期刊
COGNITIVE SYSTEMS RESEARCH
卷 67, 期 -, 页码 66-72出版社
ELSEVIER
DOI: 10.1016/j.cogsys.2020.12.003
关键词
Selective attention; Inhibition; Foraging; Embodied cognition
资金
- H2020 Research and Innovation program [787061]
- ERC H2020 [840052]
- H2020-Research and Innovation action EU.3.1.5.3 [826421]
- H2020-EU.2.1.5.1 [820742]
- H2020 Societal Challenges Programme [787061] Funding Source: H2020 Societal Challenges Programme
- European Research Council (ERC) [840052] Funding Source: European Research Council (ERC)
This study investigates the comparison between inhibitory and excitatory mechanisms of top-down attention, finding evidence that these mechanisms complement each other in informing decision-making.
Selective attention informs decision-making by biasing perceptual processing towards task-relevant stimuli. In experimental and computational literature, this is most often implemented through top-down excitation of selected stimuli. However, physiological and anatomical evidence shows that in certain situations, top-down signals could instead be inhibitory. In this study, we investigated how such an inhibitory mechanism of top-down attention compares with an excitatory one. We did so in a neurorobotics context where the agent was controlled using an established hierarchical architecture. We augmented the architecture with an attentional system that implemented top-down attention biasing as connection gains. We tested four models of top-down attention on the simulated agent performing a foraging task: without top-down biasing, with only excitatory top-down gain, with only inhibitory top-down gain, and with both excitatory and inhibitory top-down gain. We manipulated the reward-distractor ratio that was presented and assessed the agent's performance using accumulated rewards and the latency of the selection. Using these measures, we provide evidence that excitatory and inhibitory mechanisms of attention complement each other. (C) 2020 The Authors. Published by Elsevier B.V.
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