Bertels Julie, San Anton Estibaliz, Gebuis Titia, Destrebecqz Arnaud
Center for Research in Cognition and Neurosciences (CRCN) and ULB Neuroscience Institute (UNI), Université Libre de Bruxelles, Belgium.
Fonds de la Recherche Scientifique - FNRS, Brussels, Belgium.
Dev Sci. 2017 Jul;20(4). doi: 10.1111/desc.12397. Epub 2016 Feb 26.
Extracting the statistical regularities present in the environment is a central learning mechanism in infancy. For instance, infants are able to learn the associations between simultaneously or successively presented visual objects (Fiser & Aslin, ; Kirkham, Slemmer & Johnson, ). The present study extends these results by investigating whether infants can learn the association between a target location and the context in which it is presented. With this aim, we used a visual associative learning procedure inspired by the contextual cuing paradigm, with infants from 8 to 12 months of age. In two experiments, in which we varied the complexity of the stimuli, we first habituated infants to several scenes where the location of a target (a cartoon character) was consistently associated with a context, namely a specific configuration of geometrical shapes. Second, we examined whether infants learned the covariation between the target location and the context by measuring looking times at scenes that either respected or violated the association. In both experiments, results showed that infants learned the target-context associations, as they looked longer at the familiar scenes than at the novel ones. In particular, infants selected clusters of co-occurring contextual shapes and learned the covariation between the target location and this subset. These results support the existence of a powerful and versatile statistical learning mechanism that may influence the orientation of infants' visual attention toward areas of interest in their environment during early developmental stages. A video abstract of this article can be viewed at: https://www.youtube.com/watch?v=9Hm1unyLBn0.
提取环境中存在的统计规律是婴儿期一种核心的学习机制。例如,婴儿能够学习同时或相继呈现的视觉对象之间的关联(菲舍尔和阿斯林;柯克姆、斯莱默和约翰逊)。本研究通过调查婴儿是否能够学习目标位置与其呈现背景之间的关联来扩展这些结果。为此,我们采用了一种受上下文线索范式启发的视觉联想学习程序,研究对象为8至12个月大的婴儿。在两个实验中,我们改变了刺激的复杂性,首先让婴儿对几个场景形成习惯化,在这些场景中,目标(一个卡通人物)的位置始终与一个背景相关联,即一种特定的几何形状配置。其次,我们通过测量婴儿对符合或违反这种关联的场景的注视时间,来检验婴儿是否学习了目标位置与背景之间的协变关系。在两个实验中,结果都表明婴儿学习到了目标 - 背景关联,因为他们对熟悉场景的注视时间比对新场景的更长。特别是,婴儿选择了同时出现的背景形状集群,并学习了目标位置与这个子集之间的协变关系。这些结果支持了一种强大且通用的统计学习机制的存在,这种机制可能在早期发育阶段影响婴儿的视觉注意力朝向其环境中感兴趣区域的方向。本文的视频摘要可在以下网址观看:https://www.youtube.com/watch?v=9Hm1unyLBn0。