Mechanisms of Visual Search in Younger and Older Adults PDF Download

Author: Emily H. Trittschuh
Publisher:
ISBN:
Category : Neural networks (Neurobiology)
Languages : en
Pages : 136

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Author: Andrea Tales
Publisher: MDPI
ISBN: 3036509844
Category : Science
Languages : en
Pages : 142

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Book Description
Visual attention is essential for environmental interactions, but our ability to respond to stimuli gradually declines across the lifespan, and such deficits are even more pronounced in various states of cognitive impairment. Examining the integrity of related components, from elements of attention capture to executive control, will improve our understanding of related declines by helping to explain behavioural and neural effects, which will ultimately contribute towards our knowledge of the extent of dysfunctional attention processes and their impact upon everyday life. Accordingly, this Special Issue represents a body of literature that fundamentally advances insights into visual attention processing, featuring studies spanning healthy ageing, mild cognitive impairment, and dementia

Author: Paul Verhaeghen
Publisher: Oxford University Press
ISBN: 0199709378
Category : Psychology
Languages : en
Pages : 379

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Book Description
The Elements of Cognitive Aging provides a qualitative overview (mostly using graphical meta-analysis) of the vast literature on aging and speeded tasks-bringing together, for the first time, almost everything we know about aging and processing speed. The book investigates age-related slowing in elementary tasks (including updated parameters for the Aging Human Information Processor) and tasks of executive control (inhibition, task shifting, and task coordination). It examines regularities in the age-related effects of these tasks that might hint at underlying brain-related mechanisms, while having a keen eye for alternative explanations (such as increased caution with age). It models the course of speed-of-processing over the lifespan and investigates the influence of generational differences on mental speed. Finally, it examines the influence of age-related mental slowing on other aspects of cognition (working memory, executive control episodic memory, aspects of fluid intelligence), and provides the first systematic review of age-speed-cognition mediation in a longitudinal context.

Author: John Duncan
Publisher:
ISBN: 0198566425
Category : Medical
Languages : en
Pages : 417

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Book Description
What are the fundamental mechanisms of decision making, processing speed, memory and cognitive control? How do these give rise to individual differences, and how do they change as people age? How are these mechanisms implemented in neural unctions, in particular the functions of the frontal lobe? How do they relate to the demands of everyday, 'real life' behaviour? Over almost five decades, Pat Rabbitt has been among the most distinguished of British cognitive psychologists. His work has been widely influential in theories of mental speed, cognitive control and aging, influencing research in experimental psychology, neuropsychology and individual differences. This volume, dedicated to Pat Rabbitt, brings together a distinguished group of 16 contributors actively pursuing research in the fields of speed, memory, and control, and the application of these fields to individual differences and aging. With the latest work from senior figures in the field, and a focus on fundamental topics in both teaching and research, the book will be valuable to students and scientists in experimental psychology and cognitive neuroscience.

Author: Michael D. Dodd
Publisher: Springer Science & Business Media
ISBN: 1461447941
Category : Psychology
Languages : en
Pages : 225

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Book Description
The Influence of Attention, Learning, and Motivation on Visual Search will bring together distinguished authors who are conducting cutting edge research on the many factors that influence search behavior. These factors will include low-level feature detection; statistical learning; scene perception; neural mechanisms of attention; and applied research in real world settings.

Author: Harriet A. Allen
Publisher: Frontiers Media SA
ISBN: 2889199371
Category : Neurosciences. Biological psychiatry. Neuropsychiatry
Languages : en
Pages : 206

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Book Description
Healthy ageing can lead to declines in both perceptual and cognitive functions. Impaired perception, such as that resulting from hearing loss or reduced visual or tactile resolution, increases demands on ‘higher-level’ cognitive functions to cope or compensate. It is possible, for example, to use focused attention to overcome perceptual limitations. Unfortunately, cognitive functions also decline in old age. This can mean that perceptual impairments are exacerbated by cognitive decline, and vice versa, but also means that interventions aimed at one type of decline can lead to improvements in the other. Just as improved cognition can ameliorate perceptual deficits, improving the stimulus can help offset cognitive deficits. For example, making directions and routes easy to follow can help compensate for declines in navigation abilities. In this Topic, we bring together papers from both auditory and visual researchers that address the interaction between perception and cognition in the ageing brain. Many of the studies demonstrate that a broadening of representations or increased reliance on gist underlie perceptual and cognitive age-related declines. There is also clear evidence that impaired perception is associated with poor cognition although, encouragingly, it can also be seen that good perception is associated with better cognition. Compensatory cognitive strategies were less successful in improving perception than might be expected. We also present papers which highlight important methodological considerations that are required when studying the older brain.

