This Edited Volume, “Understanding Developmental Disorders,” is a collection of reviewed and relevant research chapters that offer a comprehensive overview of recent developments in the field of Developmental Disorders. The book comprises individual chapters authored by various researchers and edited by an expert in mental and behavioral disorders research. All chapters are complete in themselves but united under a common research study topic. This publication aims to provide a thorough overview of the latest research by international authors in this field and to open new research paths for further novel developments.