2015年12月
Pre-constancy Vision in Infants
CURRENT BIOLOGY
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- ,
- ,
- 巻
- 25
- 号
- 24
- 開始ページ
- 3209
- 終了ページ
- 3212
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.cub.2015.10.053
- 出版者・発行元
- CELL PRESS
Our visual system can easily estimate the constant color and material of external objects despite dynamic changes in the retinal image across viewpoints and illuminations in natural scenes. It is commonly believed that this high-level visual function, called "perceptual constancy,'' is acquired through postnatal learning [1], building upon low-level functions that have developed earlier, such as image discrimination. However, we demonstrate here that before developing perceptual constancy, 3- to 4-month-old infants have a striking ability to discriminate slight image changes due to illumination that are not salient for adults. These young infants lose this ability after 5 months of age and then develop an ability to perceive distal surface properties (glossy or matte) at 7-8 months of age. Moreover, we identify the transition period between these two functions at 5-6 months of age, wherein infants show difficulty in both image and surface discrimination. These findings support the notion that acquiring perceptual constancy leads to a loss of sensitivity to variant information, which is negligible for constant surface material perception. We suggest that the immature visual system may initially directly access local image features and then develops a complementary constant neural representation of the properties of an object.
- リンク情報
- ID情報
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- DOI : 10.1016/j.cub.2015.10.053
- ISSN : 0960-9822
- eISSN : 1879-0445
- PubMed ID : 26671667
- Web of Science ID : WOS:000367233400021