SSW: RIGHT-HANDED VERSUS LEFT-HANDED

Araújo S, Conceição T, Ferreira S, Marques D, Mateus T, Pedrosa S, Serrano M

Escola Superior de Tecnlogia da Saúde de Coimbra. Viseu, Portugal.

The purpose of this scientific article is to verify the inter-hemispheric differences in oral and dichotic language between right-handed and left-handed people. The sample was made up of 15 right-handed and 15 left-handed people. History of otological, neurogical and psychic pathology was considered an exclusion factor. Other exclusion factors include otoscopy with obliterating wax; Timpanogram C2 or uni or bilateral B; absence of ipsi and/or contra lateral reflexes to 500Hz, 1000Hz and 2000Hz; absence of acoustic otoemissions by distortion products in frequencies between 1257Hz and 6348Hz. We used an inclusion and a specific selection of the sample survey and a SSW dichotic audition test. In the study, we concluded that a dichotic hearing between right-handed and left-handed people in the noncompetitive left variable represents significant statistical differences, were right-handed people have less number of errors; in the other variables it was not observed significant statistical differences between right-handed and left-handed people. However, in the noncompetitive right variable and competitive left, we observed a less number of errors in left-handed people and in the other variables in study (competitive right, noncompetitive left, right error, left error, percentage of errors in the right ear, percentage of errors in the left ear and total percentage of errors) in right-handed people. Even though the left hemisphere appears to be dominant for the language process in right-handed people and the right hemisphere dominant for the left-handed people, with this study we can affirm that it was not observed differences between them in dichotic hearing (studied by SSW).

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