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Related Experiment Videos

Development of low- and high-functioning autistic children.

J A Burack1, F R Volkmar

  • 1McGill University, Montréal, Québec, Canada.

Journal of Child Psychology and Psychiatry, and Allied Disciplines
|March 1, 1992
PubMed
Summary
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Autistic children, particularly those with lower functioning, show more developmental regressions and unevenness compared to non-autistic peers. Developmental sequences were largely similar across groups.

Area of Science:

  • Developmental Psychology
  • Neurodevelopmental Disorders
  • Child Psychiatry

Background:

  • Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
  • Understanding developmental trajectories in autistic children is crucial for diagnosis and intervention.
  • Previous research has explored developmental patterns, but specific comparisons of sequences, regressions, and profiles between functioning levels of autism are less defined.

Purpose of the Study:

  • To compare developmental sequences, regressions, and profiles in low- and high-functioning autistic children versus non-autistic developmentally disabled children.
  • To investigate the impact of functioning level (IQ ≥ 50) on developmental peculiarities in autism.

Main Methods:

  • Assessment of developmental sequences and structures in three groups: low-functioning autistic, high-functioning autistic, and non-autistic developmentally disabled children.

Related Experiment Videos

  • Classification based on a full-scale IQ cutoff of 50 to define high- versus low-functioning groups.
  • Analysis focused on developmental sequences, regressions, and domain-specific profiles.

    • Main Results:

    • Few significant differences were observed in general developmental sequences among the groups.
    • Autistic children exhibited a higher likelihood of developmental regressions and unevenness across developmental domains compared to non-autistic children.
    • These developmental peculiarities were more pronounced in low-functioning autistic children than in high-functioning autistic children.

    Conclusions:

    • Developmental sequences are broadly similar, but autistic children display unique patterns of regression and uneven development.
    • Functioning level significantly influences the manifestation of developmental peculiarities in autism.
    • Findings contribute to understanding developmental processes, classification nuances, and the heterogeneity within autism spectrum disorder.