跨通道的内源性选择注意

CROSS-MODAL ENDOGENOUS VISUAL SELECTIVE ATTENTION

该实验利用空间线索技术研究跨视觉和听觉通道的内源性选择性注意。实验结果表明视觉中央线索能可靠地引寻出内源性视觉选择性注意；听觉中央线索在较长的SOA（至少500ms）条件下也能引导出内源性视觉选择性注意。支持视觉和听觉具有特异性的注意加工通道，但两者之间存在相互连接的假设。

The present study investigated cross-modal links for endogenous covert spatial orienting in vision and hearing. By comparing the visual symbolic cues (an arrow at the fixation point indicating a probable peripheral target) with auditory symbolic cues (one of three pure sounds with different pitches), examined the possibility of auditory symbolic cues to activate endogenous visual selective attention, and showed that valid auditory cues come with inhibition rather than facilitation at SOA shorter than 500ms while valid visual cues showed significant facilitation even at the shortest SOA(100ms).At longer SOA, both cues showed facilitation. These results showed that there were indeed separable modality-specific spatial-attention systems, but with links such that auditory orienting tended to result in visual orienting to the corresponding location in visual space, suggesting the 'separable but linked' hypothesis.