Sound increases the saliency of visual events.
We show that concurrent auditory stimuli can enhance the visual system's ability to detect brief visual events. Participants indicated which of two visual stimuli was briefly blinked off. A spatially non-aligned auditory cue - simultaneous with the blink - significantly enhanced subjects' detection ability, while a visual cue decreased detection ability relative to a no-cue condition. Control experiments indicate that the auditory-driven enhancement was not attributable to a warning effect. Also, the enhancement did not depend on an exact temporal alignment of cue-target onsets or offsets. In combination, our results provide evidence that the sound-induced enhancement is not due to a sharpening of visual temporal responses or apparent prolongation of the visual event. Rather, this enhancement seems to reflect an increase in phenomenal visual saliency.
Noesselt
Toemme
T
Department of Neurology II and Center for Advanced Imaging, Otto-von-Guericke-University, Leipziger Street 44, 39120 Magdeburg, Germany. toemme@med.ovgu.de
Bergmann
Daniel
D
Hake
Maria
M
Heinze
Hans-Jochen
HJ
Fendrich
Robert
R
D000161:Acoustic Stimulation / Q000379:methods; D000328:Adult; D000704:Analysis of Variance; D001307:Auditory Perception / Q000502:physiology; D001767:Blinking / Q000502:physiology*; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology*; D013016:Sound; D014796:Visual Perception / Q000502:physiology*