Module 5: Determining the ABCs of Behavior via a Functional Assessment . In Principles of Behavior Analysis and Modification (4th ed.). Retrieved from Child Observation: The Heart of Individualizing R...Module 5: Determining the ABCs of Behavior via a Functional Assessment . In Principles of Behavior Analysis and Modification (4th ed.). Retrieved from Child Observation: The Heart of Individualizing Responsive Care for Infants and Toddlers: https://eclkc.ohs.acf.hhs.gov/child-...g-observations The Reggio Emilia influence at the University of Michigan-Dearborn Child Development Center: Challenges and change.