PMID: 16509107Mar 3, 2006Paper

Concurrent counting and typing: lateralized interference depends on a difference between the hands in motor skill

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Merrill HiscockStacey Wood

Abstract

In previous demonstrations of differences between left- and right-handers in dual-task performance, participants' hand preference has been confounded with asymmetry of manual skill. The present study was designed to disentangle those two factors as sources of lateralized interference in the concurrent-task paradigm. Forty-eight normal adults (24 females and 24 males) counted backward by ones or by twos while typing an easy or difficult sequence of letters with either hand. When participants were grouped according to self-reported hand preference, both groups showed bilaterally symmetric slowing, relative to single-task conditions. However, when the same participants were grouped according to manual asymmetry in the baseline condition, the cognitive task interfered significantly more with the faster hand than with the slower hand. Baseline typing rate, averaged across hands, did not influence dual-task interference. Both self-reported left-hand preference and left-hand superiority in baseline typing were associated with reduced interference on the cognitive task, and the reduced interference in those groups seemed to reflect relatively loose coupling between manual and cognitive tasks. The results support and extend Caroselli et...Continue Reading

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Citations

Nov 19, 2011·Journal of Clinical and Experimental Neuropsychology·Alissa K HollandDavid W Harrison
Feb 21, 2013·Acta Psychologica·David Moreau
Nov 30, 2007·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Roberto Cubelli, Sergio Della Sala
Aug 19, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Sergio Della Sala, Joanna Brooks
Mar 21, 2007·Joint Commission Journal on Quality and Patient Safety·John ChuoRodney W Hicks

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