Abstract
The Pervasive Developmental Disorder Behavior Inventory (PDDBI) was developed to measure response to intervention in children diagnosed with Autism Spectrum Disorder (ASD), as well as to aid in diagnosis for clinical and research purposes. This study examined criterion related validity of the PDDBI through comparison with the Autism Diagnostic Observation Schedule-Second Edition (ADOS-2) in 104 children ages 2–11 years. A positive relationship between the PDDBI Autism Composite and all ADOS-2 scores, as well as some subscale correlations, supported convergent validity of the PDDBI as a measure of ASD symptomatology. Additionally, a significant negative relationship between PDDBI adaptive subscales and ADOS-2 scores reinforced divergent validity. These results add to the literature on the validity of the PDDBI as a measure of ASD symptoms.
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