Imitation From 12 to 24 Months in Autism and Typical Development: A Longitudinal Rasch Analysis

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 do...

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Veröffentlicht in:Developmental psychology 2011-11, Vol.47 (6), p.1565-1578
Hauptverfasser: Young, Gregory S., Rogers, Sally J., Hutman, Ted, Rozga, Agata, Sigman, Marian, Ozonoff, Sally
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container_end_page 1578
container_issue 6
container_start_page 1565
container_title Developmental psychology
container_volume 47
creator Young, Gregory S.
Rogers, Sally J.
Hutman, Ted
Rozga, Agata
Sigman, Marian
Ozonoff, Sally
description 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.
doi_str_mv 10.1037/a0025418
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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. 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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.</abstract><cop>Washington, DC</cop><pub>American Psychological Association</pub><pmid>21910524</pmid><doi>10.1037/a0025418</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record>
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subjects At Risk Persons
Autism
Autism Diagnostic Observation Schedule
Autism Spectrum Disorders
Autistic Disorder - psychology
Autistic spectrum disorders
Biological and medical sciences
California
Child clinical studies
Child Development
Child, Preschool
Cognitive development
Cognitive psychology
Comparative Analysis
Cultural imitation
Developmental Delays
Developmental Disabilities
Developmental disorders
Expressive Language
Female
Human
Humans
Imitation
Imitation (Learning)
Imitative Behavior - physiology
Infant
Infant Development
Infantile autism
Infants
Interaction
Interpersonal Relationship
Item Response Theory
Language Acquisition
Learning
Linear Models
Linear Regression
Longitudinal Studies
MacArthur Communicative Development Inventory
Male
Mathematical models
Medical sciences
Model testing
Motor Development
Mullen Scales of Early Learning
Neuropsychological Tests
Pervasive Developmental Disorders
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Questionnaires
Rasch model
Rasch Scaled Scores
Receptive Language
Social development
Social interaction
Social Learning
Socialization
Time Factors
Toddlers
Young Children
title Imitation From 12 to 24 Months in Autism and Typical Development: A Longitudinal Rasch Analysis
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