Brief report: macrographia in high-functioning adults with autism spectrum disorder.

Area of Science:

• Neuroscience
• Developmental Psychology
• Clinical Neurology

Background:

• Early descriptions of Asperger syndrome noted motor difficulties, but not specifically handwriting impairments.
• Autism spectrum disorder (ASD) and Asperger syndrome are now understood to share underlying neurological characteristics.
• Recent research indicates motor control impairments are common in both autism and Asperger syndrome.

Purpose of the Study:

• To formally assess and compare handwriting size in individuals with autism spectrum disorder (ASD) versus neurotypical controls.
• To investigate the prevalence of macrographia (abnormally large handwriting) in individuals with ASD.
• To explore potential correlations between handwriting characteristics and cerebellar abnormalities in ASD.

Main Methods:

• A comparative study design was employed, matching participants with ASD and control subjects on age and IQ.
• Handwriting samples were collected and analyzed to measure size.
• Statistical analysis, including covariance with educational level, was used to determine significance.

Main Results:

• Subjects with ASD demonstrated significantly larger handwriting (macrographia) compared to control subjects.
• The observed macrographia in the ASD group remained statistically significant even after accounting for educational level.
• This finding suggests a specific motor control deficit related to handwriting in ASD.

Conclusions:

• Macrographia is a prevalent motor control impairment in individuals with autism spectrum disorder.
• This handwriting characteristic may be linked to underlying anatomical abnormalities, particularly within the cerebellum, observed in ASD.
• Further research is warranted to explore the neuroanatomical basis of handwriting difficulties in ASD.