Sign in

Fred Callaway

@fredcallaway.bsky.social
771 followers 566 following 113 posts

I study how people solve big problems with small brains. Starting at Dartmouth in 2026—I'm recruiting! fredcallaway.com

PostsRepliesMedia
Fred Callaway @fredcallaway.bsky.social · 02/10/2026
Let me know if you’re looking for alpha testers!
000
Reposted by Fred Callaway
Josh de Leeuw @joshdeleeuw.bsky.social · 02/10/2026
Trying out a live demo in the documentation site.
2147
Fred Callaway @fredcallaway.bsky.social · 02/10/2026
Excited to give this a spin when it’s released!
040
Reposted by Fred Callaway
Jordan Lei @jordanlei.bsky.social · 28/09/2026
Our paper is out in Nature Communications! In our messy, noisy world, do you find planning difficult/less worthwhile? It's not just you. As we increased the stochasticity in a planning environment, we found that people spent less effort planning: www.nature.com/articles/s41... #cogsci #planning
nature.com
Environmental stochasticity reduces human planning effort - Nature Communications
The real world is stochastic, making it difficult to know when planning is worthwhile. Here the authors show that as stochasticity increases, people spend less effort planning and adopt simpler, less ...
26219
Fred Callaway @fredcallaway.bsky.social · 25/09/2026
This is the key point for me. Throw in the abundance of the much more repetitive survey and AI training tasks, and the cogpsych experiments look like a really low value target.
030
Fred Callaway @fredcallaway.bsky.social · 25/09/2026
I guess I trust my fellow humans to choose their fraud targets intelligently :P
020
Fred Callaway @fredcallaway.bsky.social · 24/09/2026
I think it's clear at this point that someone *could* get a bot to do online cognitive tasks without being detected. My question is: *would* anyone do this? Are cogpsych experiments (vs. surveys) really an appealing target for bad actors?
3120
Fred Callaway @fredcallaway.bsky.social · 15/09/2026
For me, it was illuminating to see that this question cannot be answered *in principle* without committing to a specific level of analysis. But I can see how the idealized question would itself seem “beside the point” if the actual debate is a simpler empirical question about what ANNs can learn.
020
Fred Callaway @fredcallaway.bsky.social · 15/09/2026
Hmm this is compelling. I wonder if our “disagreement” is the result of you focusing on the actual debate as it exists in the literature and me focusing on an idealized form of the question “is X innate or learned”
120
Fred Callaway @fredcallaway.bsky.social · 14/09/2026
It's true that some nativists (e.g. Chomsky) were genuinely incorrect about what neural networks can do. But this is besides the point once we've established that the motivating question is nonsensical.
030
Fred Callaway @fredcallaway.bsky.social · 14/09/2026
I think it's deeper than terminology. The point is that one physical process involves learning at one level of analysis but not another. Thus the generic question "is process X learned or innate" is ill-posed. Neither side can be right or wrong.
220
Fred Callaway @fredcallaway.bsky.social · 12/09/2026
I can't remember the last time I enjoyed a paper as much as this one. Such clear thinking. Beyond the compelling nativism-empiricism argument, it's among the best illustrations/explanations of levels of analysis I've seen. www.cell.com/trends/cogni...
cell.com
The nativist–empiricist debate is broken
The nativist–empiricist debate has long organized cognitive science, framing cognitive mechanisms as either innate or learned. Recent advances in controlled rearing and scalable domain-general neural ...
0163
Fred Callaway @fredcallaway.bsky.social · 10/09/2026
Thank you for unearthing this delightful childhood memory. Yes. Yes I did.
020
Fred Callaway @fredcallaway.bsky.social · 10/09/2026
I take great joy in using a pullout faucet to create a "whirlpool" in the pot I'm washing, with peak joy ~exponential in rotational velocity. This surely points to something deep about human cognition, but I'm not sure what.
390
Reposted by Fred Callaway
Charley Wu @thecharleywu.bsky.social · 07/09/2026
🚨New preprint with Fei Dai, @hanqizhou.bsky.social and @alisongopnik.bsky.social We extend empowerment (control over external states) by turning it inward. *Representational empowerment* asks which representations a learner should acquire and curate to solve future problems arxiv.org/abs/2609.02322
06111
Reposted by Fred Callaway
Zihan Bai @zihanbai.bsky.social · 03/09/2026
Excited to share the first first-author preprint of my PhD at NYU with @s-michelmann.bsky.social andDaryl Fougnie. Using eye-tracking in a novel behavioral paradigm, we reveal the mechanisms by which episodic memory (EM) and working memory (WM) interact. 🧠 doi: doi.org/10.64898/202...
doi.org
13512
Reposted by Fred Callaway
Nora Harhen @noraharhen.bsky.social · 11/08/2026
How do we make good decisions with little experience? Adults can rely on memories of past choices. In our new study in @pnas.org we show kids & teens do something similar–but what they remember turns out to be quite different! www.pnas.org/doi/10.1073/...
pnas.org
Developmental changes in memory structure and precision alter the use of retrieved episodes during decisions for reward | PNAS
