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Katherine Tregillus, Alissa Winkler, Fang Jiang; Cross-modal motion aftereffects induced by complex auditory stimuli. Journal of Vision 2016;16(12):863. doi: https://doi.org/10.1167/16.12.863.
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It has been demonstrated that motion aftereffects can transfer across perceptual modalities. For example, the motion aftereffect induced by a visual stimulus can affect the perceived motion direction of an auditory stimulus. Although cross-modal adaptation has been demonstrated from the visual to the auditory domain, aftereffects have not been consistently reported from the auditory to the visual domain. Previous research has often used simple auditory motion stimuli that contained a single motion cue. The current study utilized a more complex, naturalistic auditory motion stimulus. It contained multiple motion cues including inter-aural time differences, inter-aural level differences, and Doppler shifts that simulated an auditory stimulus traveling along the fronto-parallel plane. Participants were asked to judge the direction of random dot kinematograms (RDK) after adapting to auditory motion. The coherence levels of the visual motion stimuli (RDKs) were individually predetermined using a staircase procedure. We fit each participant's data with normal cumulative distribution functions and estimated the points of subjective equality (PSE). The PSEs were compared between the rightward and leftward adaptation conditions. We observed a consistent trend indicating cross-modal aftereffects on visual motion following adaptation to auditory motion. Our results suggest that a more complex auditory motion stimulus may have greater ability to induce cross-modal aftereffects.
Meeting abstract presented at VSS 2016
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