Krause Peter A, Kawamoto Alan H
Department of Psychology.
J Exp Psychol Hum Percept Perform. 2019 Mar;45(3):319-335. doi: 10.1037/xhp0000610. Epub 2019 Feb 7.
In the form preparation task, participants verbally produce words in small sets, which either overlap on an early phonological fragment or contrast on that fragment. A canonical account of word-form encoding assumes a sequential phonological encoding phase necessarily preceding subsequent retrieval of a discrete phonetic motor plan. This account assumes that acoustic onset and speech onset are equivalent, and that speech onset never precedes complete processing of the stimulus. In two form preparation experiments, we examined the influence of anticipatory processes on preacoustic lip articulation. We used motion-tracked digital video to measure continuous changes in vertical lip aperture. In sets with initial segment overlap, participants configured their lips to anticipate upcoming aerodynamic demands, before stimulus presentation. Anticipatory posturing arose even when initial segment was only 75% certain. These findings appear inconsistent with extant speech models that assume ballistic execution of a fully encoded, certainly known response. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
在词形准备任务中，参与者以小组形式口头说出单词，这些单词要么在早期语音片段上重叠，要么在该片段上形成对比。对词形编码的传统解释假定，在随后检索离散的语音运动计划之前，必然存在一个顺序语音编码阶段。这种解释假定声音起始和言语起始是等效的，并且言语起始从不先于刺激的完整处理。在两项词形准备实验中，我们研究了预期过程对声学前唇部发音的影响。我们使用运动跟踪数字视频来测量垂直唇部开口的连续变化。在初始片段重叠的组中，参与者在刺激呈现之前就调整嘴唇以预期即将到来的空气动力学需求。即使初始片段只有75%的确定性，也会出现预期姿势。这些发现似乎与现存的言语模型不一致，这些模型假定完全编码、确定已知的反应是弹道式执行的。（PsycINFO数据库记录（c）2019美国心理学会，保留所有权利）
