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Stelios Georgiades
Researcher at McMaster University
Publications - 137
Citations - 4669
Stelios Georgiades is an academic researcher from McMaster University. The author has contributed to research in topics: Autism & Autism spectrum disorder. The author has an hindex of 32, co-authored 103 publications receiving 3514 citations. Previous affiliations of Stelios Georgiades include Hamilton Health Sciences & McMaster-Carr.
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Journal ArticleDOI
Investigating the structure of the restricted, repetitive behaviours and interests domain of autism.
Peter Szatmari,Stelios Georgiades,Susan E. Bryson,Lonnie Zwaigenbaum,Wendy Roberts,William M. Mahoney,Jeremy Goldberg,Lawrence Tuff +7 more
TL;DR: Evidence is provided for the heterogeneity of the RRBI domain of the ADI-R in terms of both clinical presentation and other correlates, which seems to be under familial (presumably genetic) control, while RSMB appears to simply reflect variation in developmental level.
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Behavioral and Cognitive Characteristics of Females and Males With Autism in the Simons Simplex Collection
TL;DR: A specific female ASD phenotype is emerging that cannot be accounted for by differential symptom measurement, suggesting that the relatively low proportion of high-functioning females may reflect the effect of protective biological factors or may be due to under-identification.
Journal ArticleDOI
Developmental Trajectories of Symptom Severity and Adaptive Functioning in an Inception Cohort of Preschool Children With Autism Spectrum Disorder
Peter Szatmari,Stelios Georgiades,Eric Duku,Teresa Bennett,Susan E. Bryson,Eric Fombonne,Pat Mirenda,Wendy Roberts,Isabel M. Smith,Tracy Vaillancourt,Joanne Volden,Charlotte Waddell,Lonnie Zwaigenbaum,Mayada Elsabbagh,Ann Thompson +14 more
TL;DR: Findings confirm the heterogeneous nature of developmental trajectories in ASD and it is imperative that a flexible suite of interventions that target both autistic symptom severity and adaptive functioning should be implemented and tailored to each child's strengths and difficulties.
Journal ArticleDOI
Investigating Phenotypic Heterogeneity in Children with Autism Spectrum Disorder: A Factor Mixture Modeling Approach.
Stelios Georgiades,Peter Szatmari,Michael H. Boyle,Steven E. Hanna,Eric Duku,Lonnie Zwaigenbaum,Susan E. Bryson,Eric Fombonne,Joanne Volden,Pat Mirenda,Isabel M. Smith,Wendy Roberts,Tracy Vaillancourt,Charlotte Waddell,Teresa Bennett,Ann Thompson +15 more
TL;DR: In this paper, the authors used empirical data on the SCD and FIRB dimensions to stratify children with ASD into more homogeneous subgroups using Factor Mixture Modeling (FMM).
Journal ArticleDOI
Prospective Longitudinal Studies of Infant Siblings of Children With Autism: Lessons Learned and Future Directions
Peter Szatmari,Katarzyna Chawarska,Geraldine Dawson,Stelios Georgiades,Rebecca Landa,Catherine Lord,Daniel S. Messinger,Audrey Thurm,Alycia K. Halladay +8 more
TL;DR: The HR design has yielded an understanding that ASD often, but not always, begins to emerge between 6 and 18 months, with early signs affecting social communication, and the potential of this design to improve long-term outcomes of all children with ASD is substantial.