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Cognitive performance of right-handed and left-handed persons on the Wechsler Adult Intelligence Scale (WAIS-III)
AIM. To contribute to the knowledge of the cognitive differences existent between right-handed and left-handed evaluating the cognitive outcome in a group of adults right-handed and another group of left-handed of similar characteristic (age, gender, cultural level) by means of the Wechsler Adult Intelligence Scale (WAIS-III).
SUBJECTS AND METHODS. Two groups were studied: one formed by 25 right-handed (RHG) and another formed by 25 left-handed (LHG). None of those subject of the study presented mental deficiency neither neurological dysfunctions. The age stocking was of 24.28 years, with a range between 20 and 28 years.
RESULTS. There are not differences in the intellectual quotient (verbal and performance), among the two groups. The LHG obtains worse results that the right-handed in speed of prosecution and in the subtests of arithmetic and key, while the RHG has obtained better results in the subtest of incomplete figures.
CONCLUSIONS. The LHG has a cognitive yield similar to that of the RHG, with slight deficiencies in activities of visoperceptual component. It becomes necessary to continue deepening in the neuropsychological and cognitive differences between right-handed and left-handed, since the cognitive outcome of the left-handed ones continues being a topic in discussion.