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Thesis

Task transfer to the non-dominant hand: A comparison between right-handers and left-handers

1 May 1990

Abstract

The study compared 32 normal right-handed (n=16) and left-handed (n=16) individuals in their ability to transfer a tracing task to their non-dominant hand, based on accuracy scores over three separate trials. All subjects were randomly assigned to one of four equal sized (n=8) experimental groups: (1) right control, (2) left control, (3) right practice, and (4) left practice. Unlike the control subjects, all practice subjects had an opportunity to practice the tracing task with their dominant hano, In b~tWeel1 the baseline and 2 minute posttest trials. Accuracy was determined by the number of times the tracing exited or touched the bordered square within the time limit. A 2 X 2 X 3 (hand X practice condition X trial) ANOVA with the last factor repeated and a Scheffe post hoc test revealed a significant (p < .05) interaction effect between the practice condition and the trial. Inter-trial practice had a negative effect on accuracy scores. Left-handed subjects performed and retained the task better than their right-handed counterparts, regardless of trial or practice condition. The results suggest that left-handers may have an advantage at transferring tasks to their non-dominant side.


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