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Sinais quantitativos e qualitativos sugestivos de lesão cerebral na escala de inteligência de wechsler para adultos 3ª edição (WAIS-III)
Publication . Montera, Marta de Assunção Gonçalves 1975-; Caldas, Alexandre de Castro, 1948-; Simões, Mário Manuel Rodrigues
OBJECTIVE. The Wechsler Adult Intelligence Scale 3rd edition (WAIS-III) was standardized in Portugal in 2008. The present study aimed to validate this battery of 14 subtests to different groups of acquired brain lesion. METHODS: A final group of 81 brain injured patients (namely Traumatic Brain Injury, Primary Brain Tumor, Refractory Epilepsy and Cerebro-Vascular Disease) were assessed with a comprehensive neuropsychological battery of tests, which included the Portuguese WAIS-III full form. A control group performance data was selected from the standardization sample, demographically matched to the clinical group regarding gender, age, education, profession and geographic region. RESULTS: When looking at the WAIS-III full form, results were discouraging, because they failed to discriminate brain injured patients from controls. Statistical differences when present, failed to have clinical implications, because clinical and control groups both performed within the normal range. Yet, multiple regression analysis has demonstrated that brain lesion and literacy influence WAIS-III performance. When partial use of the WAISIII was taken into account, more encouraging results emerged. Vocabulary raised up as a good measure of premorbid verbal intelligence. A seven subtest short-form with acceptable psychometric qualities was found for the refractory epileptic group. DISCUSSION: The effects found are not large enough to be of clinical usefulness, but readers should understand that the absence of evidence does not equal evidence of absence. We strongly encourage WAIS-III clinical research to be organized aiming to have homogeneous groups according to brain lesion locations.
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Fundação para a Ciência e a Tecnologia
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SFRH
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SFRH/BD/68842/2010