Document Detail

Asymmetry of verbal-manual interference: dissociation between rate and variability in left-handers.
MedLine Citation:
PMID:  8838388     Owner:  NLM     Status:  MEDLINE    
In two experiments, 48 right-handed and 48 left-handed adults, respectively, performed speeded and consistent finger tapping with and without concurrent oral reading. Interference was measured in terms of change in tap-to-tap rate and variability. Experiment 1 confirmed a previous report that concurrent reading decreases the rate of speeded finger tapping and increases the rate of consistent tapping in right-handers, and that the right hand is affected more than the left. Experiment 2 showed that, for left-handers, concurrent reading decreases the rate of left-hand tapping more than right-hand tapping but increases the variability of the right hand more than the left. The double dissociation in left-handers between hand and dependent variable suggests that the speed and variability reflect different mechanisms of intertask interference. More generally, the findings illustrate the multidimensionality of motor performance and the risk of making inferences about neural organization on the basis of a single dependent measure.
M Hiscock; R Inch
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain and cognition     Volume:  29     ISSN:  0278-2626     ISO Abbreviation:  Brain Cogn     Publication Date:  1995 Dec 
Date Detail:
Created Date:  1996-12-05     Completed Date:  1996-12-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8218014     Medline TA:  Brain Cogn     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-25     Citation Subset:  IM    
Department of Psychology, University of Houston, TX 77204-5341, USA.
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MeSH Terms
Brain / physiology
Functional Laterality* / physiology
Psychomotor Performance*
Verbal Behavior*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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