Download or read book Executive Function Processing Speed and Working Memory as Mediators of Age related Decline in Verbal Memory Encoding and Retrieval Processes written by Tara Lynn Victor and published by . This book was released on 2003 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Working Memory Capacity written by Nelson Cowan and published by Psychology Press. This book was released on 2016-04-14 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea of one's memory "filling up" is a humorous misconception of how memory in general is thought to work; it actually has no capacity limit. However, the idea of a "full brain" makes more sense with reference to working memory, which is the limited amount of information a person can hold temporarily in an especially accessible form for use in the completion of almost any challenging cognitive task. This groundbreaking book explains the evidence supporting Cowan's theoretical proposal about working memory capacity, and compares it to competing perspectives. Cognitive psychologists profoundly disagree on how working memory is limited: whether by the number of units that can be retained (and, if so, what kind of units and how many), the types of interfering material, the time that has elapsed, some combination of these mechanisms, or none of them. The book assesses these hypotheses and examines explanations of why capacity limits occur, including vivid biological, cognitive, and evolutionary accounts. The book concludes with a discussion of the practical importance of capacity limits in daily life. This 10th anniversary Classic Edition will continue to be accessible to a wide range of readers and serve as an invaluable reference for all memory researchers.

Download or read book The Role of Executive Functioning as a Mediator of Age related Differences in Free Recall Memory Performance written by Tara Lynn Victor and published by . This book was released on 2000 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mind Brain and Education Science A Comprehensive Guide to the New Brain Based Teaching written by Tracey Tokuhama-Espinosa and published by W. W. Norton & Company. This book was released on 2010-12-20 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Establishing the parameters and goals of the new field of mind, brain, and education science. A groundbreaking work, Mind, Brain, and Education Science explains the new transdisciplinary academic field that has grown out of the intersection of neuroscience, education, and psychology. The trend in “brain-based teaching” has been growing for the past twenty years and has exploded in the past five to become the most authoritative pedagogy for best learning results. Aimed at teachers, teacher trainers and policy makers, and anyone interested in the future of education in America and beyond, Mind, Brain, and Education Science responds to the clamor for help in identifying what information could and should apply in classrooms with confidence, and what information is simply commercial hype. Combining an exhaustive review of the literature, as well as interviews with over twenty thought leaders in the field from six different countries, this book describes the birth and future of this new and groundbreaking discipline. Mind, Brain, and Education Science looks at the foundations, standards, and history of the field, outlining the ways that new information should be judged. Well-established information is elegantly separated from “neuromyths” to help teachers split the wheat from the chaff in classroom planning, instruction and teaching methodology.

Download or read book Age Related Decline in Memory written by Jada J. Stewart and published by . This book was released on 2015 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aging and Context Effects in Working Memory written by James R. Houston and published by . This book was released on 2016 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well-accepted that higher level cognitive abilities exhibit the greatest declines with the aging process. One aspect of executive function, working memory, is no exception to this trend. Older adults demonstrate clear deficits in working memory function which coincide with different patterns of neural activation compared to younger adults. The reliability of these effects and the strong relationship between age-related working memory losses and losses in other areas of cognitive function have led researchers to propose working memory function as a driving factor behind the majority of age-related losses in cognitive function. However, by treating working memory as a core factor behind cognitive losses with aging, it diminishes the conceptualization of working memory as a highly complex concept in itself. Indeed, as researchers have proposed multiple working memory theories from cognitive, neural, and computational perspectives in an effort to unify and understand the structure and function of the system, pointing to working memory as an explanatory factor behind age-related losses in cognitive performance provides nominal value. In contrast, by examining the working memory system using a process approach that breaks down the component subprocesses of the working memory system, we can gain a better understanding of how and why the complex concept of working memory has such strong associations with age-related losses in cognitive function.The principal goal of this doctoral thesis was to examine the role played by one such subcomponent of the working memory process, context integration, in age-related differences in working memory performance. A multiple experiment study examined how younger and older adults integrated contextual information in a working memory task by manipulating the predictability of source information in a repetition detection working memory paradigm. Behavioral (accuracy and response time) and neurophysiological (EEG) measures were taken while participants engaged in two tasks to address potential age group differences in working memory encoding, retrieval, and context integration. Critically, this study was also one of the first to contrast the working memory theories of aging by using behavioral and direct physiological measures of functioning.Results from both experiments identified age-related losses in accuracy in the single-context control condition. These effects were replicated in the dual context conditions in Experiment 1, but not in Experiment 2. Results were interpreted as reflecting an age-related reduction in resource reserves that led to losses when the older adults' comparatively lower resource capacities were exceeded by task demands. ERP analyses suggested that these effects were associated with working memory access deficits with aging. Younger and older adult waveforms also differed in their spatial distributions across the scalp. While younger adults elicited more focal, posterior activities, older adults exhibited more widespread, and frontal activations. Context predictability did not influence the performance of either age group. We conclude that resource consumption is the most likely candidate to drive age group differences in working memory performance and that this difference is the result of age-related deficits in accessing offline working memory stores.

