Phase correction in sensorimotor synchronization: nonlinearities in voluntary and involuntary responses to perturbations.

Full Abstract

When finger taps are synchronized with an auditory sequence, both a global phase shift (PS) and a local event onset shift (EOS) in the sequence elicit a phase correction response (PCR) on the next tap. The PCR to an expected PS is intended and large, whereas that to an expected EOS is unintended and smaller. PCR magnitude increases linearly with perturbation magnitude up to about +/-15% of the sequence period (500 milliseconds). With larger perturbations, voluntary PCRs increase more slowly whereas involuntary PCRs reach an asymptote. These results, obtained previously in a blocked design [J. Exp. Psychol. Human Percept. Perform. (in press)], were replicated in a randomized design and in two additional task contexts that varied participants' intentions while neutralizing their expectations. Neither design nor expectations seemed to play a role. However, considerable individual differences were noted. The results confirm that phase correction is partially automatic and partially subject to voluntary control, and they provide empirical estimates of error correction functions that may be useful in formal modeling of sensorimotor synchronization behavior.

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Author information

Author/s: Repp, Bruno H (BH);

Affiliation: Haskins Laboratories, 270 Crown Street, New Haven, CT 06511-6695, USA. repp(-atsign-)haskins.yale.edu

Grants: MH-51230 (Agency:NIMH NIH HHS)

Journal and publication information

Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, P.H.S.

Journal: Human movement science (Hum Mov Sci), published in Netherlands. (Language: eng)

Reference: 2002-Apr; vol 21 (issue 1) : pp 1-37

Dates: Created 2002/05/01; Completed 2002/08/19; Revised 2007/11/14;

PMID: 11983432, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult
Attention
Female
Humans
Individuality

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