Are Executive Dysfunctions Relevant for the Autism-Specific Cognitive Profile?

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Executive functions (EF) are crucial for understanding Autism Spectrum Disorder (ASD).
• However, EF deficits are not exclusive to ASD, necessitating a clearer understanding of their specific role.
• The relationship between EF and core autism traits like mentalizing requires further investigation.

Purpose of the Study:

• To explore the specific role of EF in ASD.
• To investigate the relationship between EF and core autism characteristics, specifically mentalizing (Theory of Mind - ToM).
• To determine if EF dysfunctions are relevant to the autism-specific feature of reduced mentalizing.

Main Methods:

• A systematic literature search of Medline and PsychINFO databases was conducted for studies published between 1990 and 2020.
• Included studies measured EF in individuals with ASD and typically developing (TD) controls, alongside Theory of Mind (ToM) or Weak Central Coherence (WCC) tasks.
• A pre-registered meta-analysis and cross-study regression of 42 studies (ASD n=1,546, TD n=1,206) were performed, adhering to PRISMA guidelines.

Main Results:

• Individuals with ASD demonstrated significantly lower performance across all cognitive domains compared to TD controls.
• Crucially, no significant correlation was found between executive function subdomains and Theory of Mind (ToM) performance.
• This indicates a lack of significant association between EF and ToM in ASD.

Conclusions:

• The findings challenge the relevance of executive function deficits in explaining the core autism characteristic of reduced mentalizing.
• The study suggests that EF dysfunctions may not be directly associated with the specific feature of impaired Theory of Mind in Autism Spectrum Disorder.
• Further research is needed to fully elucidate the complex interplay between cognitive functions and ASD symptomatology.