Most widely studied option evaluation strategies rely on knowledge accumulated across repeated experiences. But how should options be evaluated in ...
29340
Reposted by Fred Callaway
manvir singh @manvir.bsky.social · 25/08/2025
Why do societies reliably develop strikingly similar traditions like dance songs, hero stories, shamanism & justice institutions? In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...
17834
Fred Callaway @fredcallaway.bsky.social · 07/08/2026
Can you look me in the eye and say you’ve never spent tremendous effort optimizing for the wrong thing entirely? But yes I think people are still better at this.
000
Fred Callaway @fredcallaway.bsky.social · 05/08/2026
This. But I’d take it further. Most humans are most often substantially less logical and more biased than frontier models. Humans are still much smarter in many crucial ways, but internal consistency is not one of them.
2100
Reposted by Fred Callaway
Gary Lupyan @glupyan.bsky.social · 02/08/2026
like us! No one is doing computer science and math with their naked brains. Pen & paper, math notation, computer language—these are our neurosymbolic add ons! @lampinen.bsky.social , @blaiseaguera.bsky.social , @kmahowald.bsky.social all get it. Not sure why this isn’t more obvious to folks
0122
Reposted by Fred Callaway
Eleanor Holton @eleanor-holton.bsky.social · 31/07/2026
So thrilled to be joining the Psychology Department at @columbiauniversity.bsky.social as an assistant prof next summer! I'll be recruiting for PhD/postdoc to start in Autumn 2027, so if you're interested in using computational approaches to studying human cognition please get in touch!
1312518
Fred Callaway @fredcallaway.bsky.social · 08/07/2026
Tired of doom-scrolling bluesky? Try mitpuzzles.com!
mitpuzzles.com
MIT Puzzles
MIT researchers study human cognition through logic puzzles
081
Reposted by Fred Callaway
Ev Fedorenko @evfedorenko.bsky.social · 30/06/2026
So proud of Ted @languagemit.bsky.social! <3
0211
Fred Callaway @fredcallaway.bsky.social · 26/06/2026
Whoops the reference is right there, Nyquist. Second questions remains!
000
Fred Callaway @fredcallaway.bsky.social · 26/06/2026
Reference? What does this imply about the basic paradigm of cognitive psychology (inferring cognitive process from stimulus-response mappings)?
100
Reposted by Fred Callaway
Jonathan Nicholas @jonathannicholas.bsky.social · 19/06/2026
We make flexible choices in new situations by knitting together information from separate relevant memories. But what governs which memories are retrieved and when? In a new preprint, we captured how people build decision variables from different memories by tracking their gaze on a blank screen.
biorxiv.org
Flexible decisions arise from resource-rational memory sampling
Flexible decision making depends on retrieving and recombining memories. Yet because this process unfolds covertly, its governing principles remain unknown. Here we use gaze reinstatement to uncover t...
27527
Fred Callaway @fredcallaway.bsky.social · 19/06/2026
As an outsider, the term “ecological” means “reflects the structure of the environment the organism is adapted to”. I’m not sure Gibson (or anyone) can reasonably trademark such a general term to include a set of more specific theoretical commitments.
100
Reposted by Fred Callaway
Mark Ho @markkho.bsky.social · 17/06/2026
How do human minds make sense of big, messy problems? 😵‍💫🌀 How do we distill complexity into something simple enough to solve? 🤔💡 We’ll be tackling these questions (and more!) at two workshops on task representations, abstractions, and construals #CogSci2026 #CCN2026 🧵 framing-the-problem.github.io
framing-the-problem.github.io
Framing the Problem — Workshop Series
A workshop series on representation construction in cognitive science and AI. CogSci 2026 (Rio) and CCN 2026 (NYU).
28218
Reposted by Fred Callaway
Andrew Lampinen @lampinen.bsky.social · 12/06/2026
Pleased to share that this work is now published in TMLR! openreview.net/forum?id=RuW...
openreview.net
Latent learning: episodic memory complements parametric learning by...
When do machine learning systems fail to generalize, and what mechanisms could improve their generalization? Here, we draw inspiration from cognitive science to argue that one weakness of...
1346
Fred Callaway @fredcallaway.bsky.social · 06/06/2026
There's also a question of what the model should provide: accurate predictions? compact description? a plausible mechanism? normative grounding? I think most researchers want 3 and/or 4 in addition to 1/2, and this guides their search. Could such qualities be incorporated into the DIVER objective?
120
Fred Callaway @fredcallaway.bsky.social · 06/06/2026
Good point. But there's a difference between "fitting" a broad task space (drifting bandits) vs. a specific instance in that space (low noise and volatility). Overwriting values and resetting perseveration works well for *that specific instance* but likely not others (vs. Kalman, which generalizes).
210
Fred Callaway @fredcallaway.bsky.social · 05/06/2026
How do you think about generalization? When designing models the Amish way, I’m always trying to avoid “fitting the task.” The unique mechanisms in the human bandit model seem specifically well suited to slowly drifting bandits with low observation noise.
