空间选择性注意在上下视野间的转移

本实验研究空间选择性注意在上下视野间的转移及其是否受知觉空间的影响。实验采用Posner的位置线索化实验范式和两种深度线索背景,测量分辨任务的反应时(RTs)。实验发现:线索有效时的反应时比线索无效时的反应时短,而且线索对上视野刺激的反应时的影响较大。知觉空间中的深度线索对于注意在上下视野中转移没有显著影响。这些结果表明,空间选择性注意在上下视野转移存在不对称性,并且主要由物理空间决定。

ATTENTIONAL SHIFT BETWEEN THE UPPER AND LOWER VISUAL FIELDS

The current work examined the shift of spatial attention between the upper and lower visual fields and whether the attentional shift is influenced by perceived three-dimensional space. Posner's cueing paradigm and two sets of visual context were used that produced perceived depth. Reaction times were measured in valid, invalid, and neutral conditions. We found that reaction latency was shorter in the valid conditions than that in invalid ones and this effect was stronger when stimuli were presented in upper visual fields than that in the lower ones. However, attentional shift between the upper and lower visual fields was not affected by perceived depth. The results suggest an asymmetry of the attentional shift between the upper visual fields and lower ones.