Originally published in 1987, this book, attempted to bring together work by researchers concerned with the functional and neurological mechanisms underlying visual object processing, and the ways in which such mechanisms can be neurologically impaired. The editors termed it a 'Cognitive Neuropsychological' approach, because they believed it tried to relate evidence from neurological impairments of visual object processing to models of normal performance in a new and important way. Two broad aims are apparent. One is to test models of normal performance by evaluating how well the models account for the patterns of impairment and preservation of abilities that can occur following brain damage. The other is to use models of normal performance to further their understanding of acquired disorders of visual object processing. These aims distinguish the approach from neuropsychological work whose primary aim is to relate acquired deficits to the sites of damage, and from work in the field of cognitive psychology which attempts only to develop models of normal performance.

Visual agnosia is a rare but fascinating disorder of visual object recognition that can occur after a brain lesion. This book documents the case of John, who worked intensively with the authors for 26 years after acquiring visual agnosia following a stroke. It revisits John s case over twenty years after it was originally described in the book "To See But Not To See," in 1987. As in the previous book, the condition is illuminated by John and his wife, Iris, in their own words."

A Case Study in Visual Agnosia Revisited "discusses John s case in the context of research into the cognitive neuroscience of vision over the past twenty years. It shows how John s problems in recognition can provide important insights into the way that object recognition happens in the brain, with the results obtained in studies of John s perception being compared to emerging work from brain imaging in normal observers. The book presents a much fuller analysis of the variety of perceptual problems that John experienced, detailing not only his impaired object recognition but also his face processing, his processing of different visual features (colour, motion, depth), his ability to act on and negotiate his environment, and his reading and writing."

A Case Study in Visual Agnosia Revisited "will be a key reference for those concerned with understanding how vision is implemented in the brain. It will be suitable for both undergraduate students taking courses in cognitive psychology and neuropsychology, and also researchers in the cognitive neuroscience of vision. The presentation of John s case, and the human aspects of the disorder, will also be of great interest to a general audience of lay people interested in perception.

Visual agnosia is a rare but fascinating disorder of visual object recognition that can occur after a brain lesion. This book documents the case of John, who worked intensively with the authors for 26 years after acquiring visual agnosia following a stroke. It revisits John s case over twenty years after it was originally described in the book "To See But Not To See," in 1987. As in the previous book, the condition is illuminated by John and his wife, Iris, in their own words."

A Case Study in Visual Agnosia Revisited "discusses John s case in the context of research into the cognitive neuroscience of vision over the past twenty years. It shows how John s problems in recognition can provide important insights into the way that object recognition happens in the brain, with the results obtained in studies of John s perception being compared to emerging work from brain imaging in normal observers. The book presents a much fuller analysis of the variety of perceptual problems that John experienced, detailing not only his impaired object recognition but also his face processing, his processing of different visual features (colour, motion, depth), his ability to act on and negotiate his environment, and his reading and writing."

A Case Study in Visual Agnosia Revisited "will be a key reference for those concerned with understanding how vision is implemented in the brain. It will be suitable for both undergraduate students taking courses in cognitive psychology and neuropsychology, and also researchers in the cognitive neuroscience of vision. The presentation of John s case, and the human aspects of the disorder, will also be of great interest to a general audience of lay people interested in perception.

The case study of John has provided a unique insight into the nature of visual agnosia and more broadly into the underlying processes which support human vision. After suffering a stroke, John had problems in recognizing common objects, faces, seeing colours, reading and finding his way around his environment. A Reader in Visual Agnosia brings together the primary scientific papers describing the detailed investigations for each visual problem which the authors carried out with John, known as patient HJA. This work was summarised initially in To See But Not To See (1987), and 26 years later in A Case Study in Visual Agnosia Revisited (2013). The chapters are divided into 6 parts corresponding to the key areas of investigation: Integrative visual agnosia Perception of global form Face perception Colour perception Word recognition Changes over time Each part contains a short introduction, written by the two leading researchers who worked with John, which highlights the relations between the papers and demonstrates the pathway of the case analysis. The book will be invaluable to students and researchers in visual cognition, cognitive neuropsychology and vision neuroscience.

First published in 1987. Routledge is an imprint of Taylor and Francis, an informa company.

Originally published in 1987, this book, attempted to bring together work by researchers concerned with the functional and neurological mechanisms underlying visual object processing, and the ways in which such mechanisms can be neurologically impaired. The editors termed it a 'Cognitive Neuropsychological' approach, because they believed it tried to relate evidence from neurological impairments of visual object processing to models of normal performance in a new and important way. Two broad aims are apparent. One is to test models of normal performance by evaluating how well the models account for the patterns of impairment and preservation of abilities that can occur following brain damage. The other is to use models of normal performance to further their understanding of acquired disorders of visual object processing. These aims distinguish the approach from neuropsychological work whose primary aim is to relate acquired deficits to the sites of damage, and from work in the field of cognitive psychology which attempts only to develop models of normal performance.

Over the past forty years much work has assessed how attention modulates perception, but relatively little work has evaluated the role of attention in action. This is despite the fact that recent research indicates that the relation between attention and action is a crucial factor in human performance. Attention in Action provides state-of-the-art discussion of the role of attention in action and of action in constraining attention. The research takes an interdisciplinary approach covering experimental studies of attention and action, neuropsychological studies of patients with impaired action and attention, single cell studies of cross-modal links in attention and action, and brain imaging studies on the underlying neural circuitry. Contributions from prominent international researchers both review the field and present new evidence, making this book an invaluable resource for researchers and therapists alike.

Brain damage may sometimes cause remarkably specific impairments in human behaviour. One very rare and specific impairment is the failure to recognize everyday objects by sight, a problem which is termed "visual agnosia". In this book, the authors discuss the case of a patient, John, who suffered from visual agnosia after having a stroke. John also had difficulty recognizing faces or his immediate environment. The book considers John's case from the point of view of current psychological theories of visual recognition, and from a review of other documented cases. It goes on to consider the implications of John's problems for understanding how we might normally recognize objects, drawing on investigations of his impairments. The book also includes chapters contributed by John and his wife.

The case study of John has provided a unique insight into the nature of visual agnosia and more broadly into the underlying processes which support human vision. After suffering a stroke, John had problems in recognizing common objects, faces, seeing colours, reading and finding his way around his environment. A Reader in Visual Agnosia brings together the primary scientific papers describing the detailed investigations for each visual problem which the authors carried out with John, known as patient HJA. This work was summarised initially in To See But Not To See (1987), and 26 years later in A Case Study in Visual Agnosia Revisited (2013). The chapters are divided into 6 parts corresponding to the key areas of investigation: Integrative visual agnosia Perception of global form Face perception Colour perception Word recognition Changes over time Each part contains a short introduction, written by the two leading researchers who worked with John, which highlights the relations between the papers and demonstrates the pathway of the case analysis. The book will be invaluable to students and researchers in visual cognition, cognitive neuropsychology and vision neuroscience.

First published in 2012. Routledge is an imprint of Taylor & Francis, an informa company.

First published in 2012. Routledge is an imprint of Taylor & Francis, an informa company.