Document Detail

Human newborn color vision: measurement with chromatic stimuli varying in excitation purity.
MedLine Citation:
PMID:  9473313     Owner:  NLM     Status:  MEDLINE    
Groups of newborn human infants (N = 180) were habituated to large 16 degrees achromatic ("white") lights of varying luminance (0.35 to 1.16 log cd/m2) and then tested for recovery of habituation to 16 degrees green (dominant lambda = 545 nm), yellow (dominant lambda = 585 nm) or red (dominant lambda = 650 nm) lights which varied in the level of excitation purity (range = 32 to 83%). Results showed that newborns discriminated the chromatic stimuli from white only when excitation purity values exceeded at least 41% for 545-nm green, 47% for 650-nm red, and 65% for 585-nm yellow, limits much higher than those for adults (<1%). Taken together with the results from previous experiments, these saturation discrimination data (with the exception of the yellow data), provide some support for an expanded MacAdam ellipse model of early color discrimination (Brown, 1993; Teller & Lindsey, 1993). This helps reinforce the current view that neonates' vision is based on general rather than selective immaturities or inefficiencies within the requisite optical, photoreceptoral and neural mechanisms.
R J Adams; M L Courage
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of experimental child psychology     Volume:  68     ISSN:  0022-0965     ISO Abbreviation:  J Exp Child Psychol     Publication Date:  1998 Jan 
Date Detail:
Created Date:  1998-05-04     Completed Date:  1998-05-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985128R     Medline TA:  J Exp Child Psychol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  22-34     Citation Subset:  IM    
Copyright Information:
Copyright 1998 Academic Press.
Memorial University of Newfoundland, St. John's, Newfoundland, A1B 3X9, Canada.
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MeSH Terms
Analysis of Variance
Color Perception / physiology*
Discrimination (Psychology) / physiology*
Fixation, Ocular
Habituation, Psychophysiologic / physiology
Infant, Newborn
Longitudinal Studies

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