map - data Publication

Simonnet, M., Vieilledent, S., Jacobson, D. and Tisseau, J. (2010) Published Map. In Simonnet, M., Vieilledent, S., Jacobson, D. and Tisseau, J. (2010) The assessment of non visual maritime cognitive maps of a blind sailor: a case study, Journal of Maps, v2010, 289-301. 10.4113/jom.2010.1087.

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A Haptic and Auditory Maritime Environment for Non Visual Cognitive Mapping of Blind Sailors

M. Simonnet, R.D. Jacobson, S. Vieilledent and J. Tisseau. (2009) SeaTouch: A Haptic and Auditory Maritime Environment for Non Visual Cognitive Mapping of Blind Sailors. In K. Stewart Hornsby et al. (Eds.): COSIT 2009, LNCS 5756, pp. 212–226, 2009. Springer-Verlag Berlin, Heidelberg.

Abstract

Navigating consists of coordinating egocentric and allocentric spatial frames of reference. Virtual environments have afforded researchers in the spatial community with tools to investigate the learning of space. The issue of the transfer between virtual and real situations is not trivial. A central question is the role of frames of reference in mediating spatial knowledge transfer to external surroundings, as is the effect of different sensory modalities accessed in simulated and real worlds. This challenges the capacity of blind people to use virtual reality to explore a scene without graphics. The present experiment involves a haptic and auditory maritime virtual environment. In triangulation tasks, we measure systematic errors and preliminary results show an ability to learn configurational knowledge and to navigate through it without vision. Subjects appeared to take advantage of getting lost in an egocentric “haptic” view in the virtual environment to improve performances in the real environment.