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Beauchamp, Myriam L. H.; Rezzonico, Stefano; Bennett, Terry; Duku, Eric; Georgiades, Stelios; Kerns, Connor; Mirenda, Pat; Richard, Annie; Smith, Isabel M.; Szatmari, Peter; Vaillancourt, Tracy; Waddell, Charlotte; Zaidman-Zait, Anat; Zwaigenbaum, Lonnie; Elsabbagh, Mayada – Journal of Autism and Developmental Disorders, 2023
We examined the narrative abilities of bilingual and monolingual children on the autism spectrum (AS), whether bilinguals presented stronger social and pragmatic language abilities compared to monolinguals, and the link between narrative, social, and pragmatic language abilities. The narrative, social, and pragmatic language skills of school-aged…
Descriptors: Bilingualism, Monolingualism, Language Skills, Children
Georgiades, Stelios; Tait, Peter A.; McNicholas, Paul D.; Duku, Eric; Zwaigenbaum, Lonnie; Smith, Isabel M.; Bennett, Teresa; Elsabbagh, Mayada; Kerns, Connor M.; Mirenda, Pat; Ungar, Wendy J.; Vaillancourt, Tracy; Volden, Joanne; Waddell, Charlotte; Zaidman-Zait, Anat; Gentles, Stephen; Szatmari, Peter – Journal of Autism and Developmental Disorders, 2022
This study examined the trajectories of autistic symptom severity in an inception cohort of 187 children with ASD assessed across four time points from diagnosis to age 10. Trajectory groups were derived using multivariate cluster analysis. A two trajectory/cluster solution was selected. Change in trajectory slopes revealed a "turning…
Descriptors: Symptoms (Individual Disorders), Severity (of Disability), Children, Autism
Cost, Katherine T.; Zaidman-Zait, Anat; Mirenda, Pat; Duku, Eric; Zwaigenbaum, Lonnie; Smith, Isabel M.; Ungar, Wendy J.; Kerns, Connor; Bennett, Theresa; Szatmari, Peter; Georgiades, Stelios; Waddell, Charlotte; Elsabbagh, Mayada; Vaillancourt, Tracy – Journal of Autism and Developmental Disorders, 2021
This study examined parental perceptions of the character traits of children with autism from early childhood to age 11. Parents (n = 153) provided descriptions of the "best things" about their children on the Child Behavior Checklist (CBCL) at ages 3-4, 7-8, and 10-11 years. Descriptions were coded using the framework of the Values in…
Descriptors: Parent Attitudes, Autism, Pervasive Developmental Disorders, Personality Traits
Sacrey, Lori-Ann R.; Zwaigenbaum, Lonnie; Bryson, Susan; Brian, Jessica; Smith, Isabel M.; Roberts, Wendy; Szatmari, Peter; Vaillancourt, Tracy; Roncadin, Caroline; Garon, Nancy – Journal of Autism and Developmental Disorders, 2021
Despite considerable progress in characterizing the early signs of autism spectrum disorder (ASD), more remains to be learned about how symptoms emerge in the first year of life. Parents with a new baby who already had at least one biological child diagnosed with ASD (high-risk) or no family history of ASD (low-risk) completed two measures when…
Descriptors: Siblings, Screening Tests, Autism, Pervasive Developmental Disorders
Hunsche, Michelle C.; Saqui, Sonja; Mirenda, Pat; Zaidman-Zait, Anat; Bennett, Teresa; Duku, Eric; Elsabbagh, Mayada; Georgiades, Stelios; Smith, Isabel M.; Szatmari, Peter; Ungar, Wendy J.; Vaillancourt, Tracy; Waddell, Charlotte; Zwaigenbaum, Lonnie; Kerns, Connor M. – Journal of Autism and Developmental Disorders, 2020
This study investigated rates of suicidal ideation (SI) and suicidal and/or self-injurious behaviour (SSIB) reported by parents on the Child Behavior Checklist for 178 children with ASD over four annual assessments (ages 7-11 years). Analyses examined the frequency and persistence of SI and SSIB, and the association of SI and SSIB at any time…
