Neuropsychology of Malingering and Non-Credible Presentations: Perspectives on Validity Assessment is a comprehensive guide to understanding and addressing concerns about the accuracy of cognitive performances and symptom reports during neuropsychological evaluations. This updated second edition reflects major advances in the field, offering practical strategies for diagnosing, documenting, and managing validity issues in both clinical and forensic contexts. This book begins with foundational concepts of validity assessment, including the evolution of key terms and statistical principles. It then moves into detailed case examples across diverse settings – civil and criminal litigation, disability evaluations, and routine clinical practice – illustrating how performance and symptom validity concerns arise and are addressed. Additional chapters explore cultural and linguistic considerations, ethical and professional issues, and the integration of multiple data sources such as interviews, behavioral observations, and psychometric testing. The content emphasizes real-world application while avoiding unnecessary technical jargon. This book is designed for advanced trainees and experienced professionals in clinical neuropsychology, as well as those working in forensic psychology and related fields. It serves as a practical resource for anyone seeking to improve their ability to detect, interpret, and manage non-credible presentations across a wide range of evaluation contexts.