Performance validity testing is a very familiar area to neuropsychologists carrying out medico-legal work, and one that is not without its complexities, in terms of ethical issues and scientific and practical considerations. Validity assessment in clinical neuropsychological practice: evaluating and managing noncredible performance: edited by Ryan W. Schroeder and Phillip K. Martin, Guilford Press, New York, 2022, 478pp, £62.99 Hardcover There is also a chapter comparing validity assessments in children and adolescents with adult evaluations, and finally a chapter on using PVTs in legal settings. [Extracted from the article]