title: Auditory dominance in motor-sensory temporal recalibration.
abstract: Perception of synchrony between one's own action (e.g. a finger tap) and the sensory feedback thereof (e.g. a flash or click) can be shifted after exposure to an induced delay (temporal recalibration effect, TRE). It remains elusive, however, whether the same mechanism underlies motor-visual (MV) and motor-auditory (MA) TRE. We examined this by measuring crosstalk between MV- and MA-delayed feedbacks. During an exposure phase, participants pressed a mouse at a constant pace while receiving visual or auditory feedback that was either delayed (+150 ms) or subjectively synchronous (+50 ms). During a post-test, participants then tried to tap in sync with visual or auditory pacers. TRE manifested itself as a compensatory shift in the tap-pacer asynchrony (a larger anticipation error after exposure to delayed feedback). In experiment 1, MA and MV feedback were either both synchronous (MV-sync and MA-sync) or both delayed (MV-delay and MA-delay), whereas in experiment 2, different delays were mixed across alternating trials (MV-sync and MA-delay or MV-delay and MA-sync). Exposure to consistent delays induced equally large TREs for auditory and visual pacers with similar build-up courses. However, with mixed delays, we found that synchronized sounds erased MV-TRE, but synchronized flashes did not erase MA-TRE. These results suggest that similar mechanisms underlie MA- and MV-TRE, but that auditory feedback is more potent than visual feedback to induce a rearrangement of motor-sensory timing.
authors.affiliation: Department of Industrial Management, Kyushu Sangyo University, 3-1 Matsukadai, 2-Chome, Higashi-ku, Fukuoka, 813-8503, Japan. sugano@ip.kyusan-u.ac.jp.
authors.forename: Yoshimori
authors.initials: Y
authors.lastname: Sugano
authors.affiliation: Department of Cognitive Neuropsychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands.
authors.forename: Mirjam
authors.initials: M
authors.lastname: Keetels
authors.affiliation: Department of Cognitive Neuropsychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands. J.Vroomen@uvt.nl.
authors.forename: Jean
authors.initials: J
authors.lastname: Vroomen
mesh_terms: D000161:Acoustic Stimulation; D000704:Analysis of Variance; D001244:Association; D001307:Auditory Perception / Q000502:physiology*; D056228:Feedback, Sensory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D011571:Psychoacoustics; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors; D013998:Time Perception; D055815:Young Adult
keywords: Motor-auditory; Motor-visual; Multisensory processing; Perception of synchrony; Tapping; Temporal recalibration