This study guide for the Assistant Behavior Analyst Technician (ABAT) exam, offered under the Quality Applied Behavior Analysis Credentialing Board (QABA), is an essential tool for those preparing to enter the rapidly expanding field of Applied Behavior Analysis (ABA). ABA is a well-recognized and increasingly utilized approach in various sectors such as healthcare, education, and social services, focusing on improving human behavior and quality of life through evidence-based interventions. This study guide is specifically designed to prepare candidates for the ABAT certification, ensuring they have a solid understanding of foundational principles, techniques, and ethical practices in ABA. It covers a range of critical topics, including behavior assessment, intervention strategies, data collection, and analysis. The guide is not only instrumental in helping candidates pass the ABAT exam but also equips them with practical skills and knowledge to be effective in their roles as assistant behavior analyst technicians.