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Harrison Ritz

@hritz

cybernetic cognitive control computational cognitive neuroscience Connected Minds Fellow @ Queens University + RRI he/him πŸ‡¨πŸ‡¦ harrisonritz.github.io

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28.07.2023
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Latest posts by Harrison Ritz @hritz

Lab AI Policy | Todd Gureckis Clear expectations for how every member of our lab should use generative AI tools responsibly, transparently, and in a way that upholds rigorous, reproducible, open science.

draft lab ai policy, feel free to use, modify, or discuss! todd.gureckislab.org/2026/03/06/g...

07.03.2026 02:18 πŸ‘ 14 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1

so cool!

07.03.2026 02:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

this looks so cool

07.03.2026 02:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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If you are attending #CNS2026, see you at our frontal lobe focused symposium this sunday morning.

www.cogneurosociety.org/invited-symp...

@cogneuronews.bsky.social

06.03.2026 03:29 πŸ‘ 7 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0

Looks sick. You’ve been on a roll lately!

05.03.2026 00:21 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

1/ New preprint out! β€œControl of cortical population activity with patterned microstimulation.” We show that brief training with multi-electrode stimulation pulses is enough to steer prefrontal population activity along desired trajectories in awake macaques. tinyurl.com/3d6kv26w

04.03.2026 23:51 πŸ‘ 18 πŸ” 9 πŸ’¬ 1 πŸ“Œ 2

No! Swear I was taught like-urt.

04.03.2026 21:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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I am totally pumped about this new work . "Task-trained RNNs" are a powerful and influential framework in neuroscience, but have lacked a firm theoretical footing. This work provides one, and makes direct contact with the classical theory of random RNNs:
www.biorxiv.org/content/10.6...

04.03.2026 17:12 πŸ‘ 84 πŸ” 31 πŸ’¬ 2 πŸ“Œ 3
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The international boycott of ChatGPT has absolutely exploded.

2.5M people have already joined, and this is just the beginning.

Go to quitgpt.org.
Cancel your subscription, delete your account.
And tell at least one person why.

My op-ed: www.theguardian.com/commentisfre...

04.03.2026 09:03 πŸ‘ 903 πŸ” 512 πŸ’¬ 41 πŸ“Œ 54

Let the record show that @lilweb.bsky.social is a badass for building the next generation of HGF

04.03.2026 15:14 πŸ‘ 10 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Raccoons optimally forage for information: exploration–exploitation trade-offs in innovation Animals in rapidly changing environments, such as cities, should optimize information gathering to learn about and efficiently forage in these heterog…

Trash pandas show effort-based discounting of β€œexploratory” decision making.

Optimally claims aside, I genuinely love this study.

www.sciencedirect.com/science/arti...

04.03.2026 11:24 πŸ‘ 14 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Recently, van der Stigchel and colleagues posted a provocative commentary suggesting that we should be wary of bots in online behavioral data collection (🧡by @cstrauch.bsky.social here: bsky.app/profile/cstr...). But should we? Here is my response letter osf.io/preprints/ps.... 1/5

04.03.2026 12:51 πŸ‘ 43 πŸ” 28 πŸ’¬ 5 πŸ“Œ 3

I find AR to be very strong, but probably depends on the task.

Great thread! Missed that their indices aren’t convergent, and agree that there should be better outlier stats (eg GESD). Think they’d argue for a mixture of bots, but you’re right that for many tasks any bot would be v hard.

04.03.2026 13:56 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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With Eugene Koonin, we propose a concept of β€œthe selfish ribosome”, under which evolution of life is viewed as a ribosomal takeover, where the ribosome evolved to consume most of the cell’s resources, while other cellular componentry ensures the propagation of the ribosome. arxiv.org/abs/2602.23268

03.03.2026 08:58 πŸ‘ 221 πŸ” 95 πŸ’¬ 5 πŸ“Œ 13

Deadline is Friday! If you've been on the fence about BAMB! 2026 β€” jump. It's one of the best summer schools for behavioral & computational modeling out there, and I'd know πŸ˜„
Apply β†’ bambschool.org
#Neuroscience #CogSci #ComputationalNeuroscience #SummerSchool #AcademicBsky

03.03.2026 17:14 πŸ‘ 8 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

IMO:
- vscode with copilot and/or claude code
- work in bite-sized chunks
- use tests to reality-check

We have a paper, led by @ericwbridgeford.bsky.social:
www.poldracklab.org/10sr_ai_assi...