140
Fred Callaway @fredcallaway.bsky.social · 20/05/2026
What do you think of the logo?
170
Fred Callaway @fredcallaway.bsky.social · 20/05/2026
I was thinking "codec lab" for "computation as decision making"
140
Fred Callaway @fredcallaway.bsky.social · 19/05/2026
I'm making a website for my new lab (!!!). Who should I steal ideas from? (Self-nominations welcome)
4100
Reposted by Fred Callaway
Ethan Mollick @emollick.bsky.social · 28/04/2026
This is an actual line that was added to the official system prompt for Codex for GPT-5.5 by OpenAI. Usually the system prompt is as minimal as possible, so I assume it would otherwise mention goblins a lot. AIs are weird.
571323266
Fred Callaway @fredcallaway.bsky.social · 17/04/2026
Thanks for the clarification! Perhaps I should follow Leahey and use “behavioralism” to focus on the methodological approach.
000
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
Literally all? Surely neuroscience has provided at least something here—the ring attractor for heading direction? On the paper, this is exactly the point I was trying to get at (aside from the consciousness angle). Thanks for the pointer!
020
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
I’ll ignore the aim comment… As I understand it, behaviorism, like cognitivism, is not a theory but a methodological and philosophical approach. Both approaches generate falsifiable theories. As for the definition, perhaps mine was too generous. How would you define behaviorism?
110
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
But the moment we start taking our models too seriously, we fall into the trap Skinner warned us of: believing things we have no evidence for. I think that cognitive science has largely fallen into this trap (myself included), and that we'd benefit greatly from taking Skinner's ideas more seriously.
160
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
This is not to say cognitive models aren't valuable. Going full Hofstadter, the representations in a model are themselves representations: useful ways to understand behavior and brain. This deflates Skinner's critique of cognitivism. Representations aren't true or false; they don't need evidence.
110
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
This representation parameterization is useful because it (1) tends to generalize better and (2) is more interpretable. But this is just data-efficiency and aesthetics. These properties cannot provide *evidence* against behaviorism. And they provide weak (if any) evidence for the representation.
121
Fred Callaway @fredcallaway.bsky.social · 16/04/2026
Good read. I'd go further and suggest that scientific evidence against behaviorism is impossible in principle. Behaviorism simply says that you can model behavior as p(behavior | experience, genes). Cognitivism just adds a latent state, r (representation): p(b|e,g) = ∫ p(b|r) p(r|e,g) dr. (1/4)
3101
Reposted by Fred Callaway
Grace Lindsay @neurograce.bsky.social · 12/04/2026
New preprint from my lab! We study how reinforcement learning & selective attention interact. To do so, we built a set of models describing different ways that value & reward prediction error can modulate top-down attention. We compare model outcomes to monkey data from a color value learning task
210034
Reposted by Fred Callaway
Ruairidh McLennan Battleday @battleday.bsky.social · 05/03/2026
📢📢 Announcing this year's conference on the Mathematics of Neuroscience & AI (Rome, 9-12th June). We’ve got a stellar line-up and venue, and invite everyone to join: www.neuromonster.org
23017
Fred Callaway @fredcallaway.bsky.social · 18/02/2026
You can read an un-copyedited version for free here: osf.io/preprints/ps... Or you can get the real thing for $28 here: press.princeton.edu/books/paperb... Use discount code: P329
osf.io
OSF
2141
Fred Callaway @fredcallaway.bsky.social · 18/02/2026
I'm most proud of Chapter 3, which provides a new formal definition of resource rationality: it's an interpolation between constrained optimization (bounded optimality) and cost-benefit tradeoffs (metalevel rationality, e.g. EVC). The word "resource" turns out to be critical.
2120
Fred Callaway @fredcallaway.bsky.social · 18/02/2026
I'm excited to announce that I had my first (co-authored) book published today! "The Rational Use of Cognitive Resources" with Falk Lieder and Tom Griffiths (@cocoscilab.bsky.social ). You can read it for free! (see thread)
Book cover. A silhouette of a person's head filled with colorful geometric shapes—perhaps symbolizing cognitive resources or deployment thereof. The style is attractive and modern, if generic.

text: 
The Rational Use of Cognitive Resources
Falk Lieder, Frederick Callaway, Thomas L. Griffithts
215345
Reposted by Fred Callaway
Nature Human Behaviour @nathumbehav.nature.com · 05/02/2026
Hybrid neural–cognitive models reveal how memory shapes human reward learning
dlvr.it
Hybrid neural–cognitive models reveal how memory shapes human reward learning
Nature Human Behaviour, Published online: 05 February 2026; doi:10.1038/s41562-025-02324-0Using artificial neural networks applied to human data, Eckstein et al. show that good models of reinforcement learning require memory components that track representations of the past.
094