The perceptual magnet effect as an emergent property of neural map formation
The perceptual magnet effect as an emergent property of neural map formation
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DOI：
10.1121/1.416296
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发表时间：
1996-08-01
影响因子：
2.4
通讯作者：
Gjaja, MN
中科院分区：
文献类型：
--
作者：
Guenther, FH;Gjaja, MN
知觉磁铁效应是最早出现在婴儿言语发育中的语言特异性现象之一。这种效应的特点是音位范畴中心附近的知觉空间发生扭曲。先前的解释是在认知心理学的理论框架内阐述的。本文提出的模型建立在心理学和神经科学的研究基础上，旨在更完整地解释这种影响。该模型体现了两个主要的假设支持大量的实验和理论研究，从神经科学文献：（1）感觉经验指导语言特定的发展听觉神经地图，和（2）人口矢量可以预测心理现象的基础上地图细胞活动。这些假设在一个自组织神经网络模型中得以实现。模型中的磁铁效应来自于地图单元放电偏好分布中的语言特定的不均匀性。数值模拟验证，该模型捕捉到已知的一般特性的磁铁效应，并提供准确的适合特定的心理物理数据。(C)1996年美国声学学会。
The perceptual magnet effect is one of the earliest known language-specific phenomena arising in infant speech development. The effect is characterized by a warping of perceptual space near phonemic category centers. Previous explanations have been formulated within the theoretical framework of cognitive psychology. The model proposed in this paper builds on research from both psychology and neuroscience in working toward a more complete account of the effect. The model embodies two principal hypotheses supported by considerable experimental and theoretical research from the neuroscience literature: (1) sensory experience guides language-specific development of an auditory neural map, and (2) a population vector can predict psychological phenomena based on map cell activities. These hypotheses are realized in a self-organizing neural network model. The magnet effect arises in the model from language-specific nonuniformities in the distribution of map cell firing preferences. Numerical simulations verify that the model captures the known general characteristics of the magnet effect and provides accurate fits to specific psychophysical data. (C) 1996 Acoustical Society of America.