Lateralized interference in finger tapping: comparisons of rate and variability measures under speed and consistency tapping instructions

Brain and Cognition
D W KeeJ Hellige

Abstract

Forty right-handed college subjects tapped with and without a verbal task under two instructional conditions (tap as quickly as possible vs. tap as consistently as possible) and two levels of verbal production (silent vs. aloud). The tapping task consisted of the alternate tapping of two keys with the index finger of the left vs. right hands, while the verbal task was anagram solution. Three rate and four variability measures of tapping performance were evaluated in the identification of lateralized interference. The results indicate that reliable lateralized interference, more right-hand than left-hand tapping disruption, was observed only for variability measures under instructions to tap as consistently as possible. Furthermore, only one of these variability measures was sensitive to an increase in lateralized interference produced by verbal production. Because of the limited demonstration of verbal laterality effects with the two-key tapping procedure in this study, conclusions suggest that the simpler manual task of repetitive tapping of one key should be viewed as the method of choice in future dual-task studies.

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Citations

Aug 4, 2007·Perception & Psychophysics·Scott W Brown, Stephanie M Merchant
Feb 23, 2000·Neuropsychologia·K E Waldie, J L Mosley
Dec 17, 2008·Psychological Science·John W PayneMary Frances Luce
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Sep 1, 1989·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·K McFarlandA M Donald

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