Document Detail

Perceptual information for the timing of interceptive action.
MedLine Citation:
PMID:  2235289     Owner:  NLM     Status:  MEDLINE    
Time-to-contact is an important quantity for controlling activities which involve the timing of interactions with objects and surfaces in motion relative to an observer. Two alternative means for obtaining perceptual information that might be used to obtain the time-to-contact required to correctly time an interaction have been contrasted: a method based on the perception of distance and velocity, and a method due to Lee involving a perceptual variable called tau. A monocular version of the first method is presented and shown to place a highly unrealistic and arbitrary limitation on the capabilities of the visual system. The second method is reviewed and its limitations discussed. Several means by which these limitations can be overcome are presented. Recently reported results from experiments which involved catching self-luminous balls in the dark are interpreted in terms of timing information available to the subject, and the notions of intermodal and multimodal timing information are introduced. Finally, the possibility that timing information is available to an observer which does not involve the variable tau is considered. It is concluded that many questions regarding the perception of time-to-contact remain unresolved and that much empirical research remains to be done.
J R Tresilian
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Perception     Volume:  19     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1990  
Date Detail:
Created Date:  1990-12-07     Completed Date:  1990-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  223-39     Citation Subset:  IM; S    
Department of Psychology, University of Edinburgh, Scotland.
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MeSH Terms
Distance Perception
Motion Perception*
Psychomotor Performance*
Pursuit, Smooth
Time Perception*

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

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