Document Detail

Infants' timing strategies to optical collisions: a longitudinal study.
MedLine Citation:
PMID:  17292779     Owner:  NLM     Status:  MEDLINE    
Blinking is a good indication of awareness to optical collisions in early infancy. In the current longitudinal study, infants were presented with the image of a looming virtual object approaching on a collision course under different constant velocities and constant accelerations. The aim was to investigate which timing strategies the infants used to determine when to make the defensive blink. Blinking when the virtual object reaches a threshold visual angle (angle-strategy) or angular velocity would result in difficulties with accelerating approaches, while blinking when the object is a certain time away (time-strategy) would enable successful responses to all approaches. Eleven infants were tested longitudinally at 22, 26, and 30 weeks. Five infants switched from an angle- to a time-strategy, while one infant switched from using angular velocity to a time-strategy. Five infants used a time-strategy already at 22 weeks. These findings show that with age there is an attunement in the perceptual systems of infants which makes them switch to better specifying variables, enabling them to successfully time their defensive blinking to impending optical collisions.
Nanna Sønnichsen Kayed; Audrey L H van der Meer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-12-06
Journal Detail:
Title:  Infant behavior & development     Volume:  30     ISSN:  1934-8800     ISO Abbreviation:  Infant Behav Dev     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-12     Completed Date:  2007-02-22     Revised Date:  2008-03-28    
Medline Journal Info:
Nlm Unique ID:  7806016     Medline TA:  Infant Behav Dev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  50-9     Citation Subset:  IM    
Developmental Neuroscience Laboratory, Department of Psychology, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
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MeSH Terms
Blinking / physiology*
Child Development / physiology*
Distance Perception
Longitudinal Studies
Motion Perception
Photic Stimulation
Reaction Time
Space Perception
Time Factors
Time Perception*
Visual Perception*

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

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