Abstract

FLORES-MENDOZA, Carmen  and  ANDRADE, Daniel Marcos. How Stable is the Intelligence Over Time?: Evidence from Brazilian Data. Aval. psicol. [online]. 2022, vol.21, n.4, pp. 371-382. ISSN 1677-0471.  http://dx.doi.org/10.15689/ap.2022.2104.24041.01.

There is strong scientific evidence that intelligence remains stable from childhood to adulthood; however, no study has examined the generalizability of these findings for native Brazilian samples. Here we present a study carried out in 2002 and from 2014-2017 (average timespan of 15 years) in order to verify the stability of psychometric intelligence. A sample of 120 participants (mean age Time 1 = 10.0 yrs, mean age Time 2 = 23.6 yrs) was assessed using the Raven's Progressive Matrices and verbal subtests from the WISC-III and WAIS-III. The results indicated a moderate coefficient (around .50) for intelligence differential stability independent of the measurement administered. Regarding absolute stability, real cognitive gains were observed from Time 1 to Time 2, despite controlling the effect of the regression toward the mean. Finally, sex (female) and intelligence were statistically significant predictors of rapid educational progression.

Keywords : Wechsler verbal scales; IQ; Brazil; stability.

        · abstract in Portuguese | Spanish     · text in English     · English ( pdf )