Lange-Malecki Bettina, Treue Stefan
Cognitive Neuroscience Laboratory, German Primate Centre, Kellnerweg 4, Göttingen, Germany.
Vision Res. 2012 Jun 1;62:134-8. doi: 10.1016/j.visres.2012.03.016.
Visual motion perception is essential for appropriate behavior in a dynamic visual world. It is influenced by voluntary attention towards or away from moving objects as well as by the capture of automatic attention by salient stimuli. Both kinds of attention play a major role in the Eriksen Flanker Task (EFT),where a central stimulus has to be identified in the presence of flanking distractors. For static visual stimuli incongruent peripheral flankers are known to reduce accuracy rates and prolong reaction times. However,it is not known if a similar flanker effect also affects speeded responses to moving stimuli. We therefore examined whether a flanker effect exists for moving random dot patterns (RDPs) and compared it to the effect elicited by static visual triangles in human subjects. We observed a motion flanker effect,both for response times and accuracy rates. Incongruently moving peripheral flankers caused a slowing of response time and a reduction of accuracy rates compared to congruently moving RDPs. These motion flanker effects were not significantly different from those in the static flanker task. The presence of a motion flanker effect and its similarity to the flanker effect for static stimuli suggests that visual motion engages competitive attention and control mechanisms for perception and decision-making similar to those engaged by non-moving features.
视觉运动感知对于在动态视觉世界中做出恰当行为至关重要。它受到对移动物体的有意关注或不关注的影响，也受到显著刺激对自动注意力的吸引的影响。这两种注意力在埃里克森侧翼任务（EFT）中都起着重要作用，在该任务中，必须在侧翼干扰物存在的情况下识别中央刺激。对于静态视觉刺激，已知不一致的外周侧翼会降低准确率并延长反应时间。然而，尚不清楚类似的侧翼效应是否也会影响对移动刺激的快速反应。因此，我们研究了移动随机点图案（RDP）是否存在侧翼效应，并将其与人类受试者中静态视觉三角形引发的效应进行了比较。我们观察到了运动侧翼效应，无论是反应时间还是准确率方面。与同向移动的RDP相比，异向移动的外周侧翼导致反应时间变慢和准确率降低。这些运动侧翼效应与静态侧翼任务中的效应没有显著差异。运动侧翼效应的存在及其与静态刺激侧翼效应的相似性表明，视觉运动在感知和决策中涉及与非移动特征所涉及的类似的竞争性注意力和控制机制。