Russ is working on a longer book:
bettercodebetterscience.github.io/book/ai-codi...

03.03.2026 23:55 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Computational Neuroscience 
3 Weeks, 6-24 July 20206

Computational Neuroscience 3 Weeks, 6-24 July 20206

Applications are open for #CompNeuro, a live, intensive online course. Participants learn to combine modern #MachineLearning and causality frameworks with advanced modeling approaches to tackle real #neuroscience questions.

neuromatch.io/computationa...

03.03.2026 08:00 πŸ‘ 15 πŸ” 6 πŸ’¬ 0 πŸ“Œ 2

phishing reported

03.03.2026 14:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Rutgers-Princeton Center for Computational Cognitive Neuropsychiatry Visit the post for more.

The Rutgers-Princeton Center for Computational Cognitive NeuroPsychiatry (ccnp.princeton.edu) is looking for a new clinical research coordinator! This is a long-term (at least 2 years, more is preferred) position for someone with a BA or MA who is interested in... /1

23.02.2026 02:03 πŸ‘ 22 πŸ” 18 πŸ’¬ 1 πŸ“Œ 1
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Endel: Your free Endel subscription Join the sound wellness revolution

Gotta be Endel
endel.sng.link/Ezeow/6l18q/...

But for the longest time it was Funeral

03.03.2026 12:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Postdoc position -- Social Learning and Cultural Evolution Postdoc position -- Social Learning and Cultural Evolution posted on March 2, 2026 We are currently seeking a highly motivated individual...

πŸš€ Postdoc Alert! Are you passionate about social learning & cultural evolution? @dominikdeffner.bsky.social & I have a 3-year position with freedom to develop your research and work on cutting-edge multiplayer and immersive experiments. Apply by March 30! hmc-lab.com/SocialLearni... Pls share πŸ™

02.03.2026 10:45 πŸ‘ 59 πŸ” 62 πŸ’¬ 2 πŸ“Œ 3

From the top of my head, here some recent ones:

"Two views on the cognitive brain" by @johnwkrakauer.bsky.social, @dlbarack.bsky.social

"Reconstructing computational system dynamics from neural data with recurrent neural networks" by @durstewitzlab.bsky.social et al

1/3

01.03.2026 14:28 πŸ‘ 30 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0

After several years of work, my lab is starting to put out our first papers on learning in a unicellular organism (Stentor coeruleus).

Here we show evidence for a form of associative learning in Stentor:
www.biorxiv.org/content/10.6...

26.02.2026 11:39 πŸ‘ 176 πŸ” 57 πŸ’¬ 5 πŸ“Œ 7
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🚨 New Paper: Controlling the Human Connectome with Spatially Diffuse Input Signals

Now in press at Communications Biology!

www.nature.com/articles/s42...

28.02.2026 23:54 πŸ‘ 38 πŸ” 13 πŸ’¬ 0 πŸ“Œ 1
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Two-photon calcium imaging at 24,000 lines/s, with the resonant axis spanning 4x what other systems can do. Inertia-free. Diffraction-limited. No tradeoffs. Che-Hang Yu developed a 4x angle multiplier for laser scanning. His paper is out today: opg.optica.org/optica/fullt... 1/n #fluorescenceFriday

27.02.2026 20:16 πŸ‘ 97 πŸ” 22 πŸ’¬ 1 πŸ“Œ 1

nothing more powerful!

27.02.2026 16:28 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

How dynamics arise from the structure is my biggest interest. In this study, we started with a small step and asked how structure constrains dynamics. Spoiler: would that it were so simple… (1/6)

27.02.2026 10:