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Elisabeth Parés Pujolràs

@epares.bsky.social
215 followers 405 following 25 posts

Cognitive Neuroscience postdoc @ucddublin, previously @UCL_ICN. Interested in the science & philosophy of decision making, voluntary action and consciousness.

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Elisabeth Parés Pujolràs @epares.bsky.social · 21/06/2026
... and this is for people who *did* have advanced skills to begin with. It is important for students to realise you should demand an education that teaches *you* how to learn, understand and do things, rather than cheating you out of this opportunity www.nature.com/articles/d41...
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Steph Bickel @stephanbickel.bsky.social · 18/06/2026
New research assistant position available in our human intracranial EEG lab in NY (hbmlab-nyc.com). DM or email me if you're interested to learn more!
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neuromurphy.bsky.social @neuromurphy.bsky.social · 28/05/2026
Come join the lab @maynoothuniversity.ie and work with me and stellar collaborators @seanfw.bsky.social and @redmondoconnell.bsky.social! Exciting project at the intersection of multi-task RNNs, compositional cognition and human decision neuroscience. Details and how to apply at shorturl.at/FsTQ0
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Elisabeth Parés Pujolràs @epares.bsky.social · 11/05/2026
A reviewer's job is to engage with all the complex nuances of actual thoughts, which convey *someone else's* interpretation of the world. Human effort should only be spent understanding human work. Else we will soon be asked to accept that AI-based tools "evaluate" our work - as if they could.
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Elisabeth Parés Pujolràs @epares.bsky.social · 11/05/2026
Poorly-phrased thoughts and also mistaken ones can drive science forward. When reading those, a reviewer can ask: "what do you *mean*?" and a discussion can ensue. But a reviewer cannot ask for the meaning or assess the value of an LLM-generated shell of a sentence, because it contains none.
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Elisabeth Parés Pujolràs @epares.bsky.social · 11/05/2026
No reviewer should have to waste any time trying to make sense of something that was not actually *thought* by someone else. LLMs produce stuff that *looks* sensible, but is an empty shell.
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Charles Logan @charleswlogan.bsky.social · 20/03/2026
Solidarity with Emily Tucker and her open letter to students. Tucker writes, "But the great thing is, you don’t have to go along with this, and I urge you not to. You can refuse to use the chatbot. You can tell your professors that you don’t want them to use it or to require you to use it."
medium.com
An Open Letter to Georgetown Students, In Response to Recent Announcements about "Generative AI"
Image source: Bibliothèque nationale de France An Open Letter to Georgetown Students, In Response to Recent Announcements by the University about “Generative AI” Dear students, As you know, in …
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Elisabeth Parés Pujolràs @epares.bsky.social · 18/03/2026
"If everyone thinks technological trends are inescapable, they probably will become so. That is why those serious about the human prospect should reject the rhetoric of fatalism and demand something more substantial."
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Elisabeth Parés Pujolràs @epares.bsky.social · 18/03/2026
...and for those who argue that this transformation is "unavoidable": www.technologyreview.com/1998/03/01/2...
technologyreview.com
Prophets of Inevitability
Human choices–not immutable forces of nature–govern the development and adoption of technologies.
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Elisabeth Parés Pujolràs @epares.bsky.social · 18/03/2026
Strong agree - doing things faster is not doing them better. Especially if you're not doing them at all. I too refuse to join that ship and agree we should fight to change flawed incentive systems rather than cave to them by slowly surrendering our ability to think for ourselves.
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Gabriel Weindel @gweindel.bsky.social · 13/03/2026
Pressure to use genAI for #ECR is quite high, I feel it weekly... ethical, ecological, economical, privacy- and cognitive-related worries keeps me from joining that ship. I need more time to research not something that creates the illusion of reasoning, if that costs grants or positions, let it be.
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Andrew Perfors @perfors.net · 27/02/2026
This whole thread is a very important insight as to why getting information from an LLM, even if you are dutiful and vigilant, corrodes your ability to ascertain what is true or not ** LLMs do not provide the info you need in order to evaluate truth. **
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kiemohr.bsky.social @kiemohr.bsky.social · 26/02/2026
Very happy to share this new paper, published in @elife.bsky.social, the last one stemming from a PhD chapter 🥲. In it, @spk3lly.bsky.social and I show that an early V1 signal (the C1) can have direct influence on a perceptual decision. Here's the link: doi.org/10.7554/eLif...
doi.org
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Redmond O'Connell @redmondoconnell.bsky.social · 26/02/2026
Check out our new paper which isolates a human brain signal that specifically tracks the growing urgency to commit to a choice pubmed.ncbi.nlm.nih.gov/41611534/. This one was a long time coming! Sterling work from @harveymccone.bsky.social and a bunch of past lab members!
