Schmidt Thomas, Seydell Anna
University of Giessen, Department of General and Experimental Psychology, Giessen, Germany.
Percept Psychophys. 2008 Apr;70(3):443-55. doi: 10.3758/pp.70.3.443.
We studied the influence of spatial visual attention on the time course of primed pointing movements. We measured pointing responses to color targets preceded by color stimuli priming either the same response as the target or the opposite response. The effects of visual attention at the prime and target locations were studied by varying both the cue-prime and prime-target intervals when presenting either exogenous attentional cues or, in a separate experiment, endogenous cues whose processing was a precondition for performing the task. Pointing trajectories revealed large priming effects in which pointing responses were first controlled by prime signals and then captured in midflight by target signals. Priming effects were strongly amplified when the relevant prime locations were visually attended at optimal cue-prime SOAs, with attention modulating the entire time course of the primed pointing movements. We propose that visual attention amplifies the earliest waves of visuomotor feedforward information, elicited in turn by primes and by targets.
我们研究了空间视觉注意对启动指向运动时间进程的影响。我们测量了对颜色目标的指向反应，在目标之前呈现颜色刺激，这些刺激启动与目标相同的反应或相反的反应。通过改变提示-启动间隔和启动-目标间隔，研究了启动和目标位置的视觉注意效应，在呈现外源性注意提示时，或者在一个单独的实验中，呈现内源性提示，其处理是执行任务的前提条件。指向轨迹显示出较大的启动效应，其中指向反应首先由启动信号控制，然后在飞行过程中被目标信号捕获。当在最佳提示-启动刺激呈现间隔（SOA）下视觉关注相关启动位置时，启动效应会被强烈放大，注意调节了启动指向运动的整个时间进程。我们提出，视觉注意放大了最早的视觉运动前馈信息波，这些信息波依次由启动刺激和目标刺激引发。
