Effects of tone-sequence frequency changes on visible persistence of apparently moving visual stimuli

Souta Hidaka, Wataru Teramoto, Jiro Gyoba, YĆ“iti Suzuki
Poster
Time: 2009-06-30  09:00 AM – 10:30 AM
Last modified: 2009-06-04

Abstract


In a visual apparent motion display, the visual duration (visible persistence) of a moving stimulus lasts longer than usual after its offset when the moving stimulus abruptly changes its attribute (size) (Moore et al., 2007). We investigated whether and how an abrupt change in an attribute of the contingent auditory stimuli can alter the visible persistence of the stimuli in apparent motion. The visible persistence extended longer when an abrupt change in frequency was introduced into a sequence of constant tones presented synchronously with apparently moving visual stimuli than when no abrupt change or no auditory information was introduced (Experiment 1). However, an abrupt onset of a tone burst or an abrupt offset in a sequence of tone bursts did not alter the visible persistence. These results proved that the results of Experiment 1 were not attributable to changes in the perceived intensity of the visual stimuli, attentional capture to the visual changes, or response biases induced by transient auditory signal (Experiments 2 and 3). Furthermore, the effect of an abrupt change in frequency on the visible persistence attenuated when the tones were difficult to attribute to the moving visual stimuli (Experiment 4). These results suggest that the object representations of moving visual stimuli might be formed through multisensory integration of visual and auditory information.

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