Ortega Laura, Guzman-Martinez Emmanuel, Grabowecky Marcia, Suzuki Satoru
Department of Psychology, Northwestern University, 2029 Sheridan Rd., Evanston, IL, 60208, USA,
Atten Percept Psychophys. 2014 Jul;76(5):1485-502. doi: 10.3758/s13414-014-0663-x.
Whereas the visual modality tends to dominate over the auditory modality in bimodal spatial perception, the auditory modality tends to dominate over the visual modality in bimodal temporal perception. Recent results suggest that the visual modality dominates bimodal spatial perception because spatial discriminability is typically greater for the visual than for the auditory modality; accordingly, visual dominance is eliminated or reversed when visual-spatial discriminability is reduced by degrading visual stimuli to be equivalent or inferior to auditory spatial discriminability. Thus, for spatial perception, the modality that provides greater discriminability dominates. Here, we ask whether auditory dominance in duration perception is similarly explained by factors that influence the relative quality of auditory and visual signals. In contrast to the spatial results, the auditory modality dominated over the visual modality in bimodal duration perception even when the auditory signal was clearly weaker, when the auditory signal was ignored (i.e., the visual signal was selectively attended), and when the temporal discriminability was equivalent for the auditory and visual signals. Thus, unlike spatial perception, where the modality carrying more discriminable signals dominates, duration perception seems to be mandatorily linked to auditory processing under most circumstances.
在双模式空间感知中，视觉模态往往比听觉模态占主导地位；而在双模式时间感知中，听觉模态往往比视觉模态占主导地位。最近的研究结果表明，视觉模态在双模式空间感知中占主导地位是因为视觉的空间辨别能力通常比听觉更强；因此，当通过将视觉刺激降级到与听觉空间辨别能力相当或更低的水平来降低视觉空间辨别能力时，视觉主导地位就会消除或逆转。所以，对于空间感知而言，提供更高辨别能力的模态占主导地位。在此，我们要探讨在时长感知中听觉占主导地位是否同样可以由影响听觉和视觉信号相对质量的因素来解释。与空间感知的结果不同，在双模式时长感知中，即使听觉信号明显较弱、听觉信号被忽略（即选择性地关注视觉信号）以及听觉和视觉信号的时间辨别能力相当时，听觉模态仍比视觉模态占主导地位。因此，与携带更多可辨别信号的模态占主导地位的空间感知不同，在大多数情况下，时长感知似乎必然与听觉处理相关联。
