| Abstract [eng] |
WAIS–III (Wechsler Adult‘s Intelligence Scale - Third edition) – is one of the most widely used intelligence measuring scale in the world, which has also been adapted in Lithuania. A significant part of researches is related to scale‘s bias – one of it‘s sources is Differential item functioning in separate groups, when participants have the same abilities. The aim of this work was to assess the bias of verbal subtests items in Lithuanian WAIS-III version. Differential item functioning was tested comparing groups by sex (128 males and 172 females) and education (209 participants had a secondary and lower education, 89 had further and university education), in six WAIS-III subtests (Picture Completion, Vocabulary, Similarities, Arithmetic, Information and Comprehension). Data analysis showed that 20 items from 148 were functioning differently for males and females, and 19 items functioned differently in groups by education (the differences were mostly in Vocabulary and Information subtests). The biggest part of differences were of uniform DIF – the number was very similar in males and females groups, also in education groups. The bigger part of nonuniform DIF were more discriminating for females than males and participants with secondary and lower education. |
