Document Detail

Information used in judging impending collision.
MedLine Citation:
PMID:  530806     Owner:  NLM     Status:  MEDLINE    
Many subhuman species and human infants, children, and adults can use two-dimensional information of relative rate of angular-size change to anticipate collisions between the self and approaching objects or surfaces. But extant studies have not determined what information is used when subjects view simulated approach events providing two-dimensional information and three-dimensional information (distance and distance change), as well as lower-order visual information contained in real approach events. Three experiments suggest that, given these several possibilities, adults' judgments of collision time are best predicted by two-dimensional spatiotemporal values which are invariant over object sizes, distances traversed, approach velocities, and several lower-order variables such as absolute angular size. However, collision time is substantially underestimated, with absolute amount of underestimation increasing as a function of actual time-to-collision. Large constant errors and loss of judgment linearity beyond about 10 s to contact time suggest that current models of human performances based on use of time-to-collision information require modified assumptions of operator efficiency.
W Schiff; M L Detwiler
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perception     Volume:  8     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1979  
Date Detail:
Created Date:  1980-04-23     Completed Date:  1980-04-23     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  647-58     Citation Subset:  IM    
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MeSH Terms
Depth Perception
Distance Perception*
Motion Perception*
Size Perception
Time Perception

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

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