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Studies have shown an increase in intelligence test scoresacross decades � the �Flynn effect�. Nevertheless, the factthat this effect has not been consistently observed whendifferent sources of cognitive ability are used is one ofthe main topics of discussion. Thus, the present researchaimed to shed some light on this issue. Two studies usingdifferent cognitive ability measures were designed in orderto control for potential measure effects. Children wereBrazilian, aged between 6-12 years. The first study hadthe Draw-a-Person test as a measure of intelligence; 294children were assessed during 1980 decade, whilst 203were assessed during the 2000 decade. The second studyused the Raven�s Coloured Progressive Matrices. A total of 562 children were assessed during 1990 decade, and 243in 2000 decade. Results showed no significant generationeffects regardless of the measure used. Educational and socialaspects are considered in order to explain these results.
