Document Detail

Imitation from 12 to 24 months in autism and typical development: a longitudinal Rasch analysis.
MedLine Citation:
PMID:  21910524     Owner:  NLM     Status:  MEDLINE    
The development of imitation during the second year of life plays an important role in domains of sociocognitive development such as language and social learning. Deficits in imitation ability in persons with autism spectrum disorder (ASD) from toddlerhood into adulthood have also been repeatedly documented, raising the possibility that early disruptions in imitation contribute to the onset of ASD and the deficits in language and social interaction that define the disorder. This study prospectively examined the development of imitation between 12 and 24 months of age in 154 infants at familial risk for ASD and 78 typically developing infants who were all later assessed at 36 months for ASD or other developmental delays. The study established a developmental measure of imitation ability and examined group differences over time, using an analytic Rasch measurement model. Results revealed a unidimensional latent construct of imitation and verified a reliable sequence of imitation skills that was invariant over time for all outcome groups. Results also showed that all groups displayed similar significant linear increases in imitation ability between 12 and 24 months and that these increases were related to individual growth in both expressive language and ratings of social engagement but not in fine motor development. The group of children who developed ASD by age 3 years exhibited delayed imitation development compared with the low-risk typical outcome group across all time-points, but were indistinguishable from other high-risk infants who showed other cognitive delays not related to ASD.
Gregory S Young; Sally J Rogers; Ted Hutman; Agata Rozga; Marian Sigman; Sally Ozonoff
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Publication Detail:
Type:  Journal Article; Multicenter Study; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2011-09-12
Journal Detail:
Title:  Developmental psychology     Volume:  47     ISSN:  1939-0599     ISO Abbreviation:  Dev Psychol     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-08     Completed Date:  2012-03-12     Revised Date:  2013-07-18    
Medline Journal Info:
Nlm Unique ID:  0260564     Medline TA:  Dev Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1565-78     Citation Subset:  IM    
Medical Investigation of Neurodevelopmental Disorders (M.I.N.D.) Institute, Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, CA 95817, USA.
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MeSH Terms
Autistic Disorder / psychology*
Child, Preschool
Developmental Disabilities*
Imitative Behavior / physiology*
Linear Models
Longitudinal Studies
Neuropsychological Tests
Time Factors
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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