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Long trajectory for the development of sensitivity to global and biological motion.
MedLine Citation:
PMID:  22010893     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We used a staircase procedure to test sensitivity to (1) global motion in random-dot kinematograms moving at 4° and 18° s(-1) and (2) biological motion. Thresholds were defined as (1) the minimum percentage of signal dots (i.e. the maximum percentage of noise dots) necessary for accurate discrimination of upward versus downward motion or (2) the maximum percentage of noise dots tolerated for accurate discrimination of biological from non-biological motion. Subjects were adults and children aged 6-8, 9-11, and 12-14 years (n = 20 per group). Contrary to earlier research, results revealed a similar, long developmental trajectory for sensitivity to global motion at both slower and faster speeds and for biological motion. Thresholds for all three tasks improved monotonically between 6 and 14 years of age, at which point they were adult-like. The results suggest that the extrastriate mechanisms that integrate local motion cues over time and space take many years to mature.
Authors:
Bat-Sheva Hadad; Daphne Maurer; Terri L Lewis
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Publication Detail:
Type:  Journal Article     Date:  2011-09-09
Journal Detail:
Title:  Developmental science     Volume:  14     ISSN:  1467-7687     ISO Abbreviation:  Dev Sci     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-10-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9814574     Medline TA:  Dev Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1330-9     Citation Subset:  IM    
Copyright Information:
© 2011 Blackwell Publishing Ltd.
Affiliation:
Department of Psychology, Ben Gurion University of the Negev, Israel  Department of Psychology, Neuroscience & Behaviour, McMaster University, Canada.
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