Tiede Mark, Mooshammer Christine, Goldstein Louis
Haskins Laboratories, New Haven, CT, United States.
Institut für Deutsche Sprache und Linguistik, Humboldt-Universität zu Berlin, Berlin, Germany.
Front Psychol. 2019 Nov 27;10:2459. doi: 10.3389/fpsyg.2019.02459. eCollection 2019.
Movements of the head and speech articulators have been observed in tandem during an alternating word pair production task driven by an accelerating rate metronome. Word pairs contrasted either onset or coda dissimilarity with same word controls. Results show that as production effort increased, so did speaker head nodding, and that nodding increased abruptly following errors. More errors occurred under faster production rates, and in coda rather than onset alternations. The greatest entrainment between head and articulators was observed at the fastest rate under coda alternation. Neither jaw coupling nor imposed prosodic stress was observed to be a primary driver of head movement. In alternating pairs, nodding frequency tracked the slower alternation rate rather than the syllable rate, interpreted as recruitment of additional degrees of freedom to stabilize the alternation pattern under increasing production rate pressure.
在由加速节拍器驱动的交替单词对生成任务中，人们观察到头部运动和言语发音器官的运动是同步进行的。单词对在词首或词尾的差异与相同单词的对照组形成对比。结果表明，随着发音努力的增加，说话者头部点头的次数也会增加，并且在出错后点头次数会突然增加。在更快的发音速度下以及在词尾而非词首交替中会出现更多错误。在词尾交替的最快速度下，观察到头部与发音器官之间的最大同步性。未观察到下颌耦合或施加的韵律重音是头部运动的主要驱动因素。在交替对中，点头频率跟踪较慢的交替速率而非音节速率，这被解释为在不断增加的发音速率压力下，为稳定交替模式而招募了额外的自由度。
