de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Poster

Interaction of local and global landmarks for route finding in virtual environments

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83928

Geiger,  SD
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84072

Mallot,  HA
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83934

Gillner,  S
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Geiger, S., Mallot, H., & Gillner, S. (1998). Interaction of local and global landmarks for route finding in virtual environments. Poster presented at 1. Tübinger Wahrnehmungskonferenz (TWK 98), Tübingen, Germany.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-E8DF-2
Abstract
Spatial behavior in humans and animals includes a wide variety of behavioral competences that make use of many sensory cues, including vision. The visual input contains various cues about the observers current position (e.g., from views and local landmarks), the compass direction (e.g., provided by global landmarks), and egomotion (e.g., from optic flow). Here we investigate the role of global vs. local landmarks in a route finding task. If navigation relies more on ‘global’ landmarks for a route finding task then an allocentric description should be remembered; such as “When you reach the church square, go towards the tower on the mountain”. Alternatively, ‘local’ landmarks could guide navigation decisions by view-movement associations; e.g. “When you come to the church, turn right”. Evidence for the last strategy was presented by Gillner and Mallot (Journal of Cognitive Neuroscience, in press). We performed an experiment in a virtual environment called “Hexatown”. Hexatown consists of a regular hexagonal grid of junctions joined together by streets. At each junction there are three buildings, or other objects. Additionally, we provide global direction or compass information by placing six global landmarks distributed equally on a mountain range surrounding Hexatown. Subjects navigated in Hexatown by pressing the buttons of a computer mouse. According to their movement decisions, egomotion was simulated. Subjects had to learn the route back and forth between two specific buildings. Awareness of global landmarks was assessed by an additional pointing task. In the test-phase individual junctions were approached and the subjects’ movement decision was recorded. Two conditions were used: a ‘consistent’ condition, which was the same as in the training phase, and a ‘conflict’ condition. Conflict was produced by transposition of objects such that the global and local strategies predicted different movement decisions. In the consistent condition, i.e., with unchanged objects, 20 subjects made 85 correct decisions out of a total of 160. In the conflict condition, 77 of the decisions were in agreement with the local and 23 with the global strategy. This supports our previous finding that local views play a dominant role in making route judgements. In a control experiment we tested whether subjects could use the global landmarks at all. We reduced the local information in the maze and instructed the subjects to attend to the global landmarks. In this case, 76 of the 80 decisions were consistent with global landmark information. Since no local information was provided in this control experiment the remaining 24 of the decisions were errors. We conclude that subjects prefer local landmarks when available, but are also able to use global landmarks for route finding, when they are instructed to attend to them.