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Disorganization: the forgotten executive dysfunction in high-functioning autism (HFA) spectrum disorders
Lauren E Kenworthy1, David O Black, Gregory L Wallace
1Center for Autism Spectrum Disorders, Children's National Medical Center, Rockville, MD 20850, USA. lkenwort@cnmc.org
Developmental Neuropsychology
|November 4, 2005
Summary
Children with high-functioning autism (HFA) and Asperger Disorder (AD) show global executive function (EF) deficits, particularly in flexibility and organization. These findings highlight specific cognitive challenges in autism spectrum disorders.
Area of Science:
- Developmental Psychology
- Neurodevelopmental Disorders
- Cognitive Neuroscience
Background:
- Executive functions (EF) are crucial for adaptive behavior and are often impaired in neurodevelopmental disorders.
- Autism Spectrum Disorder (ASD), including high-functioning autism (HFA) and Asperger Disorder (AD), is characterized by social-communication deficits and restricted, repetitive behaviors, often accompanied by cognitive variations.
- Understanding EF profiles in HFA and AD is essential for targeted interventions and educational support.
Purpose of the Study:
- To investigate executive function (EF) abilities in children diagnosed with high-functioning autism (HFA) spectrum disorders.
- To compare EF performance between HFA and Asperger Disorder (AD) groups.
- To identify specific EF domains most affected in children with HFA and AD using discrepancy analysis for multi-demand tasks.
Main Methods:
- Involved 72 children diagnosed with high-functioning autism (HFA) spectrum disorders.
- Utilized parent ratings and performance on laboratory-based executive function (EF) measures.
- Employed discrepancy analysis to isolate EF on tasks with multiple demands.
Main Results:
- No consistent differences in executive function (EF) were found when comparing the HFA and Asperger Disorder (AD) groups.
- A global deficit in executive function (EF) was observed in the combined group of children with HFA and AD.
- Specific deficits were most prominent in the EF domains of cognitive flexibility and organization.
Conclusions:
- Children with high-functioning autism (HFA) and Asperger Disorder (AD) exhibit significant global executive function (EF) challenges.
- Cognitive flexibility and organizational skills appear to be particularly vulnerable EF domains within these populations.
- Findings underscore the need for tailored support addressing specific EF deficits in children with HFA and AD.