Participation in a home visiting program predicted maternal but not child vocabulary diversity: a pragmatic randomized trial in Brazil

dc.creatorVescovi, Gabriela
dc.creatorMunhoz, Tiago Neuenfeld
dc.creatorRowe, Meredith L.
dc.creatorAltafim, Elisa Rachel Pisani
dc.creatorSantos, Iná da Silva dos
dc.creatorManitto, Alicia Matijasevich
dc.creatorSalum, Cristiane Otero Reis
dc.creatorCorreia, Luciano Lima
dc.creatorLira, Pedro Israel Cabral de
dc.creatorSantos, Letícia Marques dos
dc.creatorSouza, Marta Rovery de
dc.date.accessioned2025-09-26T12:49:12Z
dc.date.available2025-09-26T12:49:12Z
dc.date.issued2025
dc.description.abstractThe Criança Feliz (Happy Child) parenting program is a home visiting intervention serving over a million low-income Brazilian families. The current study assessed its longitudinal associations with maternal and child speech and gestures in a subsample (n = 145) from the program’s impact evaluation research. We performed a between-participants pragmatic randomized trial. Mothers (79.7% Black) and children (17–25 months of age; 50.3% female) were randomly assigned to control (n = 73) and intervention (n = 72) groups. One year later, mother–child pairs were recorded playing at home, and the videos were transcribed and analyzed for speech (quantity, vocabulary diversity, sentence complexity, and number of questions) and gestures (quantity). Intention-to-treat analysis revealed that the intervention was associated with the mother’s vocabulary diversity (d = .35) regardless of schooling level. No direct or indirect (via maternal speech) associations were observed with the child’s speech or gestures. This preliminary evidence suggests that participation in the Criança Feliz program is related to mothers’ vocabulary diversity but not to children’s speech or gesture measures. The program could focus on maternal gestures, questions, and book reading (complexity feature). Future research evaluating the impact of the program on language outcomes should include pretesting and child follow-up assessments.
dc.identifier.citationVESCOSI, Gabriela et al. Participation in a home visiting program predicted maternal but not child vocabulary diversity: a pragmatic randomized trial in Brazil. Journal of Experimental Child Psychology, New York, v. 254, e106216, 2025. DOI: 10.1016/j.jecp.2025.106216. Disponível em: https://www.sciencedirect.com/science/article/pii/S0022096525000220?via%3Dihub. Acesso em: 24 set. 2025.
dc.identifier.doi10.1016/j.jecp.2025.106216
dc.identifier.issn0022-0965
dc.identifier.issne- 1096-0457
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0022096525000220?via%3Dihub
dc.language.isoeng
dc.publisher.countryEstados unidos
dc.publisher.departmentInstituto de Patologia Tropical e Saúde Pública - IPTSP (RMG)
dc.rightsAcesso Restrito
dc.subjectParenting programs
dc.subjectChild-directed speech
dc.subjectLanguage
dc.subjectGestures
dc.subjectEarly intervention
dc.subjectVocabulary
dc.titleParticipation in a home visiting program predicted maternal but not child vocabulary diversity: a pragmatic randomized trial in Brazil
dc.typeArtigo

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