Assessing Autism Spectrum Disorder in People with Sensory Impairments Combined with Intellectual Disabilities

People with sensory impairments combined with intellectual disabilities show behaviours that are similar to Autism Spectrum Disorder (ASD). The instrument Observation of Autism in people with Sensory and Intellectual Disabilities (OASID) was developed to diagnose ASD in this target group. The curren...

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Bibliographic Details
Published in:Journal of developmental and physical disabilities 2018-08, Vol.30 (4), p.471-487
Main Authors: de Vaan, Gitta, Vervloed, Mathijs P. J., Peters-Scheffer, Nienke C., van Gent, Tiejo, Knoors, Harry, Verhoeven, Ludo
Format: Article
Language:English
Subjects:
Autism
Autism Spectrum Disorders
Behavioral Science and Psychology
Child and School Psychology
Childhood
Intellectual disabilities
Intellectual Disability
Interrater Reliability
Original
Original Article
Pediatrics
Pervasive developmental disorders
Psychology
Psychometrics
Public Health
Quantitative psychology
Rating Scales
Reliability
Validity
Visual impairment
Visual Impairments
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Summary:People with sensory impairments combined with intellectual disabilities show behaviours that are similar to Autism Spectrum Disorder (ASD). The instrument Observation of Autism in people with Sensory and Intellectual Disabilities (OASID) was developed to diagnose ASD in this target group. The current study focuses on the psychometric properties of OASID. Sixty individuals with intellectual disabilities in combination with visual impairments and/or deafblindness participated in this study. The OASID assessment was administered and rated by three independent observers. By means of expert consensus cut-off scores for OASID were created. To determine the concurrent validity OASID was compared with the Pervasive Developmental Disorder for People with Mental Retardation (PDD-MRS) and the Childhood Autism Rating Scale second edition (CARS-2). The intra-rater reliability, the inter-rater reliability, internal consistency and concurrent validity of OASID were good to excellent. Cut-off scores were established based on criteria from the DSM-5. OASID was able to differentiate between four severity levels of ASD.
ISSN:1056-263X
1573-3580
DOI:10.1007/s10882-018-9597-x