Behavioral, cognitive, and adaptive development in infants with autism spectrum disorder in the first 2 years of life / A. ESTES in Journal of Neurodevelopmental Disorders, 7-1 (December 2015)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.24 Titre : Behavioral, cognitive, and adaptive development in infants with autism spectrum disorder in the first 2 years of life Type de document : Texte imprimé et/ou numérique Auteurs : A. ESTES, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; H. GU, Auteur ; T. ST JOHN, Auteur ; S. PATERSON, Auteur ; J. T. ELISON, Auteur ; Heather C. HAZLETT, Auteur ; Kelly N. BOTTERON, Auteur ; Stephen R. DAGER, Auteur ; Robert T. SCHULTZ, Auteur ; P. KOSTOPOULOS, Auteur ; A. EVANS, Auteur ; G. DAWSON, Auteur ; J. ELIASON, Auteur ; S. ALVAREZ, Auteur ; J. PIVEN, Auteur Article en page(s) : p.24 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND: To delineate the early progression of autism spectrum disorder (ASD) symptoms, this study investigated developmental characteristics of infants at high familial risk for ASD (HR), and infants at low risk (LR). METHODS: Participants included 210 HR and 98 LR infants across 4 sites with comparable behavioral data at age 6, 12, and 24 months assessed in the domains of cognitive development (Mullen Scales of Early Learning), adaptive skills (Vineland Adaptive Behavioral Scales), and early behavioral features of ASD (Autism Observation Scale for Infants). Participants evaluated according to the DSM-IV-TR criteria at 24 months and categorized as ASD-positive or ASD-negative were further stratified by empirically derived cutoff scores using the Autism Diagnostic Observation Schedule yielding four groups: HR-ASD-High, HR-ASD-Moderate (HR-ASD-Mod), HR-ASD-Negative (HR-Neg), and LR-ASD-Negative (LR-Neg). RESULTS: The four groups demonstrated different developmental trajectories that became increasingly distinct from 6 to 24 months across all domains. At 6 months, the HR-ASD-High group demonstrated less advanced Gross Motor and Visual Reception skills compared with the LR-Neg group. By 12 months, the HR-ASD-High group demonstrated increased behavioral features of ASD and decreased cognitive and adaptive functioning compared to the HR-Neg and LR-Neg groups. By 24 months, both the HR-ASD-High and HR-ASD-Moderate groups demonstrated differences from the LR- and HR-Neg groups in all domains. CONCLUSIONS: These findings reveal atypical sensorimotor development at 6 months of age which is associated with ASD at 24 months in the most severely affected group of infants. Sensorimotor differences precede the unfolding of cognitive and adaptive deficits and behavioral features of autism across the 6- to 24-month interval. The less severely affected group demonstrates later symptom onset, in the second year of life, with initial differences in the social-communication domain. En ligne : http://dx.doi.org/10.1186/s11689-015-9117-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=347 [article] Behavioral, cognitive, and adaptive development in infants with autism spectrum disorder in the first 2 years of life [Texte imprimé et/ou numérique] / A. ESTES, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; H. GU, Auteur ; T. ST JOHN, Auteur ; S. PATERSON, Auteur ; J. T. ELISON, Auteur ; Heather C. HAZLETT, Auteur ; Kelly N. BOTTERON, Auteur ; Stephen R. DAGER, Auteur ; Robert T. SCHULTZ, Auteur ; P. KOSTOPOULOS, Auteur ; A. EVANS, Auteur ; G. DAWSON, Auteur ; J. ELIASON, Auteur ; S. ALVAREZ, Auteur ; J. PIVEN, Auteur . - p.24. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 7-1 (December 2015) . - p.24 Index. décimale : PER Périodiques Résumé : BACKGROUND: To delineate the early progression of autism spectrum disorder (ASD) symptoms, this study investigated developmental characteristics of infants at high familial risk for ASD (HR), and infants at low risk (LR). METHODS: Participants included 210 HR and 98 LR infants across 4 sites with comparable behavioral data at age 6, 12, and 24 months assessed in the domains of cognitive development (Mullen Scales of Early Learning), adaptive skills (Vineland Adaptive Behavioral Scales), and early behavioral features of ASD (Autism Observation Scale for Infants). Participants evaluated according to the DSM-IV-TR criteria at 24 months and categorized as ASD-positive or