Estudo do funcionamento diferencial do item em um instrumento de avaliaÃÃo da personalidade / Study of differential item functioning in a personality assessment instrument

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

23/02/2012

RESUMO

Studies relating personality traits and intelligence (from the psychometric point of view) are quite new and have been expanding due to the fact that the intelligence may interfere on the way people respond to personality tests (and vice-versa). This research wanted to verify, based on DIF estimates, the influence of intelligence levels, sex, and education on the responses to a personality self-portrait instrument. The sample was composed of 161 high-school and college students from both genders, who answered a BFP and two subtests of BPR-5 (abstract and verbal). For the DIF estimates, it is required to work with 2 groups; therefore the division of groups was according to gender and education. And for the intelligence level, the participants were separated into two groups: low and high average. The estimates of each groupâs difficulties in the 126 items that form the personality instrument were calculated and compared in order to check whether DIF was present or not. Two DIF measurement criteria were applied. The results with Mantel-HanzelÂs (contrast higher than 0.42) showed that none of the items presented DIF. However, taking into consideration Probability Difference Indices (lower than 0.05), we found that out of 126 items, DIF was present in the groups as follows: 11 for the intelligence level; 17 for education; and 22 for gender. Thus, it is possible to verify that a small amount of items were influenced by the intelligence level of the participants. Gender and the Aperture factor influenced DIF the most.

ASSUNTO(S)

personalidade tri inteligÃncia dif personality tri intelligence dif psicologia

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