pubmed.ncbi.nlm.nih.gov
A Movement-Independent Signature of Urgency During Human Perceptual Decision Making - PubMed
How does the brain adjust its decision processes to ensure timely decision completion? Computational modelling and electrophysiological investigations have pointed to dynamic 'urgency' processes that serve to progressively reduce the quantity of evidence required to reach choice commitment as time e …
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BAMB! @bamb-school.bsky.social · 12/02/2026
Applications for BAMB! 2026 are officially open! Join us in Barcelona (July 12–23) to master the art of behavioral modeling with our incredible faculty: @meganakpeters.bsky.social @marcelomattar.bsky.social @khamascience.bsky.social @thecharleywu.bsky.social Apply now here: www.bambschool.org
bambschool.org
BAMB! 2026 | Barcelona Summer School for Advanced Modeling of Behavior
Intensive training for experienced researchers in cognitive science, computational neuroscience and neuro-AI. Five interconnected modules, expert faculty, hands-on projects. July 12-23, 2026.
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Maarten Paulusse @maartenp.bsky.social · 24/02/2026
Tired of AI hype posts? You might like my sober assessment of whether AI-generated summaries are suitable for studying and research. Spoiler alert, they are not. The text is primarily aimed at students and researchers, but has much broader relevance. So share freely!: www.tue.nl/en/our-unive...
tue.nl
Are AI-generated summaries suitable for studying and research?
Despite didactic, ethical, and environmental concerns, the use of GenAI is on the rise in academia. For most applications, the jury is still out on whether and how they will benefit education and rese...
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Michael Pereira @meaperei.bsky.social · 24/02/2026
#hiring Come work with us to better understand the neuronal mechanism underlying perceptual consciousness! 18 months postdoctoral position at INSERM in Grenoble, France. ⌛Application deadline 10 March 2026. euraxess.ec.europa.eu/jobs/408445
euraxess.ec.europa.eu
Postdoctoral researcher on single neuron recordings for consciousness
Contract period: 18 monthsExpected date of employment: June 2026Proportion of work: Full timeSalary: according to INSERM scales (~2900 – 3300 € gross / month based on experience)Desired level of educa...
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Joao Barbosa @jbarbosa.org · 27/01/2026
Postdoc position in Paris: come help develop new generation human brain computer interfaces ⚡🧠💻 Interested? Contact me if you have experience with machine learning (e.g. simulation-based inference, RL, generative/diffusion models) or dynamical systems. See below for + details and retweet 🙏
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Armin Lak @laklab.bsky.social · 05/01/2026
New preprint. We show that in addition to reward prediction errors (RPEs), dorsal striatal dopamine signals encode sensory prediction errors (SPEs), the difference between sensory prior & observed stimulus. www.biorxiv.org/content/10.6...
biorxiv.org
Dorsal striatal dopamine integrates sensory and reward prediction errors to guide perceptual decisions
Perceptual decisions are shaped by expectations about sensory stimuli and rewards, learned through sensory and reward prediction errors. Dopamine is known to convey reward prediction errors that shape...
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Sarah Garfinkel @sarahgarf.bsky.social · 24/11/2025
** Recruiting a postdoc ** We are looking for a postdoc to work on emotion, mental health, and interoception, based in London at @ucl.ac.uk in my lab (Clinical and Affective Neuroscience). Part of a large Wellcome Grant (co-led with the brilliant @camillanord.bsky.social)
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François Stockart @francoisstock.bsky.social · 29/09/2025
Our #sEEG study is now published in Nature Communications: rdcu.be/eIkoG! 🧠 Key finding: We discovered neural evidence accumulation for visual perception that's independent of report preparation—recorded from >3000 channels across 3 experiments! #Neuroscience #Consciousness #OpenAccess
rdcu.be
Cortical evidence accumulation for visual perception occurs irrespective of reports
Nature Communications - Perception can occur in the absence of report. Here, the authors use intracranial recordings to show that sequential sampling of sensory evidence in the ventral visual...
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
Overall, our results highlight how prominent neural decision signals may take different shapes in different contexts, and how probing them using tasks that depart from conventional ones can provide important insights into their functional roles. Thanks for reading this far!
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
These results align with recent work in an expanded judgement task under volatility, where the CPP following individual tokens shows transient evoked activities that scale with context-optimal belief updates: www.nature.com/articles/s41...
nature.com
Dissociable encoding of evolving beliefs and momentary belief updates in distinct neural decision signals - Nature Communications
People are capable of making near-optimal decisions in volatile, changing environments. Here, the authors show how two neural decision signals encode distinct aspects of the belief updating process underpinning such adaptive decisions.
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
A simple bounded accumulation model could capture the key behavioural patterns in our data, and model-based simulations were able to reproduce the condition-specific profiles of the neural data (CPP & MBL) following each pulse 👇
Model-based simulated EEG data
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
Our participants sometimes terminated decisions early, tending to use the second pulse less than the first one, and CPP amplitudes following each pulse reflected this differential weight on choice (i.e. small CPP, small weight on choice), also capturing condition-specific differences in the effect.
