Document Detail


Individual and developmental differences in disengagement of fixation in early infancy.
MedLine Citation:
PMID:  10368908     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The current study investigated whether individual and developmental differences in look duration are correlated with the latency for infants to disengage fixation from a visual stimulus. Ninety-four infants (52 3-month-olds, 42 4-month-olds) were tested in a procedure that measured ocular reaction time to shift fixation from a central target to a peripheral target under conditions in which the central-target either remained present ("competition" condition) or was removed from the display ("noncompetition" condition). Look duration was correlated with disengagement latency; longer-looking infants were slower than shorter-looking infants to shift fixation to the peripheral target on competition trials, but not noncompetition trials. Results were similar for 3- and 4-month-olds, although 3-month-olds showed slower latencies on all trials. Furthermore, long-looking infants were not consistently slower, but rather showed greater variability in their response latencies under conditions that required disengagement of fixation. The results support the position that developmental and individual differences in look duration are linked to the development of the neural attentional systems that control the ability to disengage, or inhibit, visual fixation.
Authors:
J E Frick; J Colombo; T F Saxon
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Child development     Volume:  70     ISSN:  0009-3920     ISO Abbreviation:  Child Dev     Publication Date:    1999 May-Jun
Date Detail:
Created Date:  1999-07-15     Completed Date:  1999-07-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0372725     Medline TA:  Child Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  537-48     Citation Subset:  IM    
Affiliation:
Department of Psychology, University of Georgia, Athens 30602-3013, USA. jfrick@egon.psy.uga.edu
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Attention / physiology*
Child Development*
Cross-Sectional Studies
Fixation, Ocular / physiology*
Humans
Individuality
Infant
Infant Behavior
Inhibition (Psychology)*
Reaction Time / physiology*
Grant Support
ID/Acronym/Agency:
HD29960/HD/NICHD NIH HHS

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


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