A major challenge to state and jurisdictional policymakers in implementing the Early Intervention Program for Infants and Toddlers with Disabilities, Part C under the Individuals with Disabilities Education Act (IDEA), is determining definitions of developmental delay and criteria of eligibility for services to young children, birth through 2…

Antecedent-Behavior-Consequence (A-B-C) recordings are often used in school settings as part of a functional assessment. A number of limitations are associated with A-B-C recordings, and a novel approach for describing data from A-B-C recordings is to compute conditional probabilities that can be graphed in the general operant contingency space to…

Under Part C of the Individuals with Disabilities Education Act (IDEA), participating states and jurisdictions must provide services to children who are either experiencing developmental delays, or who have a diagnosed mental or physical condition that has a high probability of resulting in developmental delay. Additionally, states may choose to…