Silva Susana, Dias Carolina, Castro São Luís
Center for Psychology at University of Porto (CPUP), Faculty of Psychology and Education Sciences, 4200-135 Porto, Portugal.
Brain Sci. 2019 Jul 17;9(7):169. doi: 10.3390/brainsci9070169.
The acoustic cues that guide the assignment of phrase boundaries in music (pauses and pitch movements) overlap with those that are known for speech prosody. Based on this, researchers have focused on highlighting the similarities and neural resources shared between music and speech prosody segmentation. The possibility that music-specific expectations add to acoustic cues in driving the segmentation of music into phrases could weaken this bottom-up view, but it remains underexplored. We tested for domain-specific expectations in music segmentation by comparing the segmentation of the same set of ambiguous stimuli under two different instructions: stimuli were either presented as speech prosody or as music. We measured how segmentation differed, in each instruction group, from a common reference (natural speech); thus, focusing on how instruction affected delexicalization effects (natural speech vs. transformed versions with no phonetic content) on segmentation. We saw interactions between delexicalization and instruction on most segmentation indices, suggesting that there is a music mode, different from a speech prosody mode in segmentation. Our findings highlight the importance of top-down influences in segmentation, and they contribute to rethinking the analogy between music and speech prosody.
引导音乐中乐句边界划分的声学线索（停顿和音高变化）与语音韵律中已知的线索重叠。基于此，研究人员专注于突出音乐与语音韵律分割之间的相似性和共享的神经资源。音乐特有的预期在推动将音乐分割成乐句时增加声学线索的可能性可能会削弱这种自下而上的观点，但这一点仍未得到充分探索。我们通过比较同一组模糊刺激在两种不同指令下的分割情况来测试音乐分割中特定领域的预期：刺激要么呈现为语音韵律，要么呈现为音乐。我们测量了每个指令组中分割与一个共同参考（自然语音）的差异；因此，重点关注指令如何影响分割中的去词汇化效应（自然语音与没有语音内容的转换版本）。我们在大多数分割指标上看到了去词汇化和指令之间的相互作用，这表明在分割中存在一种与语音韵律模式不同的音乐模式。我们的研究结果突出了自上而下的影响在分割中的重要性，并有助于重新思考音乐与语音韵律之间的类比。
