AGRADECIMENTOSAo João, por ser meu companheiro nos pequenos e grandes projetos da vida. Pelo exemplo de dedicação, ética e entusiasmo pela ciência. Obrigada por me acolher, me dar forças e por suas incontáveis contribuições neste trabalho, que não seria o mesmo sem você. À minha família, pela permanente torcida e todo afeto despendido ao longo de minha vida.À Lari e Ste, por todo apoio, leitura e sugestões. Nossos encontros semanais ajudaram incontestavelmente na construçãodeste trabalho e mostraram que a distância não é impeditiva nos laços de amizade e nas trocas de conhecimento.Aos meus amigos queridos, Vanessa, Ni, Pri, Gustavo, Giu, Ju Moreira e Mari, por sempre me escutarem e me acolherem. Sem deixar de esquecer das minhas amigas da faculdade, Camila, Virgínia, Julia e Ana, pelos velhos e novos tempos. A vida é mais colorida ao lado de vocês. À Prof. Ana Paula Ramos de Souza, por ter se disposto a embarcar neste trabalho comigo, obrigada pelos aprendizados, pelas tantas referências compartilhadas e seu esforço por se fazer presente nas bancas.Palavras-chave: Desenvolvimento de linguagem. Bebês. Autismo. Irmãos.Desenvolvimento Psíquico. ABSTRACT LINGUISTIC INTERACTIONS BETWEEN BABIES BROTHERS OF CHILDREN WITH AUTISM SPECTRUM DISORDERS AND THEIR MOTHERSThis study aims to verify if the condition of a baby with an older brother with Autism Spectrum Disorder (ASD) is associated with a greater absence of enunciative signs of language acquisition in comparison to those infants who do not have a sibling with this diagnosis. The SEAL instrument was applied in 80 double mother-babies, with infants up to 12 months and 29 days, 38 of the case group (infants of children with ASD) and 42 of the control group (infants siblings of children without ASD). The database is secondary, being taken from the research "Vulnerability of parents and siblings of children with autism spectrum disorder", with coordination of Prof. Dr. Rogério Lerner of the Institute of Psychology of USP. As secondary objectives, this study aimed to investigate whether children who were flagged with developmental difficulty by the IRDI instrument (Indicators of Risk for Child Development) and signaled with withdrawal by the ADBB (Alarm Distress Baby Scale) instrument were also those indicated with language difficulty by SEAL. Given a low correlation found, a vignette of the filmed material of a mother-infant indicated only by SEAL was discussed qualitatively. The theoretical discussion is based on authors based on the enunciative perspective, on which the SEAL is based, in addition to the theory of emotional development of the psychoanalyst Donald Winnicott. It was found in the results that infants of the first sub-age group (2 months to 6 months and 29 days) of the group had more language difficulties than those in the control group and that infants of the second sub-age group (7 months to 12 months and 29 days) of the group if they have less language difficulties, when compared to the control group, contrary to expectations. In addition, infants of the...

Siblings of children with autism spectrum disorders (ASD) present greater susceptibility to developmental problems, in comparison with siblings of typically developing children. The greater prevalence of mental health disorders among parents of children with ASD increases younger siblings’ vulnerability to emotional problems. The aim of this study is to compare the interaction between carers and babies aged 2 to 26 months (M = 11.7, SD = 6.9) who are siblings of children with ASD (ASD dyads) with the interaction of dyads of siblings of typically developing children (TD dyads). The protocol of Clinical Indicators of Risk for Child Development and the Coding Interactive Behaviour measures were used to evaluate interaction. ASD dyads presented higher scores of constriction in their interaction, P = .024, with babies presenting higher scores of withdrawal behavior, P = .003, and carers presenting higher scores of depressive mood, P = .008, when compared to TD dyads. The ASD dyads have interactive impairments more frequently than do the TD dyads.