Trojan Jörg, Getzmann Stephan, Möller Johanna, Kleinböhl Dieter, Hölzl Rupert
Otto Selz Institute for Applied Psychology - Mannheim Centre for Work and Health, University of Mannheim, 68131 Mannheim, Germany.
Neurosci Lett. 2009 Aug 28;460(2):156-60. doi: 10.1016/j.neulet.2009.05.053. Epub 2009 May 27.
The perceptual phenomena of sensory saltation involve the systematic displacement of a target stimulus (the attractee) towards a subsequent stimulus (the attractant), which occurs closely in time and space. Here, we demonstrate the existence of cross-modal tactile-auditory saltation. Tactile stimuli were delivered to the forehead and spatially congruent stereoscopic auditory stimuli were presented via headphones to a total of 20 participants. After a reference stimulus at one of five spatial positions, the attractee was presented at a fixed position, followed by the attractant at a different fixed position with a delay of 81, 121, or 181 ms. Participants rated whether the attractee was perceived left or right of the reference in 2 uni-modal and 2 cross-modal (different reference/attractee vs. attractant mode) configurations. Saltation was present in all uni- and cross-modal configurations at an attractee-attractant delay of 81 ms. At delays of 81 ms the overall displacements were stronger than at delays of 121 ms, and tactile attractants generally induced stronger displacements than auditory attractants. The results indicated the existence of cross-modal tactile-auditory saltation, suggesting the application of the saltation phenomenon as a powerful approach for examining multi-modal sensory representations in future studies.
感觉跳跃的感知现象涉及目标刺激（被吸引物）向随后刺激（吸引物）的系统性位移，这种位移在时间和空间上紧密发生。在此，我们证明了跨模态触觉 - 听觉跳跃的存在。向20名参与者的额头施加触觉刺激，并通过耳机呈现空间上一致的立体听觉刺激。在五个空间位置之一的参考刺激之后，被吸引物在一个固定位置呈现，随后吸引物在不同的固定位置呈现，延迟时间为81、121或181毫秒。参与者在2种单模态和2种跨模态（不同参考/被吸引物与吸引物模式）配置下，对被吸引物相对于参考刺激是被感知在左侧还是右侧进行评分。在被吸引物 - 吸引物延迟81毫秒时，所有单模态和跨模态配置中均存在跳跃现象。在81毫秒的延迟时，总体位移比121毫秒延迟时更强，并且触觉吸引物通常比听觉吸引物引起更强的位移。结果表明存在跨模态触觉 - 听觉跳跃，这表明在未来研究中，跳跃现象可作为一种强大的方法用于研究多模态感觉表征。
