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Rudy van den Brink
Postdoc at UKE hamburg in the
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Rudy van den Brink proslijedio/la je tweet
Niklas Wilming 18 h
New preprint about choice predictive feedforward/back signals in V1 (). Joint work with an amazing group of people: , Florent Meyniel and Tobias Donner. And of course !
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Rudy van den Brink 4. velj
Odgovor korisniku/ci @BenediktEhinger
Thanks a lot!
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Rudy van den Brink proslijedio/la je tweet
KDesender 4. velj
Hurray! The Confidence Database is officially out now! Great initiative by . Curious to see what this will bring :)
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Rudy van den Brink proslijedio/la je tweet
bioRxiv Neuroscience 1. velj
Temporal expectation hastens sensory encoding but does not affect evidence quality
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @k_tsetsos @AvHStiftung @ERC_Research
Our findings thus highlight how temporal predictions optimize our interaction with unfolding sensory events: by reducing sensory encoding time. Thanks to for helpful comments, and and for funding! (10/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
Where might fluctuations in sensory encoding originate? Anticipatory alpha power was modulated by expectations, and tracked both response-time and CPP onset. This may reflect fluctuations in top-down signaling in accordance with expectations about target onset (9/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
These results strongly support an account in which temporal expectation enhances task performance specifically by shortening the time needed for sensory encoding, and not by affecting the decision process (besides its onset) (8/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
Again supporting account 1, at the single-trial level, temporal expectation reduced onset, but did not affect slope. Difficulty did affect slope, as expected (so results are not just due to a difference in sensitivity between slope/onset). (7/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
We then looked at an EEG marker of evidence accumulation during decision making tasks: the CPP. Its onset and slope showed expected scaling with RT (faster onset and steeper slope for fast responses). We could then examine the effect of expectation on CPP onset and slope (6/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
When we applied the drift diffusion model to the behavioral data, we found evidence for account 1: non-decision time (Ter) was reduced when people expected a target. Drift rate (v) was affected by task difficulty (as predicted), but not by expectation. (5/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
We manipulated expectation about the onset of a dim visual target using the temporal cueing paradigm: when an auditory cue validly signaled target onset after a short delay, people responded faster compared to when the cue invalidly signaled a long delay (4/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
Previous work has arrived at different conclusions about account 1 versus 2, potentially due to systematic discrepancies between conclusions based on sequential-sampling models and neural signatures of decision formation. Here, we thus used both approaches. (3/10)
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Rudy van den Brink 3. velj
Odgovor korisniku/ci @rudyvdbrink
Temporal expectation could enhance perception though (1) expedited sensory evidence encoding, or (2) an increase in the quality of sensory evidence (the latter is equivalent to the mean accumulation rate under most computational frameworks for decision-making). (2/10)
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Rudy van den Brink 3. velj
New out on ! \w , , Nicole de Ru & Sander Nieuwenhuis, we show that temporal expectation enhances perception by speeding up the the decision process onset without affecting its evolution! below (1/10)
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Rudy van den Brink proslijedio/la je tweet
Donner Lab 31. sij
Interested in decision-making, evidence accumulation, normative or circuit models, oscillations, cortical hierarchy, feedback, or brainstem arousal systems? Check out our new paper on ()! Led by , summary below. (1/11)
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Rudy van den Brink 31. sij
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Rudy van den Brink 31. sij
Highly recommended!
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Rudy van den Brink proslijedio/la je tweet
Alex Naka 26. sij
This looks pretty interesting Neurons in Visual Cortex are Driven by Feedback Projections when their Feedforward Sensory Input is Missing
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Jess Cardin 22. sij
Nice review by and Anita Disney (not on Twitter?) this week in on the diversity of scales of cortical cholinergic signaling! We're thinking a lot about this topic lately in the lab.
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Rudy van den Brink proslijedio/la je tweet
Anne Urai 20. sij
I'm very proud and excited to present to you: a team science approach to reproducibly studying decision-making! Want to know what it's been like to work on this? Behind-the-scenes 🧵👇 1/many
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