ASD-negative were further stratified by empirically derived cutoff scores using the Autism Diagnostic Observation Schedule yielding four groups: HR-ASD-High, HR-ASD-Moderate (HR-ASD-Mod), HR-ASD-Negative (HR-Neg), and LR-ASD-Negative (LR-Neg). RESULTS: The four groups demonstrated different developmental trajectories that became increasingly distinct from 6 to 24 months across all domains. At 6 months, the HR-ASD-High group demonstrated less advanced Gross Motor and Visual Reception skills compared with the LR-Neg group. By 12 months, the HR-ASD-High group demonstrated increased behavioral features of ASD and decreased cognitive and adaptive functioning compared to the HR-Neg and LR-Neg groups. By 24 months, both the HR-ASD-High and HR-ASD-Moderate groups demonstrated differences from the LR- and HR-Neg groups in all domains. CONCLUSIONS: These findings reveal atypical sensorimotor development at 6 months of age which is associated with ASD at 24 months in the most severely affected group of infants. Sensorimotor differences precede the unfolding of cognitive and adaptive deficits and behavioral features of autism across the 6- to 24-month interval. The less severely affected group demonstrates later symptom onset, in the second year of life, with initial differences in the social-communication domain. En ligne : http://dx.doi.org/10.1186/s11689-015-9117-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=347

Brief Report: Executive Function as a Predictor of Academic Achievement in School-Aged Children with ASD / T. ST JOHN in Journal of Autism and Developmental Disorders, 48-1 (January 2018)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 48-1 (January 2018) . - p.276-283 Titre : Brief Report: Executive Function as a Predictor of Academic Achievement in School-Aged Children with ASD Type de document : Texte imprimé et/ou numérique Auteurs : T. ST JOHN, Auteur ; G. DAWSON, Auteur ; A. ESTES, Auteur Article en page(s) : p.276-283 Langues : Anglais (eng) Mots-clés : Academic achievement  Autism  Inhibition  Math  Set shifting  Working memory Index. décimale : PER Périodiques Résumé : The contributions of Executive Function (EF) to academic achievement in children with Autism Spectrum Disorder (ASD) are not well understood. Academic achievement and its association with EF is described in 32, 9-year-old children with ASD. EF at age 6 and 9, and academic achievement at age 9 were assessed as part of a larger longitudinal study. Better performance on a Spatial Reversal task but not A-not-B with Invisible Displacement at age 6 was associated with better math achievement at age 9. No relationship was found between these EF measures at age 6 and reading or spelling achievement at age 9. Future studies are needed to explore whether improving early EF skills can increase math achievement in children with ASD. En ligne : https://doi.org/10.1007/s10803-017-3296-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=337 [article] Brief Report: Executive Function as a Predictor of Academic Achievement in School-Aged Children with ASD [Texte imprimé et/ou numérique] / T. ST JOHN, Auteur ; G. DAWSON, Auteur ; A. ESTES, Auteur . - p.276-283. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 48-1 (January 2018) . - p.276-283 Mots-clés : Academic achievement  Autism  Inhibition  Math  Set shifting  Working memory Index. décimale : PER Périodiques Résumé : The contributions of Executive Function (EF) to academic achievement in children with Autism Spectrum Disorder (ASD) are not well understood. Academic achievement and its association with EF is described in 32, 9-year-old children with ASD. EF at age 6 and 9, and academic achievement at age 9 were assessed as part of a larger longitudinal study. Better performance on a Spatial Reversal task but not A-not-B with Invisible Displacement at age 6 was associated with better math achievement at age 9. No relationship was found between these EF measures at age 6 and reading or spelling achievement at age 9. Future studies are needed to explore whether improving early EF skills can increase math achievement in children with ASD. En ligne : https://doi.org/10.1007/s10803-017-3296-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=337

