Document Detail

Changes in infants' visual scanning across the 2- to 14-week age period.
MedLine Citation:
PMID:  2303772     Owner:  NLM     Status:  MEDLINE    
The characteristics of visual scanning over the 2- to 14-week age period were examined through repeated assessments conducted on a sample of 10 infants. Scanning patterns were measured using a bright-pupil corneal reflex system, and the stimuli consisted of various sets of static, moving, or flickering geometric figures. There appear to be a number of age-related changes in the dominant mode of visual scanning. At the youngest ages the infants' scanning often proved unrelated to the locations of the stimulus contours, and in instances where a stimulus figure was in fact attended the infants typically centered their regard on a single prominent feature. In contrast, as the infants grew older they more consistently directed their saccades toward stimulus contours, became increasingly disposed to scan between different stimulus features, and directed their saccades with increased accuracy. When a stimulus was flickering, however, the infants' scanning characteristics reverted to those typically found at younger ages. The mechanisms which might account for the effects of age and of stimulus quality on visual scanning are considered.
G W Bronson
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of experimental child psychology     Volume:  49     ISSN:  0022-0965     ISO Abbreviation:  J Exp Child Psychol     Publication Date:  1990 Feb 
Date Detail:
Created Date:  1990-03-22     Completed Date:  1990-03-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  2985128R     Medline TA:  J Exp Child Psychol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  101-25     Citation Subset:  IM    
Department of Psychology, Mills College, Oakland, CA 94613.
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MeSH Terms
Age Factors
Child Development*
Eye Movements*
Fixation, Ocular
Infant, Newborn / physiology*
Motion Perception / physiology
Photic Stimulation
Visual Perception / physiology*
Grant Support

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