Santangelo Valerio, Spence Charles
Department of Experimental Psychology, University of Oxford, UK.
J Exp Psychol Hum Percept Perform. 2007 Dec;33(6):1311-21. doi: 10.1037/0096-1523.33.6.1311.
We compared the ability of auditory, visual, and audiovisual (bimodal) exogenous cues to capture visuo-spatial attention under conditions of no load versus high perceptual load. Participants had to discriminate the elevation (up vs. down) of visual targets preceded by either unimodal or bimodal cues under conditions of high perceptual load (in which they had to monitor a rapidly presented central stream of visual letters for occasionally presented target digits) or no perceptual load (in which the central stream was replaced by a fixation point). The results of 3 experiments showed that all 3 cues captured visuo-spatial attention in the no-load condition. By contrast, only the bimodal cues captured visuo-spatial attention in the high-load condition, indicating for the first time that multisensory integration can play a key role in disengaging spatial attention from a concurrent perceptually demanding stimulus.
我们比较了在无负荷与高感知负荷条件下，听觉、视觉和视听（双峰）外源性线索捕捉视觉空间注意力的能力。参与者必须在高感知负荷条件下（他们必须监测快速呈现的中央视觉字母流，以寻找偶尔出现的目标数字）或无感知负荷条件下（中央流被一个固定点取代），区分由单峰或双峰线索引导的视觉目标的高度（向上与向下）。3个实验的结果表明，在无负荷条件下，所有3种线索都能捕捉视觉空间注意力。相比之下，在高负荷条件下，只有双峰线索能捕捉视觉空间注意力，这首次表明多感官整合在将空间注意力从同时存在的感知要求较高的刺激中分离出来方面可以发挥关键作用。
