Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Tobias Sommer"'
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-17 (2023)
Abstract Memories undergo a time-dependent neural reorganization, which is assumed to be accompanied by a transformation from detailed to more gist-like memory. However, the nature of this transformation and its underlying neural mechanisms are large
Externí odkaz:
https://doaj.org/article/c084d9714bbd4998ac7d001b4f5e96d0
Autor:
Karima Chakroun, Antonius Wiehler, Ben Wagner, David Mathar, Florian Ganzer, Thilo van Eimeren, Tobias Sommer, Jan Peters
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-14 (2023)
Abstract Dopamine fundamentally contributes to reinforcement learning, but recent accounts also suggest a contribution to specific action selection mechanisms and the regulation of response vigour. Here, we examine dopaminergic mechanisms underlying
Externí odkaz:
https://doaj.org/article/6fb6176da3044439b1fa6b57fcb8cae7
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021)
Memories are assumed to undergo a time-dependent systems consolidation, during which hippocampal contributions to memory decrease while neocortical contributions increase. Here, the authors show that noradrenergic arousal after encoding may reverse t
Externí odkaz:
https://doaj.org/article/7d0c8420029a47dda636bdc1c70621bd
Publikováno v:
Frontiers in Behavioral Neuroscience, Vol 14 (2020)
In humans, monetary reward can promote behavioral performance including response times, accuracy, and subsequent recognition memory. Recent studies have shown that the dopaminergic system plays an essential role here, but the link to interindividual
Externí odkaz:
https://doaj.org/article/7cb0ccc44d974e50938a64dbb1fbe450
Publikováno v:
NeuroImage, Vol 206, Iss , Pp 116294- (2020)
In verbal creative problems like compound remote associates (CRAs), the solution is semantically distant and there is no predefined path to the solution. Therefore, people first search through the space of possible solutions before retrieving the cor
Externí odkaz:
https://doaj.org/article/05e5f052c7d7406f97ba382d49ac51b4
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-12 (2018)
While estrogen is known to change hippocampal activity in animals, it is not known if this effect extends to humans. Here, authors vary the doses of estrogen in young women and show that the effects on hippocampal activity can be described by linear
Externí odkaz:
https://doaj.org/article/c95a1e8caad84622a86c4f6c3e3895fa
Publikováno v:
PLoS ONE, Vol 13, Iss 6, p e0199013 (2018)
During incidental learning statistical regularities are extracted from the environment without the intention to learn. Acquired implicit memory of these regularities can affect behavior in the absence of awareness. However, conscious insight in the u
Externí odkaz:
https://doaj.org/article/1b4f400f130b4a98810aad08f0fef2fb
Publikováno v:
Frontiers in Psychology, Vol 8 (2018)
Pictorial stimuli can vary on many dimensions, several aspects of which are captured by the term ‘visual complexity.’ Visual complexity can be described as, “a picture of a few objects, colors, or structures would be less complex than a very co
Externí odkaz:
https://doaj.org/article/816b9b69260d438b837476a57c9e6a8d
Publikováno v:
PLoS ONE, Vol 8, Iss 3, p e54324 (2013)
Activity in the ventral striatum has frequently been associated with retrieval success, i.e., it is higher for hits than correct rejections. Based on the prominent role of the ventral striatum in the reward circuit, its activity has been interpreted
Externí odkaz:
https://doaj.org/article/512d65b870af4950885ff8fdea752745
We investigate multiarmed bandits with delayed feedback, where the delays need neither be identical nor bounded. We first prove that "delayed" Exp3 achieves the $O(\sqrt{(KT + D)\ln K} )$ regret bound conjectured by Cesa-Bianchi et al. [2019] in the
Externí odkaz:
http://arxiv.org/abs/1906.00670