Degree of handedness affects intermanual transfer of skill learning |
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Authors: | Cori Chase Rachael Seidler |
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Institution: | (1) Division of Kinesiology, University of Michigan, Ann Arbor, MI 48109-2214, USA;(2) Department of Psychology, University of Michigan, Ann Arbor, MI 48109-1109, USA;(3) 401 Washtenaw Ave., Ann Arbor, MI 48109-2214, USA |
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Abstract: | Intermanual transfer of skill learning has often been used as a paradigm to study functional specialization and hemispheric
interactions in relation to handedness. This literature has not evaluated whether degree of handedness impacts learning and
intermanual transfer. Because handedness scores are related to factors that might influence intermanual transfer, such as
engagement of the ipsilateral hemisphere during movement (Dassonville et al. in Proc Natl Acad Sci USA 94:14015–14018, 1997) and corpus callosum volume (Witelson in Science 229:665–668, 1985; Brain 112:799–835, 1989), we tested whether degree of handedness is correlated with transfer magnitude. We had groups of left and right handed participants
perform a sensorimotor adaptation task and a sequence learning task. Following learning with either the dominant or nondominant
hand, participants transferred to task performance with the other hand. We evaluated whether the magnitude of learning and
intermanual transfer were influenced by either direction and/or degree of handedness. Participants exhibited faster sensorimotor
adaptation with the right hand, regardless of whether they were right or left handed. In addition, less strongly left handed
individuals exhibited better intermanual transfer of sensorimotor adaptation, while less strongly right handed individuals
exhibited better intermanual transfer of sequence learning. The findings suggest that involvement of the ipsilateral hemisphere
during learning may influence intermanual transfer magnitude. |
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Keywords: | Handedness Learning Transfer Sequence learning Sensorimotor adaptation Motor |
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