Auditory grouping occurs prior to intersensory pairing: evidence from temporal ventriloquism.
The authors examined how principles of auditory grouping relate to intersensory pairing. Two sounds that normally enhance sensitivity on a visual temporal order judgement task (i.e. temporal ventriloquism) were embedded in a sequence of flanker sounds which either had the same or different frequency (Exp. 1), rhythm (Exp. 2), or location (Exp. 3). In all experiments, we found that temporal ventriloquism only occurred when the two capture sounds differed from the flankers, demonstrating that grouping of the sounds in the auditory stream took priority over intersensory pairing. By combining principles of auditory grouping with intersensory pairing, we demonstrate that capture sounds were, counter-intuitively, more effective when their locations differed from that of the lights rather than when they came from the same position as the lights.
Keetels
Mirjam
M
Department of Psychology, Tilburg University, Warandelaan 2, Tilburg, The Netherlands.
Stekelenburg
Jeroen
J
Vroomen
Jean
J
D000161:Acoustic Stimulation; D001288:Attention / Q000502:physiology; D006801:Humans; D007088:Illusions / Q000502:physiology*; D007600:Judgment / Q000502:physiology*; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D013017:Sound Localization / Q000502:physiology*; D013028:Space Perception / Q000502:physiology; D013997:Time Factors; D013998:Time Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*