Developing a schedule to identify social communication difficulties and autism spectrum disorder in young children...

Area of Science:

• Developmental Pediatrics
• Clinical Psychology
• Ophthalmology

Background:

• Standard observational tools for autism spectrum disorder (ASD) diagnosis rely on visual behaviors, limiting their effectiveness in visually impaired children.
• Congenital visual impairments affect the peripheral visual system, necessitating specialized diagnostic approaches.
• Social communication difficulties are a core feature of ASD, often challenging to assess in the absence of sight.

Purpose of the Study:

• To introduce and evaluate the Visual Impairment and Social Communication Schedule (VISS), a novel observational instrument.
• To assess the VISS's utility in identifying social communication difficulties and ASD in young children with visual impairment.
• To determine the validity and reliability of the VISS through item analysis and comparison with established diagnostic measures.

Main Methods:

• The VISS was administered to 23 young children with varying degrees of visual impairment.
• Item analysis using the Rasch model was performed to evaluate the instrument's psychometric properties.
• The VISS was validated against the Childhood Autism Rating Scale (CARS) and clinical ASD diagnoses.

Main Results:

• Item analysis indicated the VISS items fit the Rasch model.
• A strong negative correlation was found between VISS and CARS total scores (Spearman's rho=-0.89; p=0.01).
• A VISS threshold score of 35 demonstrated high agreement with clinical ASD diagnoses (sensitivity 89%, specificity 100%).

Conclusions:

• The Visual Impairment and Social Communication Schedule (VISS) is a promising tool for aiding ASD identification in visually impaired children.
• The VISS effectively identifies social communication difficulties in this population.
• Further research is warranted to confirm the VISS's utility in diverse clinical settings.