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
This transient pattern of activity stands in contrast to motor beta lateralisation (MBL), which keeps track of the total sum of accumulated evidence throughout the intervals between pulses and until response.
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
We show that when noisy evidence for a single decision comes in temporally separate pulses, the centroparietal positivity (CPP) tracks multiple rounds of evidence accumulation, falling back down to baseline during the intervals in between pulses when no relevant info is presented.
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Elisabeth Parés Pujolràs @epares.bsky.social · 26/09/2025
Check out our reviewed preprint, now out in eLife! With @spk3lly.bsky.social, @redmondoconnell.bsky.social and Anna Geuzebroek elifesciences.org/reviewed-pre... While we work on improving the [solid] paper based on the reviews, here are the key take-home messages:
elifesciences.org
Perceptual glimpses are locally accumulated and globally maintained at distinct processing levels
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Kobe Desender @kobedesender.bsky.social · 19/09/2025
Common neural choice signals reflect accumulated evidence, not confidence! Now out in @cerebralcortex.bsky.social w @helenevanmarcke.bsky.social @pierreledenmat.bsky.social @yfvisser.bsky.social @denizerdil.bsky.social a.o. Paper: desenderlab.com/wp-content/u... Thread ↓↓↓
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Gabriel Weindel @gweindel.bsky.social · 15/09/2025
Will you be at #ICON2025 in Porto? Then drop at our symposium on "Decision Signal(s) In The Electro-encephalogram" (SY23, Thursday at 13.45) with @redmondoconnell.bsky.social @nunezanalyzed.bsky.social @tarrynbalsdon.bsky.social @hcp4715.bsky.social organized by Leendert van Maanen and Jelmer Borst
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Elisabeth Parés Pujolràs @epares.bsky.social · 15/09/2025
Excited to be in Porto for #ICON2025! I will be at poster session 2 tomorrow (Tuesday) afternoon (P2.20) talking about evidence accumulation and choice-encoding centroparietal signals in the human EEG. Come say hi!
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Mariana Babo-Rebelo @mbaborebelo.bsky.social · 15/09/2025
📢Fully Funded PhD position in Barcelona! I'm excited to announce that I’m opening a PhD position at @idibaps.bsky.social, Barcelona! We'll investigate the role of bodily signals in autobiographical memory, using virtual reality, EEG and TMS, in healthy volunteers and patient populations.
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Elisabeth Parés Pujolràs @epares.bsky.social · 13/09/2025
Excellent piece. We know how to improve writing ability: it's by doing more, not less of it. "LLMs do not improve one’s writing ability much like taking a taxi does not improve one’s driving ability. Students should hone their writing, thinking, and other academic skills at every opportunity."
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International Brain Laboratory @intlbrainlab.bsky.social · 03/09/2025
Two flagship papers from the International Brain Laboratory, now out in ‪@Nature.com‬: 🧠 Brain-wide map of neural activity during complex behaviour: doi.org/10.1038/s41586-025-09235-0 🧠 Brain-wide representations of prior information in mouse decision-making: doi.org/10.1038/s41586-025-09226-1 +
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Simon Kelly @spk3lly.bsky.social · 21/08/2025
New paper from the lab indicates some surprising differences in visual cortical contributions to two popular VEP types. In it, Kieran uses some of his brilliant tricks from last year's paper:
direct.mit.edu
Visual cortical area contributions to the transient, multifocal and steady-state VEP: A forward model-informed analysis
Abstract. Central to our understanding of how visual-evoked potentials (VEPs) contribute to visual processing is the question of where their anatomical sources are. Three well-established measures of ...
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Simon Kelly @spk3lly.bsky.social · 21/08/2025
Check out our new multisensory decision study! We tackle a decades-old Q: does faster detection of bimodal targets come from a race or co-activation between modalities? And also a vital, orthogonal Q: is it one decision process or two? A1: co-activation A2: two! Read here: rdcu.be/eASYd
rdcu.be
Distinct audio and visual accumulators co-activate motor preparation for multisensory detection
Nature Human Behaviour - Egan et al. examine multisensory evidence accumulation and show that auditory and visual evidence is accumulated in distinct processes during multisensory detection, and...
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Elisabeth Parés Pujolràs @epares.bsky.social · 12/08/2025
A timely reminder that not everything can be outsourced - writing is thinking www.nature.com/articles/s44...
nature.com
Writing is thinking - Nature Reviews Bioengineering
On the value of human-generated scientific writing in the age of large-language models.
