Document Detail

Effects of context on a visual 3-D pointing task.
MedLine Citation:
PMID:  17357706     Owner:  NLM     Status:  MEDLINE    
We examined the effects of egocentric and contextual references on a 3-D exocentric pointing task. Large systematic deviations were found for the slant (angle in the horizontal plane). For most observers, the deviations were smaller when the veridical pointing direction was parallel to a wall. For some observers the size of the deviations was also dependent on whether the veridical pointing direction was frontoparallel or not. For the tilt (angle in the vertical plane), the deviations were smaller and less systematic. Hence, although observers show comparable systematic deviations, the way in which the presence of structure in an environment is used for judging positions of objects is observer-dependent.
Michelle J A Doumen; Astrid M L Kappers; Jan J Koenderink
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  36     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2007  
Date Detail:
Created Date:  2007-03-15     Completed Date:  2007-07-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  75-90     Citation Subset:  IM    
Helmholtz Institute, Physics of Man, Utrecht University, Princetonplein 5, NL 3584 CC Utrecht, The Netherlands.
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MeSH Terms
Depth Perception / physiology*
Field Dependence-Independence*
Judgment / physiology
Photic Stimulation / methods
Psychomotor Performance / physiology*
Space Perception / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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