Performance On Perceptual Structural Priming Tasks In Patients With Probable Alzheimer S Disease Ad
DOWNLOAD eBooks
Download Performance On Perceptual Structural Priming Tasks In Patients With Probable Alzheimer S Disease Ad PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Performance On Perceptual Structural Priming Tasks In Patients With Probable Alzheimer S Disease Ad book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Performance On Perceptual Structural Priming Tasks In Patients With Probable Alzheimer S Disease Ad
DOWNLOAD eBooks
Author : Lauren Elyse Norton
language : en
Publisher:
Release Date : 1998
Performance On Perceptual Structural Priming Tasks In Patients With Probable Alzheimer S Disease Ad written by Lauren Elyse Norton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Alzheimer's disease categories.
While AD patients typically demonstrate impairment on "conceptually-driven" priming tasks, discrepant findings have emerged with regard to their performance on "data-driven," or perceptual, priming tasks. In an attempt to explain this variable priming performance, Gabrieli et al. (1994) proposed that implicit memory tasks may be driven by two separate systems: one mediating memory for "lexical-semantic" information and the other mediating memory for "perceptual-structural" material. The performance of AD patients on a series of perceptual priming tasks was examined. First, the possibility was addressed that findings of intact perceptual priming in AD may be partially explained by inadequate task sensitivity. Thus, within all experiments, (1) a finer measure of priming performance was used (e.g., reaction times) and (2) the test materials covered a range of difficulty. Further, experiments 2 and 3 addressed the need to evaluate perceptual priming using test materials that require little to no lexical or semantic processing. Participants were 15 AD patients and 15 age-matched normal control subjects (NCs). In experiment 1, a picture fragment identification task was administered. Findings revealed that the AD patients showed impaired priming relative to the NCs. Within experiment 2, two separate priming tasks were administered, one requiring the speeded copying of words and the other requiring the copying of patterns. Findings revealed no group difference in priming within either task, even when baseline differences in copying speed were statistically accounted for. Experiment 3 compared performance on two repetition priming tasks requiring that participants make speeded decisions about whether two stimuli were the same or different. One of the tasks used words as test stimuli while the other used meaningless objects. Findings revealed that the AD patients were significantly impaired relative to the NCs on the object, but not the word, priming task. Follow-up analyses within all three experiments revealed differential effects of item difficulty on priming performance. The current findings of impaired perceptual priming in AD in two out of five tasks do not support Gabrieli's multiple memory systems view. Degree of task sensitivity appears to influence the appearance of impaired priming performance in AD.
The Effect Of Delay On Conceptual And Perceptual Priming In Alzheimer S Disease
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 2009
The Effect Of Delay On Conceptual And Perceptual Priming In Alzheimer S Disease written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Alzheimer's disease categories.
Repetition priming in which the initial presentation of a stimulus facilitates its subsequent processing through activation of its visual/auditory form (perceptual priming) is often normal in Alzheimer's disease (AD), whereas priming that depends upon activation of lexical/semantic associations (conceptual priming) is often impaired. This pattern of implicit memory deficits could reflect differential degradation of cortically-mediated conceptual versus perceptual representations, a general deficit in attention/alerting, or cortical activation deficiencies that interact with the integrity of representations. To explore these possibilities, the present study compared the performances of 20 AD and 20 normal elderly control (EC) subjects on word-stem completion (WSC) and perceptual identification (PI) priming tasks with either no delay or a 10-minute delay between study and test phases. Explicit memory, visual attention, and phasic alerting (i.e., stimulus-driven enhancement of sensory processing that may reflect cortical activation) were also assessed. Results showed that AD patients were impaired in both delay conditions of the WSC test, but had a normal rate of decay of priming. The magnitude and rate of decay of priming in the PI task was normal in the AD patients. As expected, AD patients were impaired and exhibited abnormally rapid forgetting on explicit memory measures, but these effects did not correlate with the magnitude or rate of decay of WSC or PI priming. Alerting and orienting of attention was normal in AD patients and did not correlate with WSC or PI priming effects. WSC priming correlated with performance on a language/semantic memory test. These results confirm previously observed dissociations between impaired conceptual and preserved perceptual priming in AD and further show that priming in both tasks dissipates at a normal rate. This normal rate of decay of priming, along with normal attention and alerting effects, suggests that insufficient cortical activation does not underlie the priming deficit in AD. Rather, impaired conceptual priming may be better explained by degradation of cortically-mediated conceptual representations that must be activated in the WSC task but not in the PI task. Thus, the integrity of priming in AD may depend upon the nature of the representation rather than the fate of cortical activation.