Author: Werner X. Schneider
Publisher: Psychology Press
ISBN: 9780863779817
Category : Psychology
Languages : en
Pages : 322

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Book Description
In order to produce coherent behaviour in a complex world, forms of visual attention are necessary in order for us to select appropriate objects for action. Over the past ten years, there have been considerable advances in research into visual attention, with many of these advances linked to interdisciplinary research in experimental psychology, neuropsychology, neurophysiology and functional imaging. This work has begun to allow us to understand not only the functional properties of visual attention, but also how attentional processes are localized in the brain: the cognitive neuroscience of visual attention. This special issue draws together research from leading figures in this field, to highlight recent progress in understanding how selective processes operate in perception and action.

Author: Junfeng Sun
Publisher: Frontiers Media SA
ISBN: 2889454169
Category :
Languages : en
Pages : 170

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Book Description
Old adults undertake multiple reduced cognitive abilities in aging, which are accompanied with specific brain reorganization in forms of regional brain activity and brain tissues, inter-region connectivity, and topology of whole brain networks in both function and structure. The plasticity changes of brain activities in old adults are explained by the mechanisms of compensation and dedifferentiation. For example, older adults have been observed to have greater, usually bilateral, prefrontal activities during memory tasks compared to the typical unilateral prefrontal activities in younger adults, which was explained as a compensation for the reduced brain activities in visual processing cortices. Dedifferentiation is another mechanism to explain that old adults are with much less selective and less distinct activity in task-relevant brain regions compared with younger adults. A larger number of studies have examined the plasticity changes of brain from the perspective of regional brain activities. However, studies on only regional brain activities cannot fully elucidate the neural mechanisms of reduced cognitive abilities in aging, as multiple regions are integrated together to achieve advanced cognitive function in human brain. In recent years, brain connectivity/network, which targets how brain regions are integrated, have drawn increasing attention in neuroscience with the development of neuroimaging techniques and graph theoretical analysis. Connectivity quantifies functional association or neural fibers between two regions that may be spatially far separated, and graph theoretical analysis of brain network examines the complex interactions among multiple regions from the perspective of topology. Studies showed that compared to younger adults, older adults had altered strength of task-relevant functional connectivity between specific brain regions in cognitive tasks, and the alternation of connectivity are correlated to behavior performance. For example, older adults had weaker functional connectivity between the premotor cortex and a region in the left dorsolateral prefrontal cortex in a working memory task. Interventions like cognitive training and neuro-modulation (e.g., transcranial magnetic stimulation) have been shown to be promising in regaining or retaining the decreasing cognitive abilities in aging. However, only few neuroimaging studies have examined the influence of interventions to old adult’s brain activity, connectivity, and cognitive performance. This Research Topic calls for contributions on brain network of subjects in normal aging or with age-related diseases like mild cognitive impairment and Alzheimer’s disease. The studies are expected to be based on neuroimaging techniques including but not limited to functional magnetic resonance imaging, Electroencephalography, and diffusion tensor imaging, and contributions on the influence of interventions to brain networks in aging are highly encouraged. All these studies would enrich our understanding of neural mechanisms underlying aging, and offer new insights for developing possible interventions to retain cognitive abilities in aging subjects.

Author: Carrick C. Williams
Publisher:
ISBN:
Category : Eye
Languages : en
Pages : 234

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Author: Chaoxiong Ye
Publisher: Frontiers Media SA
ISBN: 2832531970
Category : Science
Languages : en
Pages : 177

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