Journal article
The lateralized readiness potential and response kinetics in response-time tasks
Psychophysiology, Vol.38(5), pp.777-786
09/2001
DOI: 10.1111/1469-8986.3850777
PMID: 11577901
Abstract
Previous studies have found that the magnitude of the lateralized
readiness potential (LRP) at the time of response initiation
is constant across spontaneous variations in response time in
both cued and uncued, speeded tasks. Other studies have found
that the LRP is also unaffected by instructed changes in peak
response force and time to peak force in cued, self-paced tasks,
but that the LRP is sensitive to instructed changes in force
gain rate in uncued, self-paced tasks. The present study examined
the LRP in an uncued, speeded task as a function of response
time and several measures of response kinetics. The magnitude
of the LRP at the time of electromyographic onset was constant
across spontaneous variations in all measures. The peak of the
contingent negative variation did vary as a function of peak
response force and integrated force to peak, but not response
time. These findings support the idea that the LRP in speeded
tasks is a selective, on-line index of the preparation associated
with using a particular hand, and is not an index of the elements
of motor programming that determine subsequent response kinetics.
Details
- Title: Subtitle
- The lateralized readiness potential and response kinetics in response-time tasks
- Creators
- J. TOBY MORDKOFF - Department of Psychology, The Pennsylvania State University, University Park, USAMARC GROSJEAN - Department of Psychology, The Pennsylvania State University, University Park, USA
- Resource Type
- Journal article
- Publication Details
- Psychophysiology, Vol.38(5), pp.777-786
- Publisher
- Cambridge University Press
- DOI
- 10.1111/1469-8986.3850777
- PMID
- 11577901
- ISSN
- 0048-5772
- eISSN
- 1540-5958
- Number of pages
- 10
- Language
- English
- Date published
- 09/2001
- Academic Unit
- Psychological and Brain Sciences
- Record Identifier
- 9984002403602771
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