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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
Nicholas, David B.; Zwaigenbaum, Lonnie; Zwicker, Jennifer; Clarke, Margaret E.; Lamsal, Ramesh; Stoddart, Kevin P.; Carroll, Cynthia; Muskat, Barbara; Spoelstra, Margaret; Lowe, Katelyn – Autism: The International Journal of Research and Practice, 2018
The employment rate among persons with autism spectrum disorder has been noted as unacceptably low. Employment-support services are increasingly linked to the potential for favorable job outcomes, yet little is known about employment-support practices and the outcome of these interventions. This mixed-methods study examined employment-support…
Descriptors: Adults, Pervasive Developmental Disorders, Autism, Supported Employment
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
Tesfaye, Rackeb; Courchesne, Valerie; Yusuf, Afiqah; Savion-Lemieux, Tal; Singh, Ilina; Shikako-Thomas, Keiko; Mirenda, Pat; Waddell, Charlotte; Smith, Isabel M.; Nicholas, David; Szatmari, Peter; Bennett, Terry; Duku, Eric; Georgiades, Stelios; Kerns, Connor; Vaillancourt, Tracy; Zaidman-Zait, Anat; Zwaigenbaum, Lonnie; Elsabbagh, Mayada – Autism: The International Journal of Research and Practice, 2019
Most research regarding youth with autism spectrum disorder has not focused on their first-person perspectives providing limited insight into methodologies best suited to eliciting their voices. We conducted a synthesis of methods previously used to obtain the first-person perspectives of youth with various disabilities, which may be applicable to…
Descriptors: Autism, Pervasive Developmental Disorders, Youth, Disabilities
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
Bölte, Sven; Mahdi, Soheil; de Vries, Petrus J.; Granlund, Mats; Robison, John E.; Shulman, Cory; Swedo, Susan; Tonge, Bruce; Wong, Virginia; Zwaigenbaum, Lonnie; Segerer, Wolfgang; Selb, Melissa – Autism: The International Journal of Research and Practice, 2019
Autism spectrum disorder is associated with diverse social, educational, and occupational challenges. To date, no standardized, internationally accepted tools exist to assess autism spectrum disorder-related functioning. World Health Organization's International Classification of Functioning, Disability and Health can serve as foundation for…
Descriptors: Psychotherapy, Autism, Pervasive Developmental Disorders, Disabilities
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
Mahdi, Soheil; Albertowski, Katja; Almodayfer, Omar; Arsenopoulou, Vaia; Carucci, Sara; Dias, José Carlos; Khalil, Mohammad; Knüppel, Ane; Langmann, Anika; Lauritsen, Marlene Briciet; da Cunha, Graccielle Rodrigues; Uchiyama, Tokio; Wolff, Nicole; Selb, Melissa; Granlund, Mats; de Vries, Petrus J.; Zwaigenbaum, Lonnie; Bölte, Sven – Journal of Autism and Developmental Disorders, 2018
This is the fourth international preparatory study designed to develop International Classification of Functioning, Disability and Health (ICF, and Children and Youth version, ICF-CY) Core Sets for Autism Spectrum Disorder (ASD). Examine functioning of individuals diagnosed with ASD as documented by the ICF-CY in a variety of clinical settings. A…
Descriptors: Disabilities, Pervasive Developmental Disorders, Autism, Models
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
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
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
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
Sacrey, Lori-Ann R.; Bryson, Susan; Zwaigenbaum, Lonnie; Brian, Jessica; Smith, Isabel M.; Roberts, Wendy; Szatmari, Peter; Vaillancourt, Tracy; Roncadin, Caroline; Garon, Nancy – Autism: The International Journal of Research and Practice, 2018
This study examined whether a novel parent-report questionnaire, the Autism Parent Screen for Infants, could differentiate infants subsequently diagnosed with autism spectrum disorder from a high-risk cohort (siblings of children diagnosed with autism spectrum disorder (n = 66)) from high-risk and low-risk comparison infants (no family history of…
Descriptors: Autism, Infants, Pervasive Developmental Disorders, Parents
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
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