von Grünau M W, Bertone A, Pakneshan P
Department of Psychology, Concordia University, Montreal, Quebec, Canada.
Spat Vis. 1998;11(4):329-47. doi: 10.1163/156856898x00068.
In the present experiments the ability of attention to modulate the perceptual dominance in ambiguous motion displays was assessed, as well as the resulting changes of the motion aftereffect (MAE). As ambiguous motion stimuli we used plaids consisting of two differently moving components, where directed attention can select one or the other of the two components. We monitored this selection process during adaptation, and then measured the resulting MAE with static and/or dynamic test stimuli. The results demonstrate that attention increased the dominance of the selected component substantially. This led to an increase in the size of the MAE to the attended component, while the MAE to the not attended component decreased. It was further shown that the attentional MAE effect was relatively short-lasting, only for about the first third of the total MAE. It is concluded that attention can access levels of motion processing that are prior to or at the level of the generation of the component MAEs.
在当前实验中，我们评估了注意力调节模糊运动显示中感知优势的能力，以及由此产生的运动后效（MAE）变化。作为模糊运动刺激，我们使用了由两个不同运动成分组成的格子图案，定向注意力可以选择这两个成分中的一个或另一个。我们在适应过程中监测了这个选择过程，然后用静态和/或动态测试刺激测量由此产生的MAE。结果表明，注意力显著增加了所选成分的优势。这导致了对被关注成分的MAE大小增加，而对未被关注成分的MAE减小。进一步表明，注意力对MAE的影响相对短暂，仅在总MAE的大约前三分之一时间内存在。得出的结论是，注意力可以进入运动处理的水平，这些水平在成分MAE产生之前或与之处于同一水平。