Diagnostic shifts in autism spectrum disorder can be linked to the fuzzy nature of the diagnostic boundary: a data-driven approach / B. TUNC in Journal of Child Psychology and Psychiatry, 62-10 (October 2021)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 62-10 (October 2021) . - p.1236-1245 Titre : Diagnostic shifts in autism spectrum disorder can be linked to the fuzzy nature of the diagnostic boundary: a data-driven approach Type de document : Texte imprimé et/ou numérique Auteurs : B. TUNC, Auteur ; J. PANDEY, Auteur ; T. ST JOHN, Auteur ; S. S. MEERA, Auteur ; J. E. MALDARELLI, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; Heather C. HAZLETT, Auteur ; Stephen R. DAGER, Auteur ; Kelly N. BOTTERON, Auteur ; J. B. GIRAULT, Auteur ; R. C. MCKINSTRY, Auteur ; R. VERMA, Auteur ; J. T. ELISON, Auteur ; J. R. PRUETT, Auteur ; J. PIVEN, Auteur ; A. M. ESTES, Auteur ; Robert T. SCHULTZ, Auteur Article en page(s) : p.1236-1245 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder/diagnosis  Child, Preschool  Cohort Studies  Early Diagnosis  Humans  Phenotype  Siblings  Autism spectrum disorders  diagnosis  infancy  machine learning  stability  interest Index. décimale : PER Périodiques Résumé : BACKGROUND: Diagnostic shifts at early ages may provide invaluable insights into the nature of separation between autism spectrum disorder (ASD) and typical development. Recent conceptualizations of ASD suggest the condition is only fuzzily separated from non-ASD, with intermediate cases between the two. These intermediate cases may shift along a transition region over time, leading to apparent instability of diagnosis. METHODS: We used a cohort of children with high ASD risk, by virtue of having an older sibling with ASD, assessed at 24 months (N = 212) and 36 months (N = 191). We applied machine learning to empirically characterize the classification boundary between ASD and non-ASD, using variables quantifying developmental and adaptive skills. We computed the distance of children to the classification boundary. RESULTS: Children who switched diagnostic labels from 24 to 36 months, in both directions, (dynamic group) had intermediate phenotypic profiles. They were closer to the classification boundary compared to children who had stable diagnoses, both at 24 months (Cohen's d = .52) and at 36 months (d = .75). The magnitude of change in distance between the two time points was similar for the dynamic and stable groups (Cohen's d = .06), and diagnostic shifts were not associated with a large change. At the individual level, a few children in the dynamic group showed substantial change. CONCLUSIONS: Our results suggested that a diagnostic shift was largely due to a slight movement within a transition region between ASD and non-ASD. This fact highlights the need for more vigilant surveillance and intervention strategies. Young children with intermediate phenotypes may have an increased susceptibility to gain or lose their diagnosis at later ages, calling attention to the inherently dynamic nature of early ASD diagnoses. En ligne : http://dx.doi.org/10.1111/jcpp.13406 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456 [article] Diagnostic shifts in autism spectrum disorder can be linked to the fuzzy nature of the diagnostic boundary: a data-driven approach [Texte imprimé et/ou numérique] / B. TUNC, Auteur ; J. PANDEY, Auteur ; T. ST JOHN, Auteur ; S. S. MEERA, Auteur ; J. E. MALDARELLI, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; Heather C. HAZLETT, Auteur ; Stephen R. DAGER, Auteur ; Kelly N. BOTTERON, Auteur ; J. B. GIRAULT, Auteur ; R. C. MCKINSTRY, Auteur ; R. VERMA, Auteur ; J. T. ELISON, Auteur ; J. R. PRUETT, Auteur ; J. PIVEN, Auteur ; A. M. ESTES, Auteur ; Robert T. SCHULTZ, Auteur . - p.1236-1245. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 62-10 (October 2021) . - p.1236-1245 Mots-clés : Autism Spectrum Disorder/diagnosis  Child, Preschool  Cohort Studies  Early Diagnosis  Humans  Phenotype  Siblings  Autism spectrum disorders  diagnosis  infancy  machine learning  stability  interest Index. décimale : PER Périodiques Résumé : BACKGROUND: Diagnostic shifts at early ages may provide invaluable insights into the nature of separation between autism spectrum disorder (ASD) and typical development. Recent conceptualizations of ASD suggest the condition is only fuzzily separated from non-ASD, with intermediate cases between the two. These intermediate