Lagrois Marie-Élaine, Palmer Caroline, Peretz Isabelle
International Laboratory for Brain, Music, and Sound Research, Montreal, QC H3C 3J7, Canada.
Department of Psychology, University of Montreal, Montreal, QC H3C 3J7, Canada.
Brain Sci. 2019 Jul 4;9(7):157. doi: 10.3390/brainsci9070157.
The rhythmic nature of speech may recruit entrainment mechanisms in a manner similar to music. In the current study, we tested the hypothesis that individuals who display a severe deficit in synchronizing their taps to a musical beat (called beat-deaf here) would also experience difficulties entraining to speech. The beat-deaf participants and their matched controls were required to align taps with the perceived regularity in the rhythm of naturally spoken, regularly spoken, and sung sentences. The results showed that beat-deaf individuals synchronized their taps less accurately than the control group across conditions. In addition, participants from both groups exhibited more inter-tap variability to natural speech than to regularly spoken and sung sentences. The findings support the idea that acoustic periodicity is a major factor in domain-general entrainment to both music and speech. Therefore, a beat-finding deficit may affect periodic auditory rhythms in general, not just those for music.
言语的节奏特性可能会以类似于音乐的方式激活同步机制。在本研究中，我们检验了这样一个假设：那些在将敲击与音乐节拍同步方面表现出严重缺陷的个体（在这里称为节拍失聪）在与言语同步时也会遇到困难。要求节拍失聪的参与者及其匹配的对照组将敲击与自然语速、正常语速和歌唱句子的节奏中的感知规律对齐。结果表明，在所有条件下，节拍失聪的个体比对照组更难以准确地同步敲击。此外，两组参与者在与自然言语同步时比与正常语速和歌唱句子同步时表现出更大的敲击间变异性。这些发现支持了这样一种观点，即声学周期性是跨领域同步到音乐和言语的一个主要因素。因此，节拍寻找缺陷可能会影响一般的周期性听觉节奏，而不仅仅是音乐中的节奏。
