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Head Tracking of Auditory, Visual, and Audio-Visual Targets

Identifieur interne : 000189 ( Pmc/Corpus ); précédent : 000188; suivant : 000190

Head Tracking of Auditory, Visual, and Audio-Visual Targets

Auteurs : Johahn Leung ; Vincent Wei ; Martin Burgess ; Simon Carlile

Source :

RBID : PMC:4701932

Abstract

The ability to actively follow a moving auditory target with our heads remains unexplored even though it is a common behavioral response. Previous studies of auditory motion perception have focused on the condition where the subjects are passive. The current study examined head tracking behavior to a moving auditory target along a horizontal 100° arc in the frontal hemisphere, with velocities ranging from 20 to 110°/s. By integrating high fidelity virtual auditory space with a high-speed visual presentation we compared tracking responses of auditory targets against visual-only and audio-visual “bisensory” stimuli. Three metrics were measured—onset, RMS, and gain error. The results showed that tracking accuracy (RMS error) varied linearly with target velocity, with a significantly higher rate in audition. Also, when the target moved faster than 80°/s, onset and RMS error were significantly worst in audition the other modalities while responses in the visual and bisensory conditions were statistically identical for all metrics measured. Lastly, audio-visual facilitation was not observed when tracking bisensory targets.


Url:
DOI: 10.3389/fnins.2015.00493
PubMed: 26778952
PubMed Central: 4701932

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