Validation of the Escala de Inteligencia Wechsler Para Adultos
This study examined the comparability between the Wechsler Adult Intelligence Scale-Revised (WAIS-R) and its Spanish-language adaptation the Escala De Inteligencia Para Adultos (EIWA). Fifty Puerto Rican, bilingual examinees who showed equal language proficiency in English and Spanish using the Bilingual Syntax Measure II (BSM-II) were administered both intelligence tests. Results of this study showed a mean difference between the EIWA and WAIS-R of 27.7 points in the Full Scale IQ, 24.2 points in the Verbal IQ, and 28.0 points in the Performance IQ. In addition, analyses of the eleven subtests showed a significant difference ($p < .001,\ df = 49)$ across all of them indicating that the results obtained were not caused by one or two flawed subtests. Analysis of the EIWA Vocabulary subtest showed a marked difference between the published item order on both tests and the order derived from our examinees experience of item difficulty. The published order of items, based on their difficulty, correlated $+.93$ on the WAIS-R but only $+.78$ on the EIWA with the actual experience of the examinees. No significance was found in the way that the subtests correlate with the Full Scale IQ on either of the intelligence tests. This finding supports the notion that the factor-analytic structure of the EIWA closely resembles that of the WAIS-R. A regression equation between the two Full Scale IQs and a table showing equipercentile equating between the two tests is demonstrated. It was concluded that the differences found between scores generated by the EIWA and the WAIS-R were significant. The research supports the belief that the EIWA is in need of a complete restandardization.
Maldonado, Carlos Y, "Validation of the Escala de Inteligencia Wechsler Para Adultos" (1995). ETD Collection for Fordham University. AAI9520611.