Document Detail

With or without a hole: young infants' sensitivity for topological versus geometric property.
MedLine Citation:
PMID:  22808584     Owner:  NLM     Status:  In-Process    
Evidence from adult psychophysics, brain imaging, and honeybee's behaviour has been reported to support the notion that topological properties are the primitives of visual representation (Chen, 1982 Science 218 699-700). Here, we ask how the sensitivity to topological property might originate during development. Specifically, we tested 1.5- to 6-month-old infants' visual sensitivity for topological versus geometric properties with the forced-choice novelty preference technique. A disk and a ring were used in the topologically different condition (experiment 1), while a disk and a triangle were used in the geometrically different condition (experiment 2). Spontaneous preferences for the disk, the ring, and the triangle were measured pairwise using the preferential looking-time technique (experiment 3). The results showed that infants could reliably discriminate stimuli based on topological differences, but failed to do so with geometric differences. Moreover, in the generalisation task, infants showed higher novelty preference for the topologically different figure (the ring). In addition, the results of both experiments cannot be attributed to a spontaneous preference for the ring or for the disk. Further analysis on individual infants' age and performance revealed two distinct developmental trends. Infants seem to be sensitive to topological differences as young as 1.5 months, while their ability to discriminate geometric differences was at chance before 3 months and gradually improved with age. Taken together, our findings suggested an early sensitivity for topological property, at least for the detection of stimuli with or without a hole.
Sarina Hui-Lin Chien; Yun-Lan Lin; Wenli Qian; Ke Zhou; Ming-Kuan Lin; Hsin-Yueh Hsu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  41     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2012  
Date Detail:
Created Date:  2012-07-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  305-18     Citation Subset:  IM    
Graduate Institute of Neural and Cognitive Sciences, China Medical University, No 91 Hsueh-Shih Road, Taichung, Taiwan 40402, Republic of China.
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