Riccardo Fusaroli

@fusaroli.eurosky.social

Cognitive Science at Aarhus Uni. Curious about social interactions, symbolic behaviors, and meta-science. Focus on stats, computational modeling, machine learning, complex systems, language, exp semiotics and neuropsychiatric conditions. He/They.

Science is hard, we should all work hard to do it better, & we should all help each other (also) with methodological developments and tutorials. However, this is an endless endeavor with no one solution. To translate a collective tentative striving into one normative framework seems disingenuous

Berna Devezer@devezer.bsky.social · 2d ago

i've read from many that "gold standard science" sounds good in principle and that could not be farther from my truth. there is no such thing, there cannot be such a thing, and the sheer thought that it could actually be a good idea betrays a complete ignorance about science and scholarship.

Do non-human primates have theory of mind? My new paper takes a new computational approach to this classic question. We implemented verbal theories of primates' mental representations as computational models. These models completed classic visual perspective-taking tasks.

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📣 I'm recruiting a new grad student at Cornell for F27, so please share the word with possible candidates interested in conversation as it intersects with language processing, evolution, and/or statistical learning, approached using computational and/or behavioral methods. 👉 Email me if interested

Illustration showing two people conversing with each other, with  interpretation through pattern recognition involving the integration of multiple cues, including social cues (pointing), the visual environment, what they know about the person they’re talking with, knowledge about the world, prior discourse, cultural expectations, and communicative goals.

A FAQ is what to do in case of high Pareto-k's with PSIS-LOO or PSIS-LOGO. In case of hierarchical models we can integrate out group specific parameters before PSIS. We investigated reliability of some alternative integration methods with the eventual goal of automating this arxiv.org/abs/2609.05713

Title: Approximating Bayesian leave-one-group-out cross-validation
Authors: Anna Elisabeth Riha, Svenja Jedhoff, Paul-Christian Bürkner, Aki Vehtari
Abstract: When data are grouped, hierarchical or multilevel models are commonly used to account for group-level variation with group-specific parameters. Leave-one-group-out cross-validation (LOGO-CV) is a suitable tool for evaluating predictive performance for new groups, providing an estimator of the expected log predictive density (elpd). Brute-force LOGO-CV requires one model refit per held-out group, often using computationally expensive inference algorithms such as MCMC. This is costly, particularly for large numbers of groups or complex model structures. Commonly used importance sampling approximations, intended to reduce this cost, tend to fail because the group-specific parameters of the held-out group must be integrated out. We identify two key challenges in LOGO-CV elpd estimation: approximating the LOGO posterior and computing the grouped marginal likelihood. We compare 11 strategies, including 5 newly proposed, to address them. Among others, we combine Pareto-smoothed importance sampling or adaptive importance sampling with integration techniques such as Laplace approximation, adaptive Gauss-Hermite quadrature, and bridge sampling. We evaluate these strategies in both simulation experiments and real-world case studies, which show that marginalising over the group-specific parameters substantially improves the reliability of the importance sampling approaches.

The open secret to pedagogy research is that small class sizes/maximizing educator attention per pupil is the simplest, most effective, and unfortunately the least attractive to administration thing you can do to improve learning outcomes.

Asheesh Kapur Siddique@asheeshks.org · 2w ago

We know how to teach books in the age of AI: small classes, close reading, research-engaged learning (which is how you ’let students see you struggle’). The issue is nobody will hire and pay the requisite # of faculty to offer this.

One of the things I find most fascinating in mathematical/computational thinking is the borrowing and development of model components from other domains. I need to model how different coders annotate a corpus? It's like occupancy models in ecology, with some twists! 1/

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Since I'm slightly crazy, I decided to start drawing the DAG(s) of an apparently simple language-matched longitudinal study of language development in autism, and its implications. This is a work in progress, so sharing as a way of better defining my thoughts. Comments welcome! Thread!

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through the holidays, I decided I'd try to put a llm onto a side project I never found the time for. Initial plan & checks, every few days I'd check in, briefly review (me&a2nd llm), give feedback & push it forward. It did a lot of work, but what an unbelievable amount of technical debt 😱 1/

"The decision goes against everything we want as a university." Ecouraging to see AU’s Pro-rector Berit Eika express clear support for our Cognitive Science program. Management shares our frustration, but they're bound by recent political mandates. 1/ omnibus.au.dk/en/archive/s...

Pro-Rector: “The decision goes against everything we want to achieve as a university”

The senior management team has decided to convert the English-taught bachelor's degree programme in Cognitive Science into a Danish-language programme, even though the decision "goes against everythin...

omnibus.au.dk

"Beslutningen strider mod alt det, vi gerne vil som universitet." Prorektor forstår vores frustration og anerkender nu i Omnibus, at omlægningen af Cognitive Science til dansk går stik imod AUs egne ønsker, men er drevet af pludselige politiske krav. Læs hendes svar: omnibus.au.dk/arkiv/vis/ar...

Prorektor: ”Beslutningen strider mod alt det, vi gerne vil som universitet”

Universitetsledelsen har besluttet at omlægge den engelsksprogede bacheloruddannelse i Cognitive Science til dansk. Til trods for, at ”beslutningen strider mod alt det, vi gerne vil som universitet”, ...

omnibus.au.dk

How I got to empathise w the german way to Italian cuisine. Last time i was in Tokyo i took a ramen course. Amazing. I then fell in love w the vegan ramen uzu at the Teamlab planet installation. I’ve been working on reproducing it. Yet 1/

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I've been part of the Cognitive Science environment at Aarhus University since its early years, and I helped create the programme. It's easy to think of internationalisation as an add-on, or something that happens to a programme after it exists. 1/

Riccardo Fusaroli@fusaroli.eurosky.social · last mo.

The Danish government wants to reduce the n of international students. To comply Aarhus uni has decided to convert our Cognitive Science BSc into a Danish only education. Our wonderful students are pushing back: omnibus.au.dk/en/archive/s... 1/

Jeg har været en del af Cognitive Science-miljøet siden uddannelsens første år og har været med til at skabe den. Det vil jeg gerne sige noget om først. For det er nemt at tænke på internationalisering som noget, der overgår en uddannelse, efter den er blevet til. 1/

Riccardo Fusaroli@fusaroli.eurosky.social · last mo.

Regeringen vil skære i antallet af internationale studerende. For at leve op til det omlægger Aarhus Universitet vores bachelor i Cognitive Science til en rent dansksproget uddannelse fra 2027 Det modarbejder præcis de mål, universitetet og regeringen selv forfølger omnibus.au.dk/arkiv/vis/ar... 1/

"...knowing when to stop banging one’s head against those internal cranial walls and ask a stupid question of one who knows more than you. Figuring out how to present a stupid question to someone you do not want to think you stupid is also a necessary component of thinking and learning."

Mel Andrews@bayesianboy.bsky.social · last mo.

You cannot produce knowledge while outsourcing your thinking to software. thecybernetician.substack.com/p/being-in-t...