The Role of Geographical Slant in Virtual Environment Navigation
We investigated the role of geographical slant in simple navigation and spatial memory tasks, using an outdoor virtual environment. The whole environment couldb e slanted by an angle of 4°. Subjects could interact with the virtual environment by pedaling with force-feedback on a bicycle simulator (translation) or by hitting buttons (discrete rotations in 60° steps). After memory acquisition, spatial knowledge was accessed by three tasks: (i) pointing from various positions to the learned goals; (ii) choosing the more elevated of two landmarks from memory; (iii) drawing a sketch map of the environment. The number of navigation errors (wrong motion decisions with respect to the goal) was significantly reduced in the slanted conditions. Furthermore, we found that subjects were able to point to currently invisible targets in virtual environments. Adding a geographical slant improves this performance. We conclude that geographical slant plays a role either in the construction of a spatial memory, or in its readout, or in both.
KeywordsVirtual Environment Slant Angle Return Path Path Type Global Landmark
Unable to display preview. Download preview PDF.
- Creem, S. H. and Proffitt, D. R. (1998). Two memories for geographical slant: Separation and interdependence of action and awareness. Psychonomic Bulletin & Review, 5:22–36.Google Scholar
- Hübner, W. and Mallot, H. A. (2002). Integration of metric place relations in a landmark graph. In Dorronsoro, J. R., editor, International Conference on Artificial Neural Networks (ICANN 2002), Lecture Notes in Computer Science. Springer Verlag.Google Scholar
- Janzen, G., Herrmann, T., Katz, S., and Schweizer, K. (2000). Oblique angled intersections and barriers: Navigating through a virtual maze. Lecture Notes in Computer Science, 1849:277–294.Google Scholar
- Levinson, S. C. (1996). Frames of reference and Molyneux’s question: Crosslinguistic studies. In Bloom, P., Peterson, M. A., Nadel, L., and Garrett, M. F., editors, Language and Space, pages 109–169. The MIT Press, Cambridge, MA.Google Scholar
- Mallot, H. (2000). Computational Vision. Information Processing in Perception and Visual Behavior, chapter Visual Navigation. The MIT Press, Cambridge, MA.Google Scholar
- Mochnatzki, H. (1999). Die Rolle von Hangneigungen beim Aufbau eines Ortsgedächtnisses: Verhaltensversuche in Virtuellen Umgebungen. Diploma thesis, Fakultät für Biologie, Univ. Tübingen.Google Scholar
- Proffitt, D. R., Bhalla, M., Gossweiler, R., and Midgett, J. (1995). Perceiving geographical slant. Psychonomic Bulletin & Review, 2:409–428.Google Scholar