We tested the effect of co-presence on entrainment to speech rhythm, examining differences in speech rhythm convergence during a reading task, in conditions where the reading partner was present or absent. Speech rhythm was operationalized as a two-level phenomenon. At a lower level, rhythm was operationalized as regularity in the distribution of salient acoustic events (vowel onsets) and regularity in the duration of speech intervals (consonantal and vocalic intervals). At a higher level, rhythm was operationalized in terms of meter, the distribution of salience that can group syllables into metrical structures, based on lexical stress and phrasal prominence. To assess the impact of the presence/absence of a co-speaker on speech entrainment, we asked a model speaker and experimental participants to sit side-by-side and read two texts aloud at the same time while recording each speaker separately. Later, we requested only experimental participants to read in synchrony with the recording obtained from the recurrent model speaker during side-by-side reading and, afterwards, we asked experimental participants to read in synchrony with a solo recording from the same recurrent model speaker. We used a poetic text with strong meter and a narrative text with weak meter as reading materials. To assess the degree of speech rhythm convergence, we measured the degree of durational variability in vocalic and consonantal intervals across conditions and texts and the deviation in vowel onsets between chorusing readers. We found that participants make their speech more regular to facilitate chorusing. Importantly, inter-speaker synchronization was substantially improved during side-by-side reading compared to the condition where the speaker read in synchrony with a recording obtained during side-by-side synchronous reading, even though the acoustic signal received by the experimental participants was the same in both conditions. We also found that the text with strong meter modulated the success of speech rhythm convergence only in the most challenging condition, requiring reading in synchrony with a recording of the model speaker reading solo. These results show that co-presence plays a crucial role in inter-speaker entrainment, while meter can provide additional benefits for chorusing in more challenging conditions.

我们测试了共存对言语节奏的train带的影响，检查了在阅读任务存在或不存在的情况下阅读任务期间言语节奏收敛的差异。语音节奏被作为两个层次的现象进行操作。在较低的水平上，节奏的操作是突出的声波事件的分布规律（元音发作）和语音间隔的持续时间（辅音和发声间隔）的规律性。在较高的水平上，节奏以米为单位进行操作，即基于词汇重音和短语突出程度的显着性分布，可以将音节分组为度量结构。为了评估是否存在共同讲话者对语音夹带的影响，我们询问了模型演讲者和实验参与者并排坐着，并同时大声朗读两个文本，同时分别录制每个扬声器。后来，我们只要求实验参与者在并排朗读期间与从复发性模型说话者获得的录音同步阅读，然后，我们要求实验参与者与同一个复发性模型说话者的独奏录音同步阅读。我们使用具有强音调的诗歌文本和具有弱音调的叙述文本作为阅读材料。为了评估语音节奏收敛的程度，我们测量了跨条件和文本的语音和辅音间隔的持续变化程度以及合唱读者之间元音发作的偏差。我们发现，参加者使他们的演讲更加有规律，以利于合唱。重要的是，与扬声器并排读取期间与并排同步读取期间获得的记录同步读取的情况相比，即使在实验参与者接收到的声音信号比较大的情况下，并排读取期间扬声器之间的同步也得到了显着改善。在两种情况下都是相同的。模特演讲者独唱。这些结果表明，共存在说话者之间的夹带中起着至关重要的作用，而电表则可以在更具挑战性的条件下为合唱提供额外的好处。