Dissertation Abstracts International
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 2004
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Dissertations, Academic categories.
The Effect Of Delay On Conceptual And Perceptual Priming In Alzheimer S Disease Relationship To Attention And Cortical Activation
DOWNLOAD eBooks
Author : Amy E. Kane
language : en
Publisher:
Release Date : 2009
The Effect Of Delay On Conceptual And Perceptual Priming In Alzheimer S Disease Relationship To Attention And Cortical Activation written by Amy E. Kane and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Alzheimer's disease categories.
Repetition priming in which the initial presentation of a stimulus facilitates its subsequent processing through activation of its visual/auditory form (perceptual priming) is often normal in Alzheimer's disease (AD), whereas priming that depends upon activation of lexical/semantic associations (conceptual priming) is often impaired. This pattern of implicit memory deficits could reflect differential degradation of cortically-mediated conceptual versus perceptual representations, a general deficit in attention/alerting, or cortical activation deficiencies that interact with the integrity of representations. To explore these possibilities, the present study compared the performances of 20 AD and 20 normal elderly control (EC) subjects on word-stem completion (WSC) and perceptual identification (PI) priming tasks with either no delay or a 10-minute delay between study and test phases. Explicit memory, visual attention, and phasic alerting (i.e., stimulus-driven enhancement of sensory processing that may reflect cortical activation) were also assessed. Results showed that AD patients were impaired in both delay conditions of the WSC test, but had a normal rate of decay of priming. The magnitude and rate of decay of priming in the PI task was normal in the AD patients. As expected, AD patients were impaired and exhibited abnormally rapid forgetting on explicit memory measures, but these effects did not correlate with the magnitude or rate of decay of WSC or PI priming. Alerting and orienting of attention was normal in AD patients and did not correlate with WSC or PI priming effects. WSC priming correlated with performance on a language/semantic memory test. These results confirm previously observed dissociations between impaired conceptual and preserved perceptual priming in AD and further show that priming in both tasks dissipates at a normal rate. This normal rate of decay of priming, along with normal attention and alerting effects, suggests that insufficient cortical activation does not underlie the priming deficit in AD. Rather, impaired conceptual priming may be better explained by degradation of cortically-mediated conceptual representations that must be activated in the WSC task but not in the PI task. Thus, the integrity of priming in AD may depend upon the nature of the representation rather than the fate of cortical activation.
Comprehensive Handbook Of Psychopathology
DOWNLOAD eBooks
Author : Henry E. Adams
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
Comprehensive Handbook Of Psychopathology written by Henry E. Adams and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Psychology categories.
The purpose of this handbook, originally published in 1984, was to provide a compreh- sive review of current clinical descriptions, research , and theories of psychopathology. Descriptive psychopathology is a ?eld that forms the foundation of clinical practice and research in clinical psychology, psychiatry, psychiatric social work, psychiatric nursing, and allied professions in mental health. Since the 1st edition, the editors have devised and updated a handbook to cover both general and speci?c topics in psychopathology that would be useful to researchers, practitioners, and graduate or other advanced students in the mental health and behavioral medicine professions. To implement this plan, we have very carefully chosen colleagues whom we respect for their expertise in particular ?elds. These authors include both clinicians and researchers who have outstanding national reputations, as well as more junior behavioral scientists and clinicians who, in our opinion, will achieve similar recognition in the future. The excellent chapters in this book lead us to believe that we have chosen wisely. We would like to express our appreciation to these authors for their outstanding contributions and cooperation.
Dementia And Memory
DOWNLOAD eBooks
Author : Lars-Göran Nilsson
language : en
Publisher: Psychology Press
Release Date : 2013-11-20
Dementia And Memory written by Lars-Göran Nilsson and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-20 with Psychology categories.
