Precise force controls enhance loudness discrimination of self-generated sound
Precise force controls enhance loudness discrimination of self-generated sound
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DOI：
10.1007/s00221-020-05993-7
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发表时间：
2021-02-08
影响因子：
2
通讯作者：
Nakazawa, Kimitaka
中科院分区：
文献类型：
--
作者：
Endo, Nozomi;Ito, Takayuki;Nakazawa, Kimitaka
运动执行改变了感觉过程。研究表明，当声音是由活跃的运动产生时，响度感知会发生变化。然而，与运动有关的响度知觉的变化在哪里以及如何依赖于运动执行的任务需求还是个未知数。我们考察了运动控制中不同程度的精确度要求是否会影响响度感知。我们进行了响度辨别测试，在该测试中，声音刺激是与力量产生任务一起产生的。我们测试了三个目标力幅度水平。力目标作为固定的视觉目标显示在监视器上。所产生的力也作为视觉光标的移动呈现在同一监视器上。参与者使用这些视觉目标和移动的光标，在预定的范围内调整他们的力幅，而不会过度射击。在控制条件下，声音和视觉刺激是从外部产生的(不需要力量产生任务)。我们发现，与外部发出声音的控制条件相比，由力产生任务发出声音时的辨别性能显著提高，尽管我们没有发现这种改善取决于不同的目标力幅度水平。结果表明，精确控制产生固定力量的需求可能是在听觉过程中获得运动执行的易化效果的关键。
Motor executions alter sensory processes. Studies have shown that loudness perception changes when a sound is generated by active movement. However, it is still unknown where and how the motor-related changes in loudness perception depend on the task demand of motor execution. We examined whether different levels of precision demands in motor control affects loudness perception. We carried out a loudness discrimination test, in which the sound stimulus was produced in conjunction with the force generation task. We tested three target force amplitude levels. The force target was presented on a monitor as a fixed visual target. The generated force was also presented on the same monitor as a movement of the visual cursor. Participants adjusted their force amplitude in a predetermined range without overshooting using these visual targets and moving cursor. In the control condition, the sound and visual stimuli were generated externally (without a force generation task). We found that the discrimination performance was significantly improved when the sound was produced by the force generation task compared to the control condition, in which the sound was produced externally, although we did not find that this improvement in discrimination performance changed depending on the different target force amplitude levels. The results suggest that the demand for precise control to produce a fixed amount of force may be key to obtaining the facilitatory effect of motor execution in auditory processes.