Samuel Hewitt, PhD
@samuelhewitt.bsky.social
AI Engineer & Tech Lead at https://Limbic.ai/ Building the next-generation of AI-led mental healthcare previously Computational Psychiatry & Neuroscience @ UCL
Here here !! Well done CPSY
Xiaosi Gu@xiaosigu.bsky.social · last yr.🔥💥📣 Excited to announce a new policy at the Computational Psychiatry (CPSY) journal @cpsyjournal.bsky.social. Starting from April 2025, CPSY will compensate reviewers for their time and effort invested in reviewing manuscripts. w/ @drrickadams.bsky.social cpsyjournal.org/articles/10....
#OCD is a understudied disorder, meaning that we know way too little about the underlying (brain) processes. We have thus built the Brain Explorer app www.brainexplorer.net where everyone can easily contribute to understanding OCD. #MentalHealthAwareness @tueneurocampus.bsky.social @ucl.ac.uk
Brain Explorer - Test your brain power
The brain explorer app for Apple and Android tests your brain functions and helps researchers to understand the brain. Explore your brain power and how brain functions are important for mental health.
brainexplorer.net
Hey cognitive scientists I asked lovable.dev to make me a 2-arm bandit RL task 2 prompts and 3 minutes later 🤯🤯🤯🤯 Play it: preview--cosmic-bandit-quest.lovable.app Think of the hours and grad student tears saved 😅 Yes lovable I accept your sponsorship terms
“Motivation drives changes in the subjective value of reward both in the moment and in the future.” www.pnas.org/doi/10.1073/...
Day-to-day fluctuations in motivation drive effort-based decision-making | PNAS
Internal states like motivation fluctuate substantially over time. However, studies of the neurocomputational mechanims of motivated behavior have ...
pnas.org
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)
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...
nature.com
When I began my PhD, there was a major disconnect between my own lived experience and the way researchers probed mental health-behaviour links. I hope this work inspires others to use new designs to appreciate the complexity of human beings and their experiences. link.growkudos.com/1f5ss3bn1ts
Day-to-day ups and downs in how we feel impact how we make decisions
Motivation is the subjective willingness to do things. This important feeling is closely linked with mental health as well as happiness, tiredness and sleep quality. Motivation also changes a lot over...
link.growkudos.com
Samuel Hewitt, PhD@samuelhewitt.bsky.social · 2y agoA little bby from my PhD is published! we did a complex study to answer a simple Q: do day-to-day feelings impact choices? A: Yes. When feeling motivated (independent of other stable or unstable feelings) choices changed because rewards seemed greater. open access link: doi.org/10.1073/pnas...
This is a great study, if I may say. We have had a lot of data showing correlations between subjective assessments and behaviour between individuals. With this study, we are starting to see how they interact over days within individuals. Congratulations @samuelhewitt.bsky.social!
Samuel Hewitt, PhD@samuelhewitt.bsky.social · 2y agoA little bby from my PhD is published! we did a complex study to answer a simple Q: do day-to-day feelings impact choices? A: Yes. When feeling motivated (independent of other stable or unstable feelings) choices changed because rewards seemed greater. open access link: doi.org/10.1073/pnas...
A little bby from my PhD is published! we did a complex study to answer a simple Q: do day-to-day feelings impact choices? A: Yes. When feeling motivated (independent of other stable or unstable feelings) choices changed because rewards seemed greater. open access link: doi.org/10.1073/pnas...
Day-to-day fluctuations in motivation drive effort-based decision-making | PNAS
Internal states like motivation fluctuate substantially over time. However, studies of the neurocomputational mechanims of motivated behavior have ...
doi.org
3.5 year PhD studentship in cognitive computational neuroscience open in my MSN lab, @thechbh.bsky.social, co-supervised with @selmalugtmeijer.bsky.social & @simonlittle.bsky.social. Deadline 23rd March. Only open to UK candidates. More details here: www.findaphd.com/phds/project... Pls repost
findaphd.com
I cannot deny photo evidence...! Nothing further, your honour😍 It's a wrap, finished, terminado.... thank you V V much, especially to my mentors for all the support @thepsychologist.bsky.social, Prof Essi Viding, @olijrobinson.bsky.social and especially @tobiasuhauser.bsky.social
Tobias Hauser@tobiasuhauser.bsky.social · 2y agoHuge congratulations to Dr Sam Hewitt @samuelhewitt.bsky.social for passing his PhD viva today without corrections!🥳🕺🏼🚀 Big thanks to Tali Sharot and @brainapps.bsky.social for being the examiners! 🙏🙏🙏 Some of the papers are dropping soon - stay tuned! @imagingneuroucl.bsky.social #proudsupervisor
In the beginning there were starter packs, then came the cull
a woman is looking at her phone and the word unfollow is on the bottom
Alt: a woman is looking at her phone and smugly clicking unfollow
media.tenor.com
I'm sick of GPT4 telling me I'm absolutely right. I'm not here for validation from a cyborg. Tell me about all the mistakes I made !
