Brain Activity Related to Sound Symbolism: Cross-modal Effect of an Aurally Presented Phoneme on Judgment of Size
Brain Activity Related to Sound Symbolism: Cross-modal Effect of an Aurally Presented Phoneme on Judgment of Size
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DOI：
10.1038/s41598-019-43457-3
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发表时间：
2019-05-07
影响因子：
4.6
通讯作者：
Kobayasi, Kohta, I
中科院分区：
文献类型：
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作者：
Itagaki, Sachi;Murai, Shota;Kobayasi, Kohta, I
声音象征是一种声音产生某种印象的想法（例如，音素“p”与小的印象相关联），并且可能是词义联想的心理基础。在这项研究中，我们探讨了声音象征的神经基础。受试者被要求比较标准和目标刺激的视觉大小，同时听音节假设创建一个更大或更小的印象。刺激-反应一致性是指目标大小与音节印象之间的一致性。行为数据显示，被试在不一致条件下的反应时比一致条件下的反应时长，表明他们倾向于将物体的大小与某些音节联系起来。我们使用功能性磁共振成像来评估任务过程中的大脑活动，发现大脑中与语义和语音过程相关的区域（分别为左侧颞中回和右侧上级颞回）在不一致条件下被激活。这些结果表明，这些区域与声音象征的不一致性。
Sound symbolism is the idea that a sound makes a certain impression (e.g., phoneme "p" is associated with an impression of smallness) and could be the psychological basis of the word-meaning association. In this study, we investigated the neural basis of sound symbolism. Subjects were required to compare the visual sizes of standard and target stimuli while listening to syllables assumed to create either a larger or smaller impression. Stimulus-response congruence is defined as the agreement between the target size and the syllable's impression. Behavioral data showed that the subjects displayed a longer reaction time under the incongruent condition than under the congruent condition, indicating that they tended to associate the object size with certain syllables. We used functional magnetic resonance imaging to evaluate the cerebral activity during the task, and found that both semantic-and phonetic-process-related areas of the brain (left middle temporal gyrus and right superior temporal gyrus, respectively) were activated under the incongruent condition. These results suggest that these regions are associated with the incongruence of sound symbolism.