What is the PDDBI?
The PDDBI is an assessment designed to measure the effectiveness of treatments for children with significant developmental disabilities, including autism spectrum disorder (ASD). The test is an informant-based ratings scale that focuses on behavioral challenges, key skills and abilities.
The PDD Behavior Inventory (PDDBI) is a rating scale filled out by caregivers or teachers that was designed to assess children having a Pervasive Developmental Disorder (PDD; autism, Asperger disorder, PDD-NOS, or childhood disintegrative disorder). Both adaptive and maladaptive behaviors are assessed in the scale, making it useful for treatment studies in which decreases in maladaptive behaviors and improvements in adaptive social and language skills relevant to PDD are expected. The adaptive behaviors assessed include core features of the disorder such as joint attention skills, pretend play, and referential gesture. The maladaptive behaviors sample a wide variety of behaviors observed in both lower- and higher-functioning individuals and include stereotyped behaviors, fears, aggression, social interaction deficits, and aberrant language.
Why is the PDDBI used?
Standardized assessments give families and provider teams clear, consistent measurements of progress over time when compared against treatment plan goal progress. TRICARE has selected the PDDBI as it focuses on the core deficits of autism based on the DSM-V criteria.
The inventory was found to have a high degree of internal consistency. Inter-rater reliability was better for adaptive behaviors than for maladaptive behaviors. Factor analyses confirmed the structure of the PDDBI and indicated good construct validity.