This book describes the outcomes of the project Skills in Psychodiagnostics. These outcomes consist of seven digital modules that can be used by students in psychology and pedagogy to acquire the professional skills for adequate psychodiagnostics. With this book you hold the key to enter the interactive programme on www.diskitpsy.com. In this programme students have to do exercises with increasing complexity, often after the observation of videotaped interactions between a helper and a client. After finishing the exercise, they receive feedback by comparing their solutions with an expert solution. The professional skills under attention are: general skills such as observation and professional ethics, clinical psychodiagnostics for adults, and developmental psychodiagnostics for children and adolescents. Students can independently develop a lot of experience with the complex practice of psychodiagnostics and assessment. Using a separate code, teachers are able to follow the students' progress. In this book you will find the backgrounds and clarifications of the seven digital modules.