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Direct linkGeorgiades, 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
McVey, Alana J.; Liu, Quinn; Bedford, Saashi A.; Zaidman-Zait, Anat; Szatmari, Peter; Smith, Isabel M.; Vaillancourt, Tracy; Zwaigenbaum, Lonnie; Bennett, Teresa; Duku, Eric; Elsabbagh, Mayada; Georgiades, Stelios; Kerns, Connor M. – Autism: The International Journal of Research and Practice, 2023
Research regarding autistic children's sibling relationship quality is mixed, although some literature suggests poorer quality compared to children with other disabilities or who are neurotypical. Little is known about how the clinical characteristics of autistic children relate to parent perceptions of sibling relationship quality. We drew data…
Descriptors: Autism Spectrum Disorders, Parent Attitudes, Sibling Relationship, Children
Lee, Vivian; Duku, Eric; Zwaigenbaum, Lonnie; Bennett, Teresa; Szatmari, Peter; Elsabbagh, Mayada; Kerns, Connor; Mirenda, Pat; Smith, Isabel M.; Ungar, Wendy J.; Vaillancourt, Tracy; Volden, Joanne; Waddell, Charlotte; Zaidman-Zait, Anat; Thompson, Ann; Georgiades, Stelios – Autism: The International Journal of Research and Practice, 2020
Temperament is a construct that is relatively stable over time but varies between individuals. Research suggests that children with autism spectrum disorder have a 'reactive' temperament profile when compared to peers with or without disabilities. However, our understanding of how temperament varies within children with autism and how it relates…
Descriptors: Personality Traits, Severity (of Disability), Symptoms (Individual Disorders), Behavior Problems
Volden, Joanne; Dodd, Erin; Engel, Kathleen; Smith, Isabel M.; Szatmari, Peter; Fombonne, Eric; Zwaigenbaum, Lonnie; Mirenda, Pat; Bryson, Susan; Roberts, Wendy; Vaillancourt, Tracy; Waddell, Charlotte; Elsabbagh, Mayada; Bennett, Teresa; Georgiades, Stelios; Duku, Eric – Journal of Speech, Language, and Hearing Research, 2017
Purpose: Impairments in the social use of language are universal in autism spectrum disorder (ASD), but few standardized measures evaluate communication skills above the level of individual words or sentences. This study evaluated the Expression, Reception, and Recall of Narrative Instrument (ERRNI; Bishop, 2004) to determine its contribution to…
Descriptors: Autism, Pervasive Developmental Disorders, Communication Skills, Expressive Language
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
Di Rezze, Briano; Rosenbaum, Peter; Zwaigenbaum, Lonnie – Focus on Autism and Other Developmental Disabilities, 2012
Service providers and researchers in autism spectrum disorders (ASD) are challenged to categorize clinical variation in function. Classification systems for children with cerebral palsy have enabled clinicians and families to describe levels of function. A web-based survey engaged international ASD stakeholders to advise on considerations of…
Descriptors: Autism, Cerebral Palsy, Preschool Children, Classification
Beyond Autism: A Baby Siblings Research Consortium Study of High-Risk Children at Three Years of Age
Messinger, Daniel; Young, Gregory S.; Ozonoff, Sally; Dobkins, Karen; Carter, Alice; Zwaigenbaum, Lonnie; Landa, Rebecca J.; Charman, Tony; Stone, Wendy L.; Constantino, John N.; Hutman, Ted; Carver, Leslie J.; Bryson, Susan; Iverson, Jana M.; Strauss, Mark S.; Rogers, Sally J.; Sigman, Marian – Journal of the American Academy of Child & Adolescent Psychiatry, 2013
Objective: First-degree relatives of persons with an autism spectrum disorder (ASD) are at increased risk for ASD-related characteristics. As little is known about the early expression of these characteristics, this study characterizes the non-ASD outcomes of 3-year-old high-risk (HR) siblings of children with ASD. Method: Two groups of children…
Descriptors: Outcome Measures, Autism, Early Intervention, Siblings
Georgiades, Stelios; Szatmari, Peter; Boyle, Michael; Hanna, Steven; Duku, Eric; Zwaigenbaum, Lonnie; Bryson, Susan; Fombonne, Eric; Volden, Joanne; Mirenda, Pat; Smith, Isabel; Roberts, Wendy; Vaillancourt, Tracy; Waddell, Charlotte; Bennett, Teresa; Thompson, Ann – Journal of Child Psychology and Psychiatry, 2013
Background: Autism spectrum disorder (ASD) is characterized by notable phenotypic heterogeneity, which is often viewed as an obstacle to the study of its etiology, diagnosis, treatment, and prognosis. On the basis of empirical evidence, instead of three binary categories, the upcoming edition of the DSM 5 will use two dimensions--social…
Descriptors: Pervasive Developmental Disorders, Autism, Student Characteristics, Social Development
Szatmari, Peter; Georgiades, Stelios; Duku, Eric; Zwaigenbaum, Lonnie; Goldberg, Jeremy; Bennett, Terry – Journal of Autism and Developmental Disorders, 2008
Given the recent findings regarding the association between alexithymia and Autism Spectrum Disorder (ASD) and the accumulating evidence for the presence of the Broader Autism Phenotype (BAP) in relatives of individuals with ASD, we further explored the construct of alexithymia in parents of children with ASD as a potential part of the BAP. We…
Descriptors: Control Groups, Autism, Parents, Psychometrics
Georgiades, Stelios; Szatmari, Peter; Zwaigenbaum, Lonnie; Duku, Eric; Bryson, Susan; Roberts, Wendy; Goldberg, Jeremy; Mahoney, William – Journal of the American Academy of Child and Adolescent Psychiatry, 2007
Background: The main objective of this study was to develop a comprehensive, empirical model that would allow the reorganization of the structure of the pervasive developmental disorder symptom phenotype through factor analysis into more homogeneous dimensions. Method: The sample consisted of 209 children with pervasive developmental disorder…
Descriptors: Siblings, Factor Analysis, Correlation, Autism
