Visual noise effect on reading in three developmental disorders: ASD, ADHD, and DD

Area of Science:

• Neurodevelopmental Disorders
• Cognitive Psychology
• Reading Science

Background:

• Autism Spectrum Disorder (ASD), Attention Deficit Hyperactivity Disorder (ADHD), and Developmental Dyslexia (DD) share common challenges like visual processing and reading deficits.
• These developmental disorders may involve increased internal neural noise and impaired external noise filtering.
• Understanding reading performance in these groups is crucial for targeted interventions.

Purpose of the Study:

• To compare the reading performance of children with ASD, ADHD, and DD against typically developing (TD) children.
• To investigate the impact of external visual noise on the reading of words and pseudowords in these groups.
• To identify disorder-specific reading characteristics under varying noise conditions.

Main Methods:

• Sixty-four children and adolescents were divided into four groups: ASD, ADHD, DD, and TD.
• Participants read aloud unrelated words and pseudowords under no-noise and varying levels of visual noise conditions.
• Reading time and error rates were measured to assess reading performance.

Main Results:

• Typically developing (TD) children demonstrated the fastest reading times and lowest error rates.
• Autism Spectrum Disorder (ASD) and ADHD groups showed increased reading times and errors, particularly with added noise.
• Developmental Dyslexia (DD) group exhibited the poorest reading performance across all noise levels.
• At high noise levels, reading speed and accuracy became similar across all groups.

Conclusions:

• ASD, ADHD, and DD groups display unique reading impairments, characterized by prolonged reading times and higher error rates.
• The study highlights how linked reading speed and accuracy reveal developmental differences.
• Visual noise effectively differentiates reading processes in these developmental disorders, informing educational strategies.