PAR is proud to announce we have added a white paper on how to use the Autism Spectrum Disorder Decision Tree with the PDD Behavior Inventory to our website. This supplemental resource will help readers use the products for screening and intervention planning. Customers can find the new white paper under the Resources tab on the PDDBI page or via this direct link . The PDDBI: Autism Spectrum Disorder Decision Tree (ASD-DT) can help clinicians navigate the challenging path of a possible autism spectrum disorder diagnosis . Using scores from the PDDBI Extended Form, the ASD-DT can help identify an ASD subgroup or a non-ASD diagnosis . The ASD-DT and the PDDBI provide a standardized measure to help clinicians work through many possibilities to provide precise intervention recommendations.