Supporting Reading Aloud Beginning Prenatally and in Early Infancy: A Randomized Trial in Brazil

A previous study of a reading aloud intervention in Brazil, called Universidade do Bebê (UBB), demonstrated impacts on parenting and child outcomes for families with toddlers and preschoolers, even for parents with low literacy, and cognitive stimulation mediated effects on child outcomes. In a new study, we sought to determine whether similar results would be found when UBB was provided beginning in pregnancy through early toddlerhood, including (1) impacts on parenting and child development, (2) variation in impact on parenting and child outcomes by parent literacy level, and (3) indirect impacts on child outcomes through cognitive stimulation.

Women with low income who were either pregnant or with children aged 0 to 24 months were randomized to UBB or control groups. UBB consisted of monthly workshops focused on reading aloud complemented by a book-lending library. Participants were evaluated at baseline and approximately 11 months later (M = 11.0, SD = 0.4; range 9.9-12.2 months) on parenting (cognitive stimulation, beliefs about early reading, screen time, and discipline) and child development.

Four hundred families (n = 200 UBB) were randomized; 286 (71.5%; n = 150 UBB) received 11-month follow-up. UBB families showed increased cognitive stimulation (Cohen's d = 0.92) and awareness about the importance of early reading ( d = 0.90) than controls, with no differences by parent literacy level. UBB was associated with reduced screen time and increased vocabulary, but only for families with low parent literacy. UBB effects on child outcomes were mediated by cognitive stimulation.

The findings support implementation of reading aloud programs beginning in pregnancy and early childhood.