An Experimental Evaluation of the Influence of Auditory Cues on Perceived Visual Orders in Depth
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We present an experiment investigating the influence of auditory cues on visual perceived orders in depth. Visual stimuli consisted in a layered 2D drawing of two squares respectively blue and red using semi-transparency. Auditory signals of the two words ``red'' and ``blue'' were presented simultaneously to the images. Subjects were required to determine which square appeared in front of the other in these cross-modal conditions. The coefficient of transparency as well as the audio level difference between the two speech signals ``red'' and ``blue'' were systematically varied. No significant influence of auditory cues on perceived order in depth was found, except when the visual information was totally ambiguous: in this case, the perceived order showed limited dependence on the acoustic information.