Glyn Humphreys is Watts Professor of Experimental Psychology at the University of Oxford, UK. His research covers the diagnosis and management of cognitive problems after brain injury, visual attention, perception, language and the control of action, and social cognition. He has published over 500 papers in international journals and 16 books. Jane Riddoch is Professorial Research Fellow at the University of Oxford, UK. Her research covers visual disorders (agnosia, optic aphasia), disorders of attention (neglect, extinction), and action (apraxia, action disorganisation syndrome) and neuropsychological rehabilitation. She has published 150 papers in leading international journals and authored/edited five books.
'This book represents the very best of scientific sleuthing and captures the ingenuity of researchers delving into the mechanisms underlying visual agnosia. This scientific account is coupled with the personal and poignant story of a man, his life and two dedicated researchers. It is both intellectually compelling and heartwarming. This book is a wonderful illustration of the evolution of scientific knowledge, as Riddoch and Humphreys revisit their studies of John, and show how our understanding of visual agnosia and its underlying mechanisms has grown since 1987. The book is scientifically grounded and, at the same time, offers a charming account of a patient and his ups and downs. The approach adopted by Humphreys and Riddoch reflects the best of cognitive neuropsychology using detailed single-case study methodology. The experiments are ingenious and creative and the results elucidate the mechanisms underlying visual agnosia. A brilliant and compelling read for anyone interested in how the brain works.' - Marlene Behrmann, Department of Psychology, Carnegie Mellon University, USA 'Through the fascinating first-hand descriptions of the patient, HJA, we learn what it is like to lose many of the essential features of vision (such as the ability to recognise colours and objects) but yet still have the experience of seeing; and through the ingenious research of Humphreys and Riddoch we learn what this tells us about how the brain creates our vision of the world. This classic book is a great read and very accessible.' - Jamie Ward, Department of Psychology, University of Sussex, UK 'This book represents the very best of scientific sleuthing and captures the ingenuity of researchers delving into the mechanisms underlying visual agnosia. This scientific account is coupled with the personal and poignant story of a man, his life and two dedicated researchers. It is both intellectually compelling and heartwarming. This book is a wonderful illustration of the evolution of scientific knowledge, as Riddoch and Humphreys revisit their studies of John, and show how our understanding of visual agnosia and its underlying mechanisms has grown since 1987. The book is scientifically grounded and, at the same time, offers a charming account of a patient and his ups and downs. The approach adopted by Humphreys and Riddoch reflects the best of cognitive neuropsychology using detailed single-case study methodology. The experiments are ingenious and creative and the results elucidate the mechanisms underlying visual agnosia. A brilliant and compelling read for anyone interested in how the brain works.' - Marlene Behrmann, Department of Psychology, Carnegie Mellon University, USA 'Through the fascinating first-hand descriptions of the patient, HJA, we learn what it is like to lose many of the essential features of vision (such as the ability to recognise colours and objects) but yet still have the experience of seeing; and through the ingenious research of Humphreys and Riddoch we learn what this tells us about how the brain creates our vision of the world. This classic book is a great read and very accessible.' - Jamie Ward, Department of Psychology, University of Sussex, UK