Download or read book Cognitive Aging written by Denise Park and published by Psychology Press. This book was released on 2012-12-06 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: As our society ages, the topic of cognitive aging is becoming increasingly important. This volume provides an accessible overview of how the cognitive system changes as a function of normal aging. Building on the successful first edition, this volume provide an even more comprehensive coverage of the major issues affecting memory, attention, language, speech and other aspects of cognitive functioning. The essential chapters from the first edition have been thoroughly revised and updated and new chapters have been introduced which draw in neuroscience studies and more applied topics. In addition, contributors were encouraged to ensure their chapters are accessible to students studying the topic for the first time. This therefore makes the volume appealing as a textbook on senior undergraduate and graduate courses.

Download or read book The Wiley Handbook of Cognitive Control written by Tobias Egner and published by John Wiley & Sons. This book was released on 2017-03-20 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering basic theory, new research, and intersections with adjacent fields, this is the first comprehensive reference work on cognitive control – our ability to use internal goals to guide thought and behavior. Draws together expert perspectives from a range of disciplines, including cognitive psychology, neuropsychology, neuroscience, cognitive science, and neurology Covers behavioral phenomena of cognitive control, neuroanatomical and computational models of frontal lobe function, and the interface between cognitive control and other mental processes Explores the ways in which cognitive control research can inform and enhance our understanding of brain development and neurological and psychiatric conditions

Download or read book Ageing and Episodic Memory written by Claire V. Killen and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the effect of normal ageing on the strategies adopted during episodic memory retrieval, using a combination of neuropsychological profiling and neuroimaging data measured during performance on a source memory exclusion task. The exclusion task is a type of source memory task where participants distinguish between targets (studied items from one source e.g. female voice), non-targets (studied items from another source e.g. male voice) and new items. Unlike a source memory task where three separate buttons are pressed for each item at test, in the exclusion task one button is pressed for targets and a second for non-target and new items. As this task is more complex than a normal source memory paradigm and also allows participants to perform the task in more than one way, it places high emphasis on the use of strategies to facilitate retrieval and is therefore ideal for investigating strategic retrieval. Previous source memory studies have shown that while older adults are reasonably good at recognising whether items are old or new, they show marked impairments at remembering the source in which items were presented at study. Dual process theories propose that the age-related decline in source memory occurs because recollection becomes impaired with ageing whereas familiarity remains relatively spared. The results reported in this thesis support dual process theory. Experiment 2a showed that, behaviourally, as expected, the young outperformed the elderly. Event-related potentials (ERPs), recorded while a source memory exclusion test was performed, revealed that both young and older adults showed bilateral frontal and left parietal old/new effects, thought to index familiarity and recollection respectively. Importantly, the magnitude of the left parietal effect was significantly reduced in the older adults. The ERP findings also suggested that dual process theories represent an oversimplification of episodic memory decline with age. In Experiment 1a, three temporally and topographically distinct late frontal old/new effects were present in the younger adults: a bilateral anterior frontal effect (450-900ms post stimulus), a right prefrontal effect (900-1300ms) and a right frontal effect (1300-2000ms). Significant positive correlations between the magnitude of these effects and performance on neuropsychological tests of executive functioning in Experiment 1b, revealed that the bilateral anterior frontal effect was related to working memory, strategy use and planning; the right prefrontal effect was related to working memory and planning while the right frontal effect was related to planning. By contrast, the older adults in Experiment 2a only produced the right frontal effect, which correlated with planning across all three time windows in Experiment 2c. Post-retrieval monitoring in older adults therefore appeared to be qualitatively different than their younger counterparts. Performance on the neuropsychological tests in Experiment 2b, revealed that the older adults' working memory and strategy use was impaired compared to the young, whereas planning was relatively intact, suggesting that age-related differences in post retrieval processing may be due to reduced executive functioning in older adults. Identifying distinct late frontal effects and demonstrating a relationship between these effects and specific executive functions is a novel finding. The presence of a left parietal target greater than non-target difference in the young adults from Experiment 1a and 2a was interpreted as the young reducing recollection of irrelevant non-target information. The modulation did not differ in magnitude for targets and non-targets in the elderly adults from Experiment 2a, suggesting they were less able to reduce activation of goal irrelevant non-target information. The results in the young adults from Experiment 1a also highlight the importance of considering the context of source information on the processes engaged at retrieval. The bilateral frontal effect was significant for the retrieval of the intrinsic context (source information inherent to the studied item), but not the extrinsic context (source information not inherent to the studied item). This finding was interpreted within a unitisation framework, where the intrinsic context became unitised with the item and enhanced familiarity based remembering. The findings also highlight that in order to fully understand post retrieval processing in both young and old adults, focus should move away from examining quantitative differences in the right frontal effect over long time periods and instead identify qualitatively distinct late frontal effects that may reflect the engagement of various executive functions over time.

