PDD Behavior Inventory™ (PDDBI™)

This informant-based rating scale is designed to assist in the assessment of children who have been diagnosed with autism spectrum disorder (ASD).

Features and benefits

• Unlike existing assessments for ASD, the PDDBI was developed to assess both problem behaviors as well as appropriate social, language, and learning/memory skills.
• Age-standardized scores for parent and teacher ratings are provided.

Test structure

• The standard set of items is appropriate if the primary concerns are specifically related to autism (e.g., whether treatment is specifically affecting targeted behaviors).
• The extended set of items—available on both parent and teacher rating forms—is appropriate when you want to assess aspects of the child’s behaviors beyond those specifically associated with autism (e.g., fear and aggression); these may be relevant in the determination of placement and treatment recommendations.

Technical information

• Standardization sample consisted of 369 parents and 277 teachers of children with well-defined autism from a range of racial/ethnic backgrounds and geographic regions.
• Test-retest stability for the teacher ratings ranged from .65 to .99 over an average 2-week interval. For the parent sample, test-retest stability ratings ranged from .38 to .91 over a 12-month interval.
• Concurrent validity was assessed through comparison with the Childhood Autism Rating Scale, the Nisonger Child Behavior Scales, the Vineland Adaptive Behavior Scales, and the Griffiths Mental Development Scales.
• Clinical validity was assessed through comparison with the ADI-R, the ADOS-G, and the Vineland Adaptive Behavior Scales.