Horváth János
Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Cognitive Neuroscience and Psychology, P.O.B. 286, 1519, Budapest, Hungary,
Cogn Affect Behav Neurosci. 2014 Dec;14(4):1392-406. doi: 10.3758/s13415-014-0283-x.
A number of studies have shown that sounds temporally close to one's own finger movements elicit lower-amplitude auditory event-related potentials (ERPs) than do the same tones when they are only listened to. In these studies, the actions have involved making a mechanical contact with an object. In the present study, the role of mechanical contact with an object was investigated in action-related auditory attenuation. In three experiments, participants performed a time-interval production task. In each experiment, in one condition the action involved touching an object, but no mechanical contact was made in the other. The estimated tone-related ERP contributions to the action-tone coincidence ERP waveforms (calculated by subtracting the action-related ERP from the coincidence ERP) were more attenuated when the action involved moving the finger and making a mechanical contact at the end of the movement. However, when participants kept their finger on a piezoelectric element and applied pressure impulses without moving their finger, the action did not result in stronger attenuation of the tone-related auditory ERP estimates. Although these results may suggest that auditory ERP attenuation is stronger for actions resulting in mechanical impact, they also imply that mechanical impact may confound and lead to the overestimation of auditory ERP attenuation in such paradigms, because the impact may result in faint but audible sounds.
多项研究表明，与仅聆听相同音调相比，在时间上与自身手指动作接近的声音所引发的听觉事件相关电位（ERP）振幅更低。在这些研究中，动作涉及与物体进行机械接触。在本研究中，研究了与物体的机械接触在动作相关听觉衰减中的作用。在三个实验中，参与者执行了一个时间间隔生成任务。在每个实验中，在一种条件下动作涉及触摸物体，但在另一种条件下没有进行机械接触。当动作涉及移动手指并在动作结束时进行机械接触时，估计的与音调相关的ERP对动作 - 音调重合ERP波形的贡献（通过从重合ERP中减去与动作相关的ERP来计算）衰减得更厉害。然而，当参与者将手指放在压电元件上并施加压力脉冲而不移动手指时，该动作并未导致与音调相关的听觉ERP估计值有更强的衰减。尽管这些结果可能表明，对于导致机械冲击的动作，听觉ERP衰减更强，但它们也意味着机械冲击可能会混淆并导致在此类范式中对听觉ERP衰减的高估，因为这种冲击可能会产生微弱但可听见的声音。