Download or read book Cognitive Changes and the Aging Brain written by Kenneth M. Heilman and published by Cambridge University Press. This book was released on 2019-12-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the changes in the brain and in cognitive functions that occur with aging in the absence of a neurological, psychiatric, or medical disease. It discusses aging-related changes in many brain functions, including memory, language, sensory perception, motor function, creativity, attention, executive functions, emotions and mood. The neural mechanisms that may account for specific aging-related changes in cognition, perception and behavior are explored, as well as the means by which aging-related cognitive decrements can be managed and possibly ameliorated. Consequently, this book will be of value to clinicians, including neurologists, psychiatrists, geriatricians, primary care physicians, psychologists and speech-language pathologists. In addition, researchers and graduate students who want to learn about the aging brain will find this an indispensable guide.

Download or read book The Role of Inhibitory Functioning in Age related Working Memory Decline and the Moderating Effect of Time Course Changes in Inhibitory Functioning with Age written by Mervin Blair and published by . This book was released on 2014 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current thesis investigated whether and how inhibitory and working memory functioning change with age in the context of a sequential action paradigm. The approach taken was guided by (1) propositions that inhibitory functions decline with age and negatively impact higher order abilities, and (2) the utility of better understanding cognitive mechanisms underlying sequential activities. In Study 1, I examined the extent to which age-related decline in deletion-type inhibition (suppression of no-longer-relevant information) accounted for age differences in working memory performance. Unlike much of the prior research, I examined inhibitory changes with respect to working memory components (processing and storage). I observed that reduced deletion-type inhibition with age accounted for sizable proportions of age differences in working memory components, with significant findings in storage and marginal findings in processing components. This finding indicates that changes in executive function with age, such as inhibitory control, have direct implications for working memory functioning at the componential level. Moreover, given the observation of age-related decline in deletion-type inhibition in Study 1, a finding that has been inconsistent in the literature, in two subsequent studies I examined the nature of inhibitory changes with age. In particular, I examined whether compared to younger adults, older adults{u2019} have reduced ability to engage deletion-type inhibition in a timely manner, beyond the effects of age-related general slowing. In Study 2, I did not observe age differences in the time course of deletion-type inhibition when I examined erroneous responses to the prior, no-longer-relevant, item (n - 1 repeat). However, this finding may have been limited by low error rates obtained. Thus, in Study 3, response latencies on n - 1 repeats were examined for changes in low-level (unintentional) deletion-type inhibition across variable numbers of distractors, corresponding to variable time delays. Compared to younger adults, older adults had difficulty engaging deletion-type inhibition. This finding suggests that more detailed specification of inhibitory changes with age might depend on examining the temporal dynamics of inhibitory functioning in young and older adults. Taken together, this work highlights the important role of inhibitory functioning with age in higher order cognition (working memory) and emphasizes the utility of examining age effects in the time course of cognitive functions in sequential tasks.

