Document Detail

Connectivity perception of partly occluded gratings in 4-month-old infants.
MedLine Citation:
PMID:  11515958     Owner:  NLM     Status:  MEDLINE    
Four groups of eight 4-month-old infants were each habituated to one of four displays consisting of a grating of either low (0.4 cycle deg(-1) or high (1.2 cycles deg(-1) spatial frequency, whose central portion was covered up with a horizontal occluder which was either narrow (1.33 deg) or broad (4.17 deg). Posthabituation displays consisted of a complete grating of the same frequency as the habituated grating, along with a separate grating whose central portion was replaced with a black gap of the same height as the occluder in the habituation displays. All the infants, except those who were habituated to the high frequency with the broad occluder, looked longer at the separate grating than the complete grating display during posthabituation trials. Previously, we found that infants under 1 month of age perceive the grating continuation only when the occluder height is less than about 0.5 cycle of the grating; our present results show that this figure increases to about 1.6 cycles of the grating frequency in the case of 4-month-old infants. These findings indicate that those developmental changes depend on both the sufficiency of visual information available and the efficiency of the perceptual ability of infants for grasping spatial relationships.
H Kawabata; J Gyoba; H Inoue; H Ohtsubo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  30     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2001  
Date Detail:
Created Date:  2001-08-22     Completed Date:  2001-08-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  867-74     Citation Subset:  IM    
Department of Psychology, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan.
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MeSH Terms
Analysis of Variance
Form Perception / physiology*
Perceptual Closure / physiology*
Space Perception / physiology

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