Thoroughly covering the “why” and “how” of validity testing with children and adolescents, this book is edited and written by leaders in the field. Feigning or noncredible effort during psychological and neuropsychological assessments can have considerable repercussions for diagnosis, treatment, and use of resources. Practical guidance is provided for detecting and managing noncredible responding, including vivid case material. The reasons that children may feign during testing are also explored. Along with information relevant to all assessment settings, the book features specific chapters on educational, medical, sport-related, forensic, and Social Security Disability contexts.