cases may shift along a transition region over time, leading to apparent instability of diagnosis. METHODS: We used a cohort of children with high ASD risk, by virtue of having an older sibling with ASD, assessed at 24 months (N = 212) and 36 months (N = 191). We applied machine learning to empirically characterize the classification boundary between ASD and non-ASD, using variables quantifying developmental and adaptive skills. We computed the distance of children to the classification boundary. RESULTS: Children who switched diagnostic labels from 24 to 36 months, in both directions, (dynamic group) had intermediate phenotypic profiles. They were closer to the classification boundary compared to children who had stable diagnoses, both at 24 months (Cohen's d = .52) and at 36 months (d = .75). The magnitude of change in distance between the two time points was similar for the dynamic and stable groups (Cohen's d = .06), and diagnostic shifts were not associated with a large change. At the individual level, a few children in the dynamic group showed substantial change. CONCLUSIONS: Our results suggested that a diagnostic shift was largely due to a slight movement within a transition region between ASD and non-ASD. This fact highlights the need for more vigilant surveillance and intervention strategies. Young children with intermediate phenotypes may have an increased susceptibility to gain or lose their diagnosis at later ages, calling attention to the inherently dynamic nature of early ASD diagnoses. En ligne : http://dx.doi.org/10.1111/jcpp.13406 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=456

Distributional Properties and Criterion Validity of a Shortened Version of the Social Responsiveness Scale: Results from the ECHO Program and Implications for Social Communication Research / K. LYALL in Journal of Autism and Developmental Disorders, 51-7 (July 2021)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 51-7 (July 2021) . - p.2241-2253 Titre : Distributional Properties and Criterion Validity of a Shortened Version of the Social Responsiveness Scale: Results from the ECHO Program and Implications for Social Communication Research Type de document : Texte imprimé et/ou numérique Auteurs : K. LYALL, Auteur ; M. HOSSEINI, Auteur ; Christine LADD-ACOSTA, Auteur ; X. NING, Auteur ; D. CATELLIER, Auteur ; John N. CONSTANTINO, Auteur ; Lisa A. CROEN, Auteur ; A. J. KAAT, Auteur ; Kelly N. BOTTERON, Auteur ; Nicole R. BUSH, Auteur ; Stephen R. DAGER, Auteur ; C. S. DUARTE, Auteur ; M. D. FALLIN, Auteur ; Heather C. HAZLETT, Auteur ; I. HERTZ-PICCIOTTO, Auteur ; R. M. JOSEPH, Auteur ; Margaret R. KARAGAS, Auteur ; S. KORRICK, Auteur ; R. LANDA, Auteur ; D. MESSINGER, Auteur ; E. OKEN, Auteur ; S. OZONOFF, Auteur ; J. PIVEN, Auteur ; J. PANDEY, Auteur ; Sheela SATHYANARAYA, Auteur ; Robert T. SCHULTZ, Auteur ; T. ST JOHN, Auteur ; R. SCHMIDT, Auteur ; Heather E. VOLK, Auteur ; C. J. NEWSCHAFFER, Auteur Article en page(s) : p.2241-2253 Langues : Anglais (eng) Mots-clés : Adolescent  Area Under Curve  Autism Spectrum Disorder/diagnosis  Child  Child, Preschool  Communication  Female  Humans  Male  Psychiatric Status Rating Scales/standards  Psychometrics  Reproducibility of Results  Social Behavior  Autism spectrum disorder  Quantitative traits  Social Responsiveness Scale  Social communication Index. décimale : PER Périodiques Résumé : Prior work proposed a shortened version of the Social Responsiveness Scale (SRS), a commonly used quantitative measure of social communication traits. We used data from 3031 participants (including 190 ASD cases) from the Environmental Influences on Child Health Outcomes (ECHO) Program to compare distributional properties and criterion validity of 16-item "short" to 65-item "full" SRS scores. Results demonstrated highly overlapping distributions of short and full scores. Both scores separated case from non-case individuals by approximately two standard deviations. ASD prediction was nearly identical for short and full scores (area under the curve values of 0.87, 0.86 respectively). Findings support comparability of shortened and full scores, suggesting opportunities to increase efficiency. Future work should confirm additional psychometric properties of short scores. En ligne : http://dx.doi.org/10.1007/s10803-020-04667-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=452 [article] Distributional Properties and Criterion Validity of a Shortened Version of the Social Responsiveness Scale: Results from the ECHO Program and Implications for Social Communication Research [Texte imprimé et/ou numérique] / K. LYALL, Auteur ; M. HOSSEINI, Auteur ; Christine LADD-ACOSTA, Auteur ; X. NING, Auteur ; D. CATELLIER, Auteur ; John N. CONSTANTINO, Auteur ; Lisa A. CROEN, Auteur ; A. J. KAAT, Auteur ; Kelly N. BOTTERON, Auteur ; Nicole R. BUSH, Auteur ; Stephen R. DAGER, Auteur ; C. S. DUARTE, Auteur ; M. D. FALLIN, Auteur ; Heather C. HAZLETT, Auteur ; I. HERTZ-PICCIOTTO, Auteur ; R. M. JOSEPH, Auteur ; Margaret R. KARAGAS, Auteur ; S. KORRICK, Auteur ; R. LANDA, Auteur ; D. MESSINGER, Auteur ; E. OKEN, Auteur ; S. OZONOFF, Auteur ; J. PIVEN, Auteur ; J. PANDEY, Auteur ; Sheela SATHYANARAYA, Auteur ; Robert T. SCHULTZ, Auteur ; T. ST JOHN, Auteur ; R. SCHMIDT, Auteur ; Heather E. VOLK, Auteur ; C. J. NEWSCHAFFER, Auteur . - p.2241-2253. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 51-7 (July 2021) . - p.2241-2253 Mots-clés : Adolescent  Area Under Curve  Autism Spectrum Disorder/diagnosis  Child  Child, Preschool  Communication  Female  Humans  Male  Psychiatric Status Rating Scales/standards  Psychometrics  Reproducibility of Results  Social Behavior  Autism spectrum disorder  Quantitative traits  Social Responsiveness Scale  Social communication Index. décimale : PER Périodiques Résumé : Prior work proposed a shortened version of the Social Responsiveness Scale (SRS), a commonly used quantitative measure of social communication traits. We used data from 3031 participants (including 190 ASD cases) from the Environmental Influences on Child Health Outcomes (ECHO) Program to compare distributional properties and criterion validity of 16-item "short" to 65-item "full" SRS scores. Results demonstrated highly overlapping distributions of short and full scores. Both scores separated case from non-case individuals by approximately two standard deviations. ASD prediction was nearly identical for short and full scores (area under the curve values of 0.87, 0.86 respectively). Findings support comparability of shortened and full scores, suggesting opportunities to increase efficiency. Future work should confirm additional psychometric properties of short scores. En ligne : http://dx.doi.org/10.1007/s10803-020-04667-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=452

Early language exposure supports later language skills in infants with and without autism / M. R. SWANSON in Autism Research, 12-12 (December)  

Public ISBD [article]  inAutism Research > 12-12 (December) . - p.1784-1795 Titre : Early language exposure supports later language skills in infants with and without autism Type de document : Texte imprimé et/ou numérique Auteurs : M. R. SWANSON, Auteur ; K. DONOVAN, Auteur ; S. PATERSON, Auteur ; J. J. WOLFF, Auteur ; Julia PARISH-MORRIS, Auteur ; S. S. MEERA, Auteur ; Linda R. WATSON, Auteur ; A. M. ESTES, Auteur ; N. MARRUS, Auteur ; J. T. ELISON, Auteur ; M. D. SHEN, Auteur ; H. B. MCNEILLY, Auteur ; L. MACINTYRE, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; T. ST JOHN, Auteur ; Kelly N. BOTTERON, Auteur ; Stephen R. DAGER, Auteur ; J. PIVEN, Auteur Année de publication : 2019 Article en page(s) : p.1784-1795 Langues : Anglais (eng) Mots-clés : Asd  caregiver speech  high familial risk  home language environment  infancy  language  socioeconomic status Index. décimale : PER Périodiques Résumé : The way that parents communicate with their typically developing infants is associated with later infant language development. Here we aim to show that these associations are observed in infants subsequently diagnosed with autism spectrum disorder (ASD). This study had three groups: high-familial-risk infants who did not have ASD (n = 46); high-familial-risk infants who had ASD (n = 14); and low-familial-risk infants who exhibited typical development (n = 36). All-day home language recordings were collected at 9 and 15 months, and language skills were assessed at 24 months. Across all infants in the study, including those with ASD, a richer home language environment (e.g., hearing more adult words and experiencing more conversational turns) at 9 and 15 months was associated with better language