Thanks for responses! Why I mention W&S and types of noise: perhaps it could also serve as a test for your suggested model? And re optimality, without it, the models become too flexible, so for me, it serves as a good guiding principle.
On a broader level, 4) Wei & Stocker suggested that sensory vs stimulus noise allow to differentiate prior and likelihood effects - what's your thoughts on that? 5) Hahn and Wei's model isn't optimal by design, and your model seemingly inherits this - why _should_ prior be flat?
Very cool work! It's good to see more theoretical work on biases. I still have to read it in detail, but maybe you have time for some questions: 1) how do likelihood curves look like? 2) your model bias curves - are they smoothed? 3) how would the prediction for behavioral variability look like? ...
My first foray into explicitly trying to bridge Marr’s levels, with @bealebrains.bsky.social. Inspired by Hahn and Wei’s models (pubmed.ncbi.nlm.nih.gov/38360947/), we wondered how the brain could instantiate sensory inference with efficient /decoding/ properties.
1/
Exciting PhD opportunities in Aberdeen (inc. international)
Fantasy map of a region nested between a chasm and a mountain range. The technique used is a mix of cross hatching and watercolor. It features fantasy creatures like dragons, goblins and giants. The style evokes old books and fairy tales.
A fantasy map showing several villages along a river, at the foot of a huge mountain range. The style evokes an etching on antique paper.
Map of a small duchy perched on cliffs in the style of an ancient etching. There's a pointy castle in the middle next to a waterfall, small villages and rivers as well as mysterious landmarks such as a labyrinth and a mushroom forest. The frame is heavily ornamented.
The Mappa Discworld, featuring Terry Pratchett's Discworld and the great A'Tuin with many illustrated references to the books. Created for the Discworld Emporium.
#PortfolioDay N° 04142026
Greetings fellow denizens of the blue skies.
I'm and old school D&D nerd who draws fantasy maps for a living. While sharing is much appreciated, it's not mandatory.
Comments, though, are most welcome.
You may now resume scrolling and have a pleasant day.
My recent comment extends Shiffrin et al.'s (2026) essay on "Illusions of understanding". While they focused on multiple ways of understanding linear regression, I extend these ideas to a complex model class in cognitive science: Evidence Accumulation Models (EAMs). (1/6)👇
Thanks for the tip! It would be nice use R as high-level interface and coding language with JAX as a workhorse for efficient computing.
although on a more careful reading, the suggestion is to code Stan models directly in JAX - little less exciting but a good tutorial nevertheless
This is great! I've used Stan and JAX separately for different projects in the past, both are great, so hopefully this will be a huge step forward towards making Bayesian models faster. And then perhaps brms can now be used with Stan -> Jax as well?
Me too, sometimes, although I wonder if it is an advantage. Kind of makes it easier but not easy enough, so I end up spending too much time on things outside of my real expertise.
Interesting, but as a person engaged with normative behavior modeling, I cannot help but notice that based on this plot, choosing AI would lead to better overall performance if I had to decide whether to use AI or not. And from a practical perspective, people use LLM differently depending on goals.
New paper with Stefan Glasauer now out in PloS Comp Biol, explaining repulsive and attractive biases in vertical perception within a single Bayesian framework.
dx.plos.org/10.1371/jour...
You mean simultaneous multiplayer? I think jsPsych + Jatos can do this but not sure about delays.
ok, actually mine is
I'm sure those guys are bots =)))
mine is 40.87
Ah, found it! What I had in mind was more like automatic pagination, like e.g. here romikmakavana.me/tiptap-pagin... (this is of course not an markdown editor - but in principle there is nothing prohibiting 'pages' in markdown). Like splitting the text each x lines and adding margins.
Hmm, I don't see it. Is there smth I need to do to enable it?
I've spent last week trying to decode orientation from EEG data. The biggest insight I got is how noisy it is compare with fMRI signals I'm used to =) And I seemingly cannot get IEM (or PRINCE-like model) to get above-LDA accuracy (measured as circ correlation), and not for the lack of trying.
Screenshot of a manuscript title page. Title: “An AI agent can complete the Attention Network Test with human-like behavioral signatures: Implications for the bot-or-not debate.” Authors: Richard Huskey, Ziyu Zhao, Douglas A. Parry, and Jacob T. Fisher, with university affiliations listed below. The abstract says an autonomous AI agent completed the Attention Network Test in real time and produced mostly human-like behavioral data. Across seven code revisions, the bot achieved attention network scores within published human norms, 95.8% accuracy, and reaction-time patterns showing positive skew and trial-to-trial autocorrelation. Compared with 796 human participants, the bot fell within the human range on several measures but showed elevated autocorrelation and a bimodal reaction-time distribution due to intermittent detection failures. The paper argues this makes simple bot-vs-human detection harder in online reaction-time studies.
1/n
New preprint with Ziyu Zhao, @dougaparry.bsky.social, & @jacobtfisher.online
Can an AI bot complete a live online reaction-time task & produce data that passes as human?
We built an autonomous bot to take the Attention Network Test (ANT) in real time
Preprint:
doi.org/10.31234/osf...
I think this is a realistic assessment of the effort needed to build a bot.
or, for example, sync with Github that have chunks compiled so that you can have both the preview of the results and the ability to collaborate online? Really excited about this =)
and is it possible to run this locally and connect to an actual r/quatro engine to render code outputs?
Awesome, thank you! Works now. Would it be possible to add pagination? For me that is one of the most annoying things in markdown, that there are no clear pages, so when editing you don't have clear scaffolds for orienting in the text.
great study! and welcome to bluesky =)
🧠 What makes threat memories so hard to forget? 🐍😱
Using focused ultrasound we provide causal evidence that the human amygdala drives rapid threat learning 🐍⚡ and determines how resistant those memories become to subsequent extinction 🐍🚫
🆕📄 www.science.org/doi/10.1126/...
Awesome! In my browser (Firefox), typing often deletes previous symbols though (like if I type 'type' e might first appear then disappear).
But the colleagues say that if you really want to detach from teaching, then you need a year - otherwise you will still have many things that are easier to do yourself than to hand over to people who replace you.
I've been wondering the same thing. I decided not to wait, because who knows which rules will be applied in three years. But also I forgot about the deadline so I'll postpone it until next fall.
I've got another #visionscience YT video for you, this time about the optical reason behind the tilted wheels we draw when we want a car to look like it's speeding. Enjoy! youtube.com/shorts/7ilxy...