A negative effect of the ageing population is that more individuals are experiencing cognitive decline and some form of neurodegenerative disease. With the number of people experiencing dementia likely to double in the next 20 years, this change in society presents one of greatest challenges facing public health personnel in the 21st century. The aim of this volume is to describe research that is in progress, and the major findings that have been obtained in the scientific study of dementia. The chapters in the first section of the book focus upon early signs of dementia, and consider several approaches to finding early cognitive signs and biological markers of dementia. The second section considers whether dementia is inevitable for people who become very old, and features chapters on risk factors and proactive influences, cognitive reserve and intervention. Each chapter in the final section describes phenomena which are related to differences in function between memory systems, including anterograde memory in fronto-temporal dementia, and the role semantic memory and semantic cognition may play in developing an understanding of the development of the degenerative processes in dementia. With contributions from world-class researchers in this area, the volume offers a concise overview of key findings in recent research on dementia and memory. It will be of great interest to researchers and advanced students of cognitive psychology, and to those working in related fields, such as gerontology, rehabilitation sciences, and allied health.
Touch And Blindness
DOWNLOAD eBooks
Author : Morton A. Heller
language : en
Publisher: Psychology Press
Release Date : 2006-04-21
Touch And Blindness written by Morton A. Heller and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-21 with Psychology categories.
Research on touch and blindness has undergone rapid transformation in recent years, with dramatic developments in technology designed to provide assistance to those who are blind, and advancements in robotics that demand haptic interfaces. Touch and Blindness approaches the study of the topic from the perspectives of psychological methodology and the most sophisticated, state-of-the-art techniques in neuroscience. This book, edited by well-known leaders in the field, is derived from the discussions presented by speakers at a conference held in 2002, and presents current research in the field. The book is arranged in a logical, disciplinary fashion, first discussing touch and blindness from a psychological perspective, followed by an examination from the perspective of neuroscience. Some specific topics include: *processing spatial information from touch and movement; *form, projection, and pictures for the blind; *neural substrate and visual and tactile object representations; and *the role of visual cortex in tactile processing. Touch and Blindness is ideal for researchers in psychology and neuroscience, medicine, and special education.
Implicit Memory
DOWNLOAD eBooks
Author : Peter Graf
language : en
Publisher: Psychology Press
Release Date : 2013-12-02
Implicit Memory written by Peter Graf and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-02 with Psychology categories.
The immense growth of research on implicit and explicit memory is making it difficult to keep up with new methods and findings, to gauge the implications of new discoveries, and to ferret out new directions in research and theory development. The present volume provides a status report of work on implicit and explicit memory in the three areas that have contributed the bulk of what is known about this domain -- cognitive psychology, lifespan developmental psychology, and neuropsychology. Highlighting developments in methods, critical findings, and theoretical positions, this volume outlines promising new research directions. By so doing, it provides the reader with a multi-disciplinary perspective on implicit and explicit memory, and thereby enables a cross- fertilization of ideas and research. The chapters that make up this volume were written by experts on the topic of implicit and explicit memory. These contributors were asked to write for a broad audience -- for their colleagues from allied disciplines, for new researchers, for advanced undergraduate and graduate students -- to help them gain a comprehensive overview of the mushrooming research on this topic, grasp the most fundamental empirical and theoretical issues, and focus on new research directions.
The Clinical Management Of Early Alzheimer S Disease
DOWNLOAD eBooks
Author : Reinhild Mulligan
language : en
Publisher: Psychology Press
Release Date : 2013-05-13
The Clinical Management Of Early Alzheimer S Disease written by Reinhild Mulligan and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-05-13 with Psychology categories.
The enormous human and economic toll of Alzheimer's Disease in societies in which more and more people are living into old age is well-recognized. Scientists and practitioners alike have been working to limit it. Their major focus has been patients in the later stages of the disease, when dementia is fully established. Yet patients in the early stages of cognitive decline, far more numerous, often still living independently with family members, present a bewildering variety of challenges. Bringing together leading authors with diverse expertise, this Handbook offers the first comprehensive overview of approaches to the management of early-stage issues. The authors summarize the important implications of the latest research in their own fields for: * the recognition and formal diagnosis of cognitive problems; * the assessment of specific difficulties in daily functioning; * the formulation of a management plan integrating pharmacological, neuropsychological, behavioral, and cognitive strategies; and * the facilitation and support of caregivers' efforts. All professionals involved in any way with the care of early Alzheimer's patients and their families will find this book an indispensable reference.
Cumulated Index Medicus
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 2000
Cumulated Index Medicus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Medicine categories.