skills. Higher parental educational attainment was associated with a richer home language environment. Mediation analyses showed that the effect of education on child language skills was explained by the richness of the home language environment. Exploratory analyses revealed that typically developing infants experience an increase in caregiver-child conversational turns across 9-15 months, a pattern not seen in children with ASD. The current study shows that parent behavior during the earliest stages of life can have a significant impact on later development, highlighting the home language environment as means to support development in infants with ASD. Autism Res 2019, 12: 1784-1795. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: It has long been understood that caregiver speech supports language skills in typically developing infants. In this study, parents of infants who were later diagnosed with ASD and parents of infants in the control groups completed all-day home language recordings. We found that for all infants in our study, those who heard more caregiver speech had better language skills later in life. Parental education level was also related to how much caregiver speech an infant experienced. En ligne : http://dx.doi.org/10.1002/aur.2163 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=413 [article] Early language exposure supports later language skills in infants with and without autism [Texte imprimé et/ou numérique] / M. R. SWANSON, Auteur ; K. DONOVAN, Auteur ; S. PATERSON, Auteur ; J. J. WOLFF, Auteur ; Julia PARISH-MORRIS, Auteur ; S. S. MEERA, Auteur ; Linda R. WATSON, Auteur ; A. M. ESTES, Auteur ; N. MARRUS, Auteur ; J. T. ELISON, Auteur ; M. D. SHEN, Auteur ; H. B. MCNEILLY, Auteur ; L. MACINTYRE, Auteur ; Lonnie ZWAIGENBAUM, Auteur ; T. ST JOHN, Auteur ; Kelly N. BOTTERON, Auteur ; Stephen R. DAGER, Auteur ; J. PIVEN, Auteur . - 2019 . - p.1784-1795. Langues : Anglais (eng) in Autism Research > 12-12 (December) . - p.1784-1795 Mots-clés : Asd  caregiver speech  high familial risk  home language environment  infancy  language  socioeconomic status Index. décimale : PER Périodiques Résumé : The way that parents communicate with their typically developing infants is associated with later infant language development. Here we aim to show that these associations are observed in infants subsequently diagnosed with autism spectrum disorder (ASD). This study had three groups: high-familial-risk infants who did not have ASD (n = 46); high-familial-risk infants who had ASD (n = 14); and low-familial-risk infants who exhibited typical development (n = 36). All-day home language recordings were collected at 9 and 15 months, and language skills were assessed at 24 months. Across all infants in the study, including those with ASD, a richer home language environment (e.g., hearing more adult words and experiencing more conversational turns) at 9 and 15 months was associated with better language skills. Higher parental educational attainment was associated with a richer home language environment. Mediation analyses showed that the effect of education on child language skills was explained by the richness of the home language environment. Exploratory analyses revealed that typically developing infants experience an increase in caregiver-child conversational turns across 9-15 months, a pattern not seen in children with ASD. The current study shows that parent behavior during the earliest stages of life can have a significant impact on later development, highlighting the home language environment as means to support development in infants with ASD. Autism Res 2019, 12: 1784-1795. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: It has long been understood that caregiver speech supports language skills in typically developing infants. In this study, parents of infants who were later diagnosed with ASD and parents of infants in the control groups completed all-day home language recordings. We found that for all infants in our study, those who heard more caregiver speech had better language skills later in life. Parental education level was also related to how much caregiver speech an infant experienced. En ligne : http://dx.doi.org/10.1002/aur.2163 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=413

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