Learning of auditory equivalence classes for vowels by rats
Learning of auditory equivalence classes for vowels by rats
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DOI：
10.1016/j.beproc.2006.08.005
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发表时间：
2006-11-01
影响因子：
1.3
通讯作者：
Villa, Alessandro E. P.
中科院分区：
文献类型：
--
作者：
Eriksson, Jan L.;Villa, Alessandro E. P.
4只雄性Long-Evans大鼠被训练使用GO/NOGO反应选择任务来区分合成元音。元音的特点是基频的增加与共振峰频率的上移相关。在初始阶段，我们训练受试者区分两个元音类别，每个类别使用两个样本。在随后的阶段中，测试了大鼠概括这两个类别之间的区分的能力。为了测试大鼠是否可以利用训练刺激的属性共变的事实，我们使用了非标准的刺激与基本频率和共振峰之间的反向关系。总体结果表明，大鼠能够将歧视推广到相同元音的新实例。我们目前的证据表明，科目的表现取决于基本和共振峰频率之间的关系，他们以前被暴露。简单的模拟结果与人工神经网络可以重现大部分的行为结果和支持的假设，即元音的等价类与经验驱动的过程的基础上的一般属性的外围听觉编码混合与基本的学习机制。这些结果表明，大鼠使用光谱和时间线索类似于人类，尽管在基本的听觉能力的差异。(c)2006 Elsevier B. V.保留所有权利。
Four male Long-Evans rats were trained to discriminate between synthetic vowel sounds using a GO/NOGO response choice task. The vowels were characterized by an increase in fundamental frequency correlated with an upward shift in formant frequencies. In an initial phase we trained the subjects to discriminate between two vowel categories using two exemplars from each category. In a subsequent phase the ability of the rats to generalize the discrimination between the two categories was tested. To test whether rats might exploit the fact that attributes of training stimuli covaried, we used non-standard stimuli with a reversed relation between fundamental frequency and formants. The overall results demonstrate that rats are able to generalize the discrimination to new instances of the same vowels. We present evidence that the performance of the subjects depended on the relation between fundamental and formant frequencies that they had previously been exposed to. Simple simulation results with artificial neural networks could reproduce most of the behavioral results and support the hypothesis that equivalence classes for vowels are associated with an experience-driven process based on general properties of peripheral auditory coding mixed with elementary learning mechanisms. These results suggest that rats use spectral and temporal cues similarly to humans despite differences in basic auditory capabilities. (c) 2006 Elsevier B.V. All rights reserved.