Influence of family socioeconomic status on IQ, language, memory and executive functions of Brazilian children

Abstract The aim of this study was to assess the effect of family socioeconomic status (SES) and parental education on non-verbal IQ and on the processing of oral and written language, working memory, verbal memory and executive functions in children from different age ranges. A total of 419 Brazilian children aged 6­12 years old, attending public and private schools from Porto Alegre, RS participated in the study. Structural equation analyzes revealed that in the general model (for all ages), the SES contributed to cognitive performance ­ IQ, verbal memory, working memory, oral and written language and executive functions (28, 19, 36, 28 and 25 %, respectively). SES had stronger effects on younger children (up to nine years old), in most cognitive tasks examined. Probably, after this age, a combination of factors such as schooling, living in other social environments, among others, may mitigate the effects of family socioeconomic status.

Variáveis psicossociais e desempenho em leitura de crianças de baixo nível socioeconômico / Psychosocial Variables and Reading Performance of Children with Low Socioeconomic Status

Este estudo longitudinal investigou a contribuição de fatores psicossociais para o desempenho em leitura de crianças. Participaram 59 mães e seus filhos aos 4 meses, 2, 5-6 e 9-11 anos. Correlacionou-se o desempenho em leitura das crianças a variáveis psicossociais. Encontrou-se correlações negativas entre morbidade psiquiátrica materna na primeira infância e leitura de palavras irregulares e entre o número de familiares que residiam com a criança aos 2 e 5-6 anos e o desempenho na leitura de palavras. A renda familiar aos 2 anos correlacionou-se positivamente com compreensão textual. Entretanto, apenas o número de familiares que residiam com a criança foi preditor do desempenho em leitura de palavras. Conclui-se que o desempenho em leitura relaciona-se a fatores psicossociais.

This longitudinal study investigated the impact of psychosocial factors on reading performance of children with low socioeconomic status. Fifty nine mothers and their children at 4 months, 2, 5-6 and 9-11 years of age participated. The children's reading performance was correlated with psychosocial variables. Negative correlations were found between maternal psychiatric morbidity in early childhood and reading of irregular words, and between the number of family members living with the child at 2 and 5-6 years and word reading performance. Family income at 2 years correlated positively with reading comprehension. However, only the number of family members who lived with the child was a predictor of reading performance. The results indicate that reading performance is related to psychosocial factors.