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Paul Linton @lintonvision.bsky.social · 10/08/2025
CONVERSATIONS ON CONSCIOUSNESS How the CCN Community Can Contribute #CCN2025 on Wednesday 13th (10am 🇪🇺) Livestream link below ➡️ Exploring the possibility of Computational Consciousness Science ➡️ Discussing three Templeton World Charity Foundation Adversarial Collaborations
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kiemohr.bsky.social @kiemohr.bsky.social · 29/07/2025
Delighted to share this paper, now published in @arvoinfo.bsky.social. With @spk3lly.bsky.social‬ and Anna Geuzebroek we explored differences in visual cortical responses for pattern pulses and pattern reversals. Here's the link: jov.arvojournals.org/article.aspx...
jov.arvojournals.org
Pattern-pulses and pattern-reversals evoke different cascades of cortical sources in the multifocal visual evoked potential | JOV | ARVO Journals
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O'Connell Lab @connelllab.bsky.social · 01/07/2025
1/3 Check out our new commentary bsky.app/profile/imag....
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John P Grogan @johnpgrogan1.bsky.social · 10/06/2025
Our newest preprint is out (doi.org/10.1101/2025.06.05.658071), with @lucvermeylen.bsky.social,Dasha Monakhovych, Cameron McCabe, Sarah-Louise Mannion, @kobedesender.bsky.social, @redmondoconnell.bsky.social, comparing post-decision confidence models against behaviour and neural decision signals...
doi.org
Neurally-informed modelling unravels a single evidence accumulation process for choices and subsequent confidence reports
Subjective confidence in perceptual choices depends on computations occurring prior to and after choice commitment. However, the nature of these computations remains unclear. Current models disagree o...
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
We believe our results hint at a flexible neural architecture that can adapt to different decision contexts, and highlight how the CPP may play a key intermediary role in adaptive evidence accumulation. Stay tuned for upcoming related work, and thanks for reading!
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
The way that the CPP behaves in this task seems very different from its well-established characteristics in static contexts with continuous evidence (e.g. classic random dot motion tasks), where it reflects the absolute cumulative sum of evidence.
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
Further, we found that the centroparietal positivity (CPP) tracks effective evidence (i.e. it reflects how much a DV changes following a token, rather than just stimulus information), but it does not keep a sustained representation of the DV.
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
We found that motor beta lateralisation kept track of an evolving decision variable (DV) in a sustained manner over trial time, consistent with previous MEG work: www.nature.com/articles/s41...
nature.com
Adaptive circuit dynamics across human cortex during evidence accumulation in changing environments - Nature Neuroscience
Optimal decision making in a changing world requires non-linear evidence accumulation. Murphy et al. report signatures of this adaptive computation in recurrent dynamics of human parietal and motor co...
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
Because the normative solution to this task does not prescribe perfect accumulation, we could dissociate objective evidence presented on the screen from effective evidence (i.e. the belief updates that each token triggered), and map these quantities onto neural signals.
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
We used an expanded judgement task where participants watched a slow sequence of discrete tokens (400 ms per token, up to 10 tokens) which favoured one of two possible choices. The task was volatile, which means that the choice supported by the tokens may change within a trial.
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Elisabeth Parés Pujolràs @epares.bsky.social · 28/04/2025
Very happy to share this paper, now published in @natcomms.nature.com! nature.com/articles/s41... With @spk3lly.bsky.social and @neuromurphy.bsky.social, we investigated the neural computations that allow us to make near-optimal decisions in changing environments. Here's a short summary:
nature.com
Dissociable encoding of evolving beliefs and momentary belief updates in distinct neural decision signals - Nature Communications
People are capable of making near-optimal decisions in volatile, changing environments. Here, the authors show how two neural decision signals encode distinct aspects of the belief updating process un...
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Jade Duffy @jduffy9.bsky.social · 24/03/2025
In life, 3 things are certain: death, taxes, and decision-making variability🧠. Our review tinyurl.com/4dcwafc4 explores how computational models 💻 explain variability, their limits, and recent advances. A thread🧵👇 @redmondoconnell.bsky.social @neuromurphy.bsky.social Mark Bellgrove (not on Bluesky)
nature.com
Disentangling sources of variability in decision-making - Nature Reviews Neuroscience
Identifying the psychological and neurobiological processes underpinning intra-individual variations in choice behaviour presents a formidable challenge. In this Review, Duffy et al. discuss how algor...
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Marino Pagan @marinopagan.bsky.social · 21/03/2025
1/7 Our paper on individual variability in decision-making is finally out in @nature.com! Inspired by the classic work by Mante and Sussillo, we trained many rats to solve context-dependent decision-making, and we found that different brains use different neural mechanisms to solve the same task!
nature.com
Individual variability of neural computations underlying flexible decisions - Nature
Behavioural experiments to study decision-making in response to context-dependent accumulation of evidence provide testable models that are consistent with the heterogeneity in neural signatures among...
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