Funded PhD (UK students only). Interested in a PhD working in the MSN lab, co-supervised by Dr. Romy Froemer? Topic is flexible around themes of motivation and decision-making, using techniques such as computational modelling, brain imaging, or brain stimulation. www.findaphd.com/phds/project...
The Computational and Neural Dynamics of Human Motivation and Cognitive Control at University of Birmingham on FindAPhD.com
PhD Project - The Computational and Neural Dynamics of Human Motivation and Cognitive Control at University of Birmingham, listed on FindAPhD.com
findaphd.com
Early intervention for depression for young people. This week we're presenting findings from the BESST trial - Brief Educational Workshops in Secondary Schools. Watch the videos in this THREAD or sign up to join our webinar on Friday: www.eventbrite.co.uk/e/early-inte... #BESSTtrial #Depression
Early intervention for depression for young people
Join our free webinar to hear results from the BESST trial and ideas about how we might implement DISCOVER nationally.
eventbrite.co.uk
JOB ALERT: We are recruiting a research assistant in the Imagine Reality Lab to work on a project using MEG decoding to distinguish between different theories of consciousness 🧠 Get in touch if you have any questions about the role's scientific details. Please share! www.ucl.ac.uk/work-at-ucl/...
UCL – University College London
UCL is consistently ranked as one of the top ten universities in the world (QS World University Rankings 2010-2022) and is No.2 in the UK for research power (Research Excellence Framework 2021).
ucl.ac.uk
I heard @theferocity.bsky.social recite this on the excellent podcast Vibe Check. Like his own work and the other poems he shares, it’s so damn good.
Leeds has a fully funded scholarship program for undergraduate and Masters study for Gaza students. **Tell Everyone** www.leeds.ac.uk/masters-scho...
Gazan Humanitarian Scholarship
We offer scholarships for citizens of Gaza who have been displaced as a result of the ongoing conflict in the region and are living in a different country (outside of the UK).
leeds.ac.uk
Finally, an app to help dodge shit
Adam Vaughan@adamvaughan.bsky.social · 2y agoSome good news for river and sea campaigners in England National sewage spill map to help swimmers dodge pollution in real time @thetimes.com Clean it Up campaign has been calling for this www.thetimes.com/uk/environme...
This place is getting seriously good; and this is better than good, just magnificent.
James Jenks@jenksy.bsky.social · 2y agoMy old boss did a lot of stupid things, like, proper crazy stuff, but the funniest was when he was on the roof of our shop and looked like he was about to leap the 6-foot gap to the roof of the neighbouring building. I shouted, "Jim, don't be stupid, there's no way you'll make that jump!"
First post here: our latest paper on insight-like learning dynamics (and the factors causing them) in humans and ANNs journals.plos.org/ploscompbiol... published last month in PLoS Comp Bio. with @nicoschuck.bsky.social @summerfieldlab.bsky.social @saxelab.bsky.social Paul Muhle-Karbe and Léo Touzo
Abrupt and spontaneous strategy switches emerge in simple regularised neural networks
Author summary Insights, or aha-moments, are a remarkable phenomenon in human cognition that is unique in a number of ways: they are accompanied by a powerful subjective experience, occur abruptly aft...
journals.plos.org
Amazing work identifying a key factor which drives indecisiveness. A rare combination of smartphone behaviour (general population), patients with clinical obsessive-compulsive and anxiety disorders and imaging...! In one study 😱💥
Magda del Río@magdadelrio.bsky.social · 2y agoNew preprint from my postdoc with @tobiasuhauser.bsky.social at the MPC! TL;DR: there is a strong recency bias in information gathering and it is attenuated in people on the #OCD spectrum - a possible mechanism for #indecisiveness 🤔 Paper here: www.biorxiv.org/content/10.1... Thread below...
I wish people would stop mentioning that place and that guy. Let's be present in the beautiful new world
📢 Computational Psychiatry Conference 2025: symposium abstract submission now open. 📢 We are excited to announce that #cpconf2025 will take place in Tübingen, Germany, 14-16 July 2025. We are now accepting symposium submissions!
People making demands of BlueSky tech team, mods etc because it’s getting busy: BlueSky has a staff of 20. None of us are paying a penny to use it, and it has, at the moment, no way to monetise itself, as far as I can see, because it’s trying to resist any pivot to algorithmic ads or selling data.
If you can't cite yourself, how in the hell you gonna cite someone else?
a drag queen is asking if she can get an amen up in here
ALT: a drag queen is asking if she can get an amen up in here
media.tenor.com
New work led by Michael Moutoussis! When evaluating others' motives, people first make a rough good/bad judgement and then (if all goes well) refine their views. Serotonin may help us learn beyond the good/bad impression: academic.oup.com/scan/advance... #neuroskyence #psychscisky
academic.oup.com
