Instituto Universitario de Neurociencia, Universidad de La Laguna, La Laguna, Spain.
Laboratorio de Linguaxe e Cognición, Universidade de Vigo, Vigo, Spain.
PLoS One. 2023 Aug 10;18(8):e0289926. doi: 10.1371/journal.pone.0289926. eCollection 2023.
The planning and execution of manual actions can be influenced by concomitant processing of manual action verbs. However, this phenomenon manifests in varied ways throughout the literature, ranging from facilitation to interference effects. Suggestively, stimuli across studies vary randomly in two potentially relevant variables: verb motility and effector quantity (i.e., the amount of movement and the number of hands implied by the word, respectively). Here we examine the role of these factors during keyboard typing, a strategic bimanual task validated in previous works. Forty-one participants read and typed high and low motility items from four categories: bimanual, unimanual, and non-manual action verbs, as well as minimally motoric verbs. Motor planning and execution were captured by first-letter lag (the lapse between word presentation and first keystroke) and whole-word lag (the lapse between the first and last keystroke). We found that verb motility modulated action planning and execution, both stages being delayed by high (relative to low) motility verbs. Effector quantity also influenced both stages, which were facilitated by bimanual verbs relative to unimanual verbs and non-manual verbs (this effect being confined to high motility items during action execution). Accordingly, motor-language coupling effects seem sensitive to words' implied motility and number of evoked limbs. These findings refine our understanding of how semantics influences bodily movement.
手动动作的规划和执行会受到手动动作动词的伴随处理的影响。然而，这种现象在文献中表现方式各不相同，从促进作用到干扰作用都有。暗示性地，研究中的刺激在两个潜在相关的变量中随机变化：动词活动性和效应器数量（即，单词所暗示的运动量和手的数量）。在这里，我们在键盘打字过程中检查这些因素的作用，这是之前的工作中验证过的一种策略性双手任务。41 名参与者阅读并键入了高和低活动性的项目，这些项目来自四个类别：双手、单手和非手动动作动词，以及最小运动性动词。运动规划和执行通过首字母延迟（从单词呈现到第一次按键之间的时间差）和整个单词延迟（从第一个到最后一个按键之间的时间差）来捕获。我们发现，动词活动性调节了动作的规划和执行，这两个阶段都因高（相对于低）活动性动词而延迟。效应器数量也影响了这两个阶段，与单手动词和非手动动词相比，双手动词使这两个阶段更加顺畅（在动作执行过程中，这种效果仅限于高活动性项目）。因此，运动-语言耦合效应似乎对单词所暗示的活动性和诱发的肢体数量敏感。这些发现完善了我们对语义如何影响身体运动的理解。