Download or read book Age Related Changes During Adulthood in Cognitive Processes Reliant on the Pre frontal Cortex written by Jo-Anne Todd and published by . This book was released on 2011 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : The frontal lobe hypothesis of ageing proposes that cognitive functions associated with the prefrontal cortex (PFC) are more susceptible to age-related changes than those supported by other brain regions (e.g., Dempster, 1992; West, 1996). Age-related declines previously demonstrated in working memory (e.g., Bopp & Verhaeghen, 2005), inhibitory control (Dempster, 1992), executive attention (e.g., West, 2004) and fluid intelligence (Horn & Cattell, 1967), have been linked to changes in PFC functioning. Relational processing also depends on the integrity of the PFC (e.g., Christoff et al., 2001), but research on age-related declines in relational processing is limited (Andrews & Todd, 2008; Viskontas, Holyoak, & Knowlton, 2005; Viskontas, Morrison, Holyoak, Hummel, & Knowlton, 2004). Unlike previous research which tended to focus on a single construct, the current research investigated age-related changes in executive attention, inhibitory control, working memory and relational processing. Distinctions within three constructs were also of interest. Three aspects of inhibitory control (response inhibition, task-set switching and inhibition in memory retrieval) were examined. Relational processing was examined in four tasks, three of which involved items at two or more levels of complexity. Working memory was examined using simple span and complex span tasks. The test battery of 16 tasks assessed these constructs as well as speed of processing, crystallized and fluid intelligence, and frontal functioning (Tower of London). It was administered to a sample of 125 normally ageing adults who ranged in age from 18 years to 92 years with all age decades represented.

Download or read book Working Memory Efficacy and Aging written by Katherine Elizabeth Sanderson and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AbstractThe aim of this thesis is to examine the effects of age on visuo-spatial sketchpad (VSSP) slave system processes and central executive working memory processes within the context of the multicomponent working memory model originally proposed by Baddeley & Hitch (1974). Previous cognitive aging research has tended to use general measures of working memory and little evidence has examined the effects of age specifically within the context of the multicomponent model. A series of seven studies was undertaken utilising a quasi-experimental design. Data was collected from convenience samples of young and old adults for each study, using a range of tasks and measures designed to make demands on VSSP and central executive processes. Effects of age were examined independently of speed of processing and intelligence by using these as covariates in the statistical analysis. Data was analysed using a series of ANOVA and ANCOVA analyses. Findings indicated that old adults were equivalent to young adults in their performance on the VSSP slave system tasks. However they showed an impaired performance on some measures of central executive processing, but not others. In particular, older adults showed a decline in the executive processes of task switching, which cannot be explained by speed of processing; whereas other putative executive processes, such as inhibitory processes, did not show an age-related decline. Results indicated that the age-related decline in task switching at the specific switch point is only evident when the demands for active memory processing are high. An age-related decline in the ability to co-ordinate the two tasks during task switching was also evident, and this age difference was not dependent on the active memory demands. These findings suggest that there are a number of separable executive processes, not all of which decline with age. The findings are discussed in relation to models of cognitive aging and theoretical models of working memory.

Download or read book Memory Aging and the Brain written by Lars Bäckman and published by Psychology Press. This book was released on 2009-09-11 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together some of the best known experts in their fields to offer a cross-disciplinary summary of current research on human memory. More than this however, the book pays tribute to the work of Lars-Göran Nilsson and his many contributions to the psychology of human memory. The book is divided into three subsections: General Issues in Human Memory, Memory and Aging, and Memory and the Brain. These sections represent the three cornerstones in Lars-Göran's scientific career and comprise contributions from senior collaborators, colleagues and former students. Areas of discussion include: long-term and working memory: how do they interact? an epidemiological approach to cognitive health in aging the cognitive neuroscience of signed language Covering a broad range of topics, Memory, Aging and the Brain will be of great interest to all those involved in the study and research of human memory.

Download or read book Brain Aging written by David R. Riddle and published by CRC Press. This book was released on 2007-04-19 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recognition that aging is not the accumulation of disease, but rather comprises fundamental biological processes that are amenable to experimental study, is the basis for the recent growth of experimental biogerontology. As increasingly sophisticated studies provide greater understanding of what occurs in the aging brain and how these changes occur

Download or read book Cognition Language and Aging written by Heather Harris Wright and published by John Benjamins Publishing Company. This book was released on 2016-03-16 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age-related changes in cognitive and language functions have been extensively researched over the past half-century. The older adult represents a unique population for studying cognition and language because of the many challenges that are presented with investigating this population, including individual differences in education, life experiences, health issues, social identity, as well as gender. The purpose of this book is to provide an advanced text that considers these unique challenges and assembles in one source current information regarding (a) language in the aging population and (b) current theories accounting for age-related changes in language function. A thoughtful and comprehensive review of current research spanning different disciplines that study aging will achieve this purpose. Such disciplines include linguistics, psychology, sociolinguistics, neurosciences, cognitive sciences, and communication sciences. As of January 2019, this e-book is freely available, thanks to the support of libraries working with Knowledge Unlatched.

Download or read book Age and Prospective Memory written by Karen Klein Villa and published by . This book was released on 1997 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: