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On 10/29/2025, PAR platforms experienced a service disruption.

This incident was the result of a widespread Microsoft Azure outage that affected numerous software providers. While this disruption was outside of our control, we are actively evaluating additional redundancies to reduce the risk of similar service interruptions in the future. We sincerely apologize for any inconvenience this may have caused.

PDDBI™

Assess responsiveness to intervention in children with ASD

PDD Behavior Inventory™

The PDDBI was developed to provide what many existing assessments of children with PDD lack: evaluation of change in functioning, assessment of response to intervention, assessment of adaptive and maladaptive behaviors, identification of meaningful subgroups, and much more.

The Primary Goals of the PDDBI

  • Assess autism with age-standardized scores
  • Includes items to measure problem behaviors and social communication skills
  • Includes separate inventories for parents and teachers to address the issue of generalization 
  • Includes a measurement system to be useful in measuring responsiveness to intervention and disentangling change due to treatment from change due to development
  • Useful for multiple applications in various settings such as clinical, medical, academic, and research

Administration Format

Print
Digital

Authors

Ira L. Cohen, PhD and Vicki Sudhalter, PhD
Photo of PDDBI