title: Phase correction, phase resetting, and phase shifts after subliminal timing perturbations in sensorimotor synchronization.
abstract: Recent studies of synchronized finger tapping have shown that perceptually subliminal phase shifts in an auditory sequence are rapidly compensated for in the motor activity (B. H. Repp, 2000a). Experiment 1 used a continuation-tapping task to confirm that this compensation is indeed a phase correction, not an adjustment of the central timekeeper period. Experiments 2-5 revealed that this phase correction occurs even when there is no ordinary sensorimotor asynchrony--when the finger taps are in antiphase or arbitrary phase relative to the auditory sequence (Experiments 2 and 3) or when the tap coinciding with the sequence phase shift is withheld (Experiments 4 and 5). The phase correction observed in the latter conditions was instantaneous, which suggests that phase resetting occurs when the motor activity is discontinuous. A prolonged phase shift suggestive of overcompensation was observed in some conditions, which poses a challenge to pure phase correction models.
authors: Haskins Laboratories, 270 Crown Street, New Haven, Connecticut 06511-6695, USA. repp@haskins.yale.edu
authors: B H
authors: BH
authors: Repp
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001288:Attention; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D009146:Music; D011571:Psychoacoustics; D011601:Psychophysics; D013360:Subliminal Stimulation; D013998:Time Perception