School of Kinesiology, University of British Columbia, Canada.
Brain Cogn. 2012 Feb;78(1):1-6. doi: 10.1016/j.bandc.2011.10.010. Epub 2011 Nov 17.
We investigated the processes underlying stimulus-response compatibility by using a lateralized auditory stimulus in a simple and choice reaction time (RT) paradigm. Participants were asked to make either a left or right key lift in response to either a control (80dB) or startling (124dB) stimulus presented to either the left ear, right ear, or both ears. In the simple RT paradigm, we did not find a compatibility effect for either control or startle trials but did find a right-ear advantage which we attribute to anatomical asymmetry of auditory pathways. In the choice RT paradigm, we found compatibility effects for both startle and control trials as well a high incidence of error for contralateral stimulus-response mapping. We attribute these results to automatic activation of the ipsilateral response, which must then be inhibited prior to initiation of the correct response. The presence of compatibility effects for startle trials also suggest that similar pathways are being used to initiate movements in a choice RT situation, as opposed to involuntary triggering that is thought to occur in a simple RT situation.
我们通过在简单和选择反应时（RT）范式中使用偏向性听觉刺激，研究了刺激-反应兼容性的过程。参与者被要求根据控制（80dB）或惊跳（124dB）刺激，对左耳、右耳或双耳做出左或右的按键反应。在简单 RT 范式中，我们没有发现控制或惊跳试验的兼容性效应，但确实发现了右耳优势，我们将其归因于听觉通路的解剖学不对称。在选择 RT 范式中，我们发现惊跳和控制试验都存在兼容性效应，以及对侧刺激-反应映射的高错误发生率。我们将这些结果归因于对侧反应的自动激活，然后必须在启动正确反应之前抑制对侧反应。惊跳试验的兼容性效应也表明，在选择 RT 情况下，类似的通路被用来启动运动，而不是被认为在简单 RT 情况下发生的无意识触发。
