Liu Taosheng, Stevens Sean T, Carrasco Marisa
Department of Psychology, New York University, 6 Washington Place, 8th floor, NY 10003, USA.
Vision Res. 2007 Jan;47(1):108-13. doi: 10.1016/j.visres.2006.09.017. Epub 2006 Nov 7.
We investigated the time course of feature-based attention and compared it to the time course of spatial attention in an experiment with identical stimuli and task. Observers detected a speed increment in a compound motion stimulus preceded by cues that indicated either the target location or direction. The cue-target stimulus-onset-asynchrony (SOA) was varied to assess the time course of the attentional effect. We found that spatial attention was deployed earlier than feature-based attention and that both types of attention improved performance to a similar extent at a longer SOA. Results indicate that attention is a flexible mechanism allowing us to efficiently select task-relevant information based on either spatial or feature dimensions, but that spatial attention exert its effects faster.
我们在一个使用相同刺激和任务的实验中，研究了基于特征的注意的时间进程，并将其与空间注意的时间进程进行了比较。观察者在复合运动刺激中检测速度增量，该刺激之前有提示，提示目标位置或方向。改变提示-目标刺激开始异步时间（SOA）以评估注意效应的时间进程。我们发现空间注意比基于特征的注意部署得更早，并且在更长的SOA时，两种类型的注意都在相似程度上提高了表现。结果表明，注意是一种灵活的机制，使我们能够根据空间或特征维度有效地选择与任务相关的信息，但空间注意发挥其作用的速度更快。
