The effects of hand preference and gender on finger tapping performance asymmetry by the use of an infra-red light measurement device |
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Authors: | Schmidt S L Oliveira R M Krahe T E Filgueiras C C |
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Affiliation: | Laboratório de Neurofisiologia e Avalia??o Neurocomportamental, Universidade do Estado do Rio de Janeiro, Pavilh?o Américo Piquet Carneiro - 5 degrees andar, Vila Izabel, Rio de Janeiro, RJ, 20551030, Brazil. schmidt@uerj.br |
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Abstract: | We used an infra-red device to study the effects of gender and handwriting preference on manual asymmetry in tapping rate and intertap variability. Our sample (n=102) consisted of approximately equal number of subjects with respect to gender (52 women and 50 men) and handedness (52 right-handers and 50 left-handers). Data on overall performance indicated that men performed more quickly and regularly than women. The index used for measuring manual asymmetry was the difference between the hands as a proportion of the total. Therefore, the asymmetry index was adjusted to remove the influence of overall performance. The analyses based on asymmetry scores indicated a significant handedness effect: right-handers showed greater manual asymmetries than left-handers for both tapping rate and intertap variability. In addition, right handers exhibited a significant greater asymmetry for intertap variability than tapping rate. Taken together, these data may reflect greater hemispheric differences in right-handers, specially for intertap variability. |
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