Topic
Elementary cognitive task
About: Elementary cognitive task is a research topic. Over the lifetime, 4163 publications have been published within this topic receiving 192791 citations.
Papers published on a yearly basis
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Papers
TL;DR: This study constitutes, to the knowledge, the first resting-state connectivity analysis of the default mode and provides the most compelling evidence to date for the existence of a cohesive default mode network.
Abstract: Functional imaging studies have shown that certain brain regions, including posterior cingulate cortex (PCC) and ventral anterior cingulate cortex (vACC), consistently show greater activity during resting states than during cognitive tasks. This finding led to the hypothesis that these regions constitute a network supporting a default mode of brain function. In this study, we investigate three questions pertaining to this hypothesis: Does such a resting-state network exist in the human brain? Is it modulated during simple sensory processing? How is it modulated during cognitive processing? To address these questions, we defined PCC and vACC regions that showed decreased activity during a cognitive (working memory) task, then examined their functional connectivity during rest. PCC was strongly coupled with vACC and several other brain regions implicated in the default mode network. Next, we examined the functional connectivity of PCC and vACC during a visual processing task and show that the resultant connectivity maps are virtually identical to those obtained during rest. Last, we defined three lateral prefrontal regions showing increased activity during the cognitive task and examined their resting-state connectivity. We report significant inverse correlations among all three lateral prefrontal regions and PCC, suggesting a mechanism for attenuation of default mode network activity during cognitive processing. This study constitutes, to our knowledge, the first resting-state connectivity analysis of the default mode and provides the most compelling evidence to date for the existence of a cohesive default mode network. Our findings also provide insight into how this network is modulated by task demands and what functions it might subserve.
6,782 citations
Book•
13 Mar 1986
TL;DR: This book discussesMeta-Theoretical Issues and Perspectives, a meta-theoreticalPrinciples of Representation, and its Applications, a Practical Guide to Bilingual Cognitive Representation.
Abstract: This work presents a systematic analysis of the psychological phenomena associated with the concept of mental representations--also referred to as cognitive or internal representations. A major restatement of a theory the author developed in his 1971 book, Imagery and Verbal Processes, it covers phenomena from the earlier period that remain relevant today but emphasizes cognitive problems and paradigms that have since emerged more fully. The author proposes that performance in memory and other cognitive tasks is mediated not only by linguistic processes but also by a distinct nonverbal imagery model of thought as well. He discusses the philosophy of science associated with the dual coding approach, emphasizing the advantages of empiricism in the study of cognitive phenomena and showing that the fundamentals of the theory have stood up well to the empirical challenges over the years. An important contribution to the understanding of form and function of human knowledge, this book will be of interest to students and researchers in cognitive psychology, cognitive science, linguistics, and philosophy.
5,106 citations
Posted Content•
TL;DR: This article found that computer capital substitutes for workers in performing cognitive and manual tasks that can be accomplished by following explicit rules, and complements workers in non-routine problem-solving and complex communications tasks.
Abstract: We apply an understanding of what computers do to study how computerization alters job skill demands. We argue that computer capital (1) substitutes for workers in performing cognitive and manual tasks that can be accomplished by following explicit rules; and (2) complements workers in performing nonroutine problem-solving and complex communications tasks. Provided these tasks are imperfect substitutes, our model implies measurable changes in the composition of job tasks, which we explore using representative data on task input for 1960 to 1998. We find that within industries, occupations and education groups, computerization is associated with reduced labor input of routine manual and routine cognitive tasks and increased labor input of nonroutine cognitive tasks. Translating task shifts into education demand, the model can explain sixty percent of the estimated relative demand shift favoring college labor during 1970 to 1998. Task changes within nominally identical occupations account for almost half of this impact.
4,505 citations
TL;DR: The analysis shows that cognitive load is a central consideration in the design of multimedia instruction because it exceeds the learner's available cognitive capacity.
Abstract: First, we propose a theory of multimedia learning based on the assumptions that humans possess separate systems for processing pictorial and verbal material (dual-channel assumption), each channel is limited in the amount of material that can be processed at one time (limited-capacity assumption), and meaningful learning involves cognitive processing including building connections between pictorial and verbal representations (active-processing assumption). Second, based on the cognitive theory of multimedia learning, we examine the concept of cognitive overload in which the learner's intended cognitive processing exceeds the learner's available cognitive capacity. Third, we examine five overload scenarios. For each overload scenario, we offer one or two theory-based suggestions for reducing cognitive load, and we summarize our research results aimed at testing the effectiveness of each suggestion. Overall, our analysis shows that cognitive load is a central consideration in the design of multimedia instru...
4,113 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 8 |
| 2024 | 7 |
| 2023 | 26 |
| 2022 | 50 |
| 2021 | 253 |
| 2020 | 238 |