"For real advances in the field of executive functioning (EF) to occur, we need, first and foremost, a clear definition of the term. Barkley has provided that clarity. He explains what executive functions are, why they are critical to our day-to-day existence, and how they affect society. He justifiably rejects psychometric assessments of executive functions, based on their lack of ecological validity, and instead proposes multilevel assessments grounded in the natural environment. As a clinician working in the real world of people with EF deficits, the fact that Barkley's theory yields logical and applicable strategies for intervention is of great significance to me."--Richard Guare, PhD, Director, Center for Learning and Attention Disorders, Portsmouth, New Hampshire"Barkley has never been one to shy away from new theories and ideas. He is perhaps one of the foremost critical thinkers of our time. Executive Functions is a tour de force of creativity and wide-ranging thinking. Barkley offers a reasoned and reasonable theory to understand the emerging field of EF and its related disorders. The chapter on clinical implications is particularly important for practitioners. This book is essential reading for researchers, clinicians, and students interested in the complexities of brain-behavior relationships and human adaptation."--Sam Goldstein, PhD, Department of Psychiatry, University of Utah School of Medicine; Clinical Director, Neurology, Learning, and Behavior Center, Salt Lake City

"Barkley presents the best and most comprehensive and systematic overview of the field of EF to date. His coherent theory of EF has the potential to profoundly change the way EF is studied and assessed in clinical populations. In outlining the problems of how to conceptualize and assess EF--and providing compelling evidence for an extended phenotype model--he offers a desperately needed roadmap for future research. This volume should be on the bookshelf of every practicing clinical neuropsychologist, and is a 'must read' for students in neuropsychology and cognitive neuroscience."--Ellen Braaten, PhD, Department of Psychiatry, Massachusetts General Hospital/Harvard Medical School