Modification and Validation of an Autism Observational Assessment Including ADOS-2for Use with Children with Visual Impairment.

Researchers created a special version of a standard autism assessment tool (ADOS-2) that works better for children with vision problems. They tested it with 100 children who have serious vision difficulties and found the modified tool is reliable and accurate at identifying autism. Children with visual impairment showed higher rates of autism than typically developing children, which matches what other studies have found.

This cross-sectional study validated a modified version of the ADOS-2 Module 3 for diagnosing autism in children with visual impairment. The study included 100 children (mean age 5.5 years) with congenital moderate to severe visual impairment, of whom 83 were assessed with the modified tool. The modified ADOS-2 demonstrated strong internal coherence, construct validity, and inter-rater reliability. A new diagnostic algorithm was developed showing high sensitivity and specificity against expert clinical judgment.

The tool also showed strong concurrent validity with parent-rated measures. The study found elevated rates of autism in this population, consistent with previous research indicating children with visual impairment are at higher risk for autism spectrum disorder.

The validated modified ADOS-2 provides clinicians with a reliable tool for autism assessment in children with visual impairment. This addresses a significant gap in diagnostic capability for this vulnerable population who are at elevated risk for autism but historically under-served by standard assessment protocols.

Single cross-sectional study design limits generalizability. Sample limited to children aged 4-7 years with congenital visual impairment. Long-term validity and effectiveness across different visual impairment severities not established.

Children with visual impairment (VI) are at risk of autism spectrum disorder (ASD); however standard observational diagnostic assessments are not validated for this population. The primary objective of the study is to validate a modified version of the Autism Diagnostic Observation Schedule (ADOS-2, Module 3), for children with VI. A cross-sectional observational study was undertaken with 100 (mean 5½ years, SD 10.44 months, range 4-7 years; 59 (59%) males) children with congenital disorders of the peripheral visual system with moderate/severe-profound VI. As the primary objective, 83 (83%) who were 'verbally fluent' were assessed with the modified ADOS-2(Module 3).

Their scores were investigated for reliability, construct and criterion validity against expert clinician formulation and parent-rated social and communication questionnaires (Social Responsiveness Scale-2, SRS-2; Children's Communication Checklist-2). The secondary objective with the total sample was to report on frequency and distribution of ASD ratings in this VI population. The modified ADOS-2(Module 3) was found to have strong internal coherence and construct validity (two factor model) and inter-rater reliability. A new VI diagnostic algorithm was established which showed high sensitivity and specificity against clinician formulation.

Using the best cut-off threshold for 'High Risk for ASD', strong concurrent criterion validity was found according to parent-rated scores on the SRS-2. The modified ADOS-2(Module 3) was shown to have promising reliability and validity in establishing children at 'High Risk of ASD' in this vulnerable population. Elevated rates of ASD were found across the sample, in line with previous estimates.