Descriptors: Suicide, Self Destructive Behavior, Children, Check Lists
Raza, Sarah; Sacrey, Lori-Ann R.; Zwaigenbaum, Lonnie; Bryson, Susan; Brian, Jessica; Smith, Isabel M.; Roberts, Wendy; Szatmari, Peter; Vaillancourt, Tracy; Roncadin, Caroline; Garon, Nancy – Journal of Autism and Developmental Disorders, 2020
Social-emotional behavior in autism spectrum disorder (ASD) was examined among high-risk (HR; siblings of children diagnosed with ASD) and low-risk (LR; no family history of ASD) toddlers. Caregivers completed the Infant-Toddler Social Emotional Assessment (ITSEA) at 18 months, and blind diagnostic assessment for ASD was conducted at 36 months.…
Descriptors: Autism, Pervasive Developmental Disorders, Genetics, Clinical Diagnosis
Raza, Sarah; Zwaigenbaum, Lonnie; Sacrey, Lori-Ann R.; Bryson, Susan; Brian, Jessica; Smith, Isabel M.; Reid, Kyle; Roberts, Wendy; Szatmari, Peter; Vaillancourt, Tracy; Roncadin, Caroline; Garon, Nancy – Journal of Autism and Developmental Disorders, 2019
This study examined the potential of the short form of the Quantitative Checklist for Autism in Toddlers (Q-CHAT-10) to identify autism spectrum disorder (ASD) in a high-risk sibling cohort. High-risk (HR; siblings of children diagnosed with ASD) and low-risk (LR; no family history of ASD) toddlers were assessed prospectively at 18 and 24 months…
Descriptors: Autism, Pervasive Developmental Disorders, Toddlers, At Risk Persons
Conlon, Olivia; Volden, Joanne; Smith, Isabel M.; Duku, Eric; Zwaigenbaum, Lonnie; Waddell, Charlotte; Szatmari, Peter; Mirenda, Pat; Vaillancourt, Tracy; Bennett, Teresa; Georgiades, Stelios; Elsabbagh, Mayada; Ungar, Wendy. J. – Journal of Autism and Developmental Disorders, 2019
Possible gender differences in manifestations of autism spectrum disorder (ASD) were examined using data on production of narratives. The Expression, Reception and Recall of Narrative Instrument (ERRNI; Bishop, Expression, Reception and Recall of Narrative Instrument, Harcourt assessment, London, 2004) was administered to a sample of matched…
Descriptors: Gender Differences, Pragmatics, Autism, Pervasive Developmental Disorders
Zaidman-Zait, Anat; Mirenda, Pat; Szatmari, Peter; Duku, Eric; Smith, Isabel M.; Vaillancourt, Tracy; Volden, Joanne; Waddell, Charlotte; Bennett, Teresa; Zwaigenbaum, Lonnie; Elsabaggh, Mayada; Georgiades, Stelios – Journal of Autism and Developmental Disorders, 2018
This study described empirically derived profiles of parents' personal and social coping resources in a sample of 207 families of children diagnosed with autism spectrum disorder. Latent Profile Analysis identified four family profiles based on socieoeconomic risk, coping strategy utilization, family functioning, available social supports, and…
Descriptors: Coping, Pervasive Developmental Disorders, Autism, Behavior Problems
Jitlina, Katia; Zumbo, Bruno; Mirenda, Pat; Ford, Laurie; Bennett, Teresa; Georgiades, Stelios; Waddell, Charlotte; Smith, Isabel M.; Volden, Joanne; Duku, Eric; Zwaigenbaum, Lonnie; Szatmari, Peter; Vaillancourt, Tracy; Elsabbagh, Mayada – Journal of Autism and Developmental Disorders, 2017
Although anxiety is frequently reported in children with autism spectrum disorder (ASD), existing anxiety scales are often psychometrically inappropriate for this population. This study examined the internal structure, reliability, convergent and discriminant validity of the Spence Children's Anxiety Scale-Parent Report (SCAS-P; Spence 1999) in…
Descriptors: Autism, Pervasive Developmental Disorders, Psychometrics, Children
Sacrey, Lori-Ann R.; Zwaigenbaum, Lonnie; Szatmari, Peter; Bryson, Susan; Georgiades, Stelios; Brian, Jessica; Smith, Isabel M.; Vaillancourt, Tracy; Garon, Nancy; Roncadin, Caroline; Elsabbagh, Mayada – Journal of Autism and Developmental Disorders, 2017
Prospective studies of infant siblings of children diagnosed with autism spectrum disorder (ASD) provide a unique opportunity to characterize ASD as it unfolds. A critical question that remains unanswered is whether and how these children with ASD resemble other children identified from the community, including those with no family history. The…
Descriptors: Autism, Pervasive Developmental Disorders, Preschool Children, Symptoms (Individual Disorders)
Flanagan, Helen E.; Smith, Isabel M.; Vaillancourt, Tracy; Duku, Eric; Szatmari, Peter; Bryson, Susan; Fombonne, Eric; Mirenda, Pat; Roberts, Wendy; Volden, Joanne; Waddell, Charlotte; Zwaigenbaum, Lonnie; Bennett, Teresa; Elsabbagh, Mayada; Georgiades, Stelios – Journal of Autism and Developmental Disorders, 2015
We examined the stability of cognitive and adaptive behaviour standard scores in children with autism spectrum disorder (ASD) between diagnosis and school entry approximately age 6. IQ increased 18 points in 2-year-olds, 12 points in 3-year-olds, and 9 points in 4-year-olds (N = 281). Adaptive behaviour scores increased 4 points across age groups…
Descriptors: Autism, Pervasive Developmental Disorders, Preschool Children, Mental Retardation
Zaidman-Zait, Anat; Mirenda, Pat; Duku, Eric; Szatmari, Peter; Georgiades, Stelios; Volden, Joanne; Zwaigenbaum, Lonnie; Vaillancourt, Tracy; Bryson, Susan; Smith, Isabel; Fombonne, Eric; Roberts, Wendy; Waddell, Charlotte; Thompson, Ann – Journal of Autism and Developmental Disorders, 2014
Path analysis within a structural equation modeling framework was employed to examine the relationships between two types of parent stress and children's externalizing and internalizing behaviors over a 4-year period, in a sample of 184 mothers of young children with autism spectrum disorder. Parent stress was measured with the Parenting Stress…
Descriptors: Path Analysis, Structural Equation Models, Stress Variables, Child Rearing
Germani, Tamara; Zwaigenbaum, Lonnie; Bryson, Susan; Brian, Jessica; Smith, Isabel; Roberts, Wendy; Szatmari, Peter; Roncadin, Caroline; Sacrey, Lori Ann R.; Garon, Nancy; Vaillancourt, Tracy – Journal of Autism and Developmental Disorders, 2014
This study assessed sensory processing differences between 24-month infants at high-risk of autism spectrum disorder (ASD), each with an older sibling with ASD, and low-risk infants with no family history of ASD. Sensory processing differences were assessed using the Infant/Toddler Sensory Profile, a parent-reported measure. Groups were compared…
Descriptors: Pervasive Developmental Disorders, Autism, Siblings, Infants
Georgiades, Stelios; Boyle, Michael; Szatmari, Peter; Hanna, Steven; Duku, Eric; Zwaigenbaum, Lonnie; Bryson, Susan; Fombonne, Eric; Volden, Joanne; Mirenda, Pat; Smith, Isabel; Roberts, Wendy; Vaillancourt, Tracy; Waddell, Charlotte; Bennett, Teresa; Elsabbagh, Mayada; Thompson, Ann – Journal of Autism and Developmental Disorders, 2014
The latent class structure of autism symptoms from the time of diagnosis to age 6 years was examined in a sample of 280 children with autism spectrum disorder. Factor mixture modeling was performed on 26 algorithm items from the Autism Diagnostic Interview-Revised at diagnosis (Time 1) and again at age 6 (Time 2). At Time 1, a…
Descriptors: Autism, Pervasive Developmental Disorders, Symptoms (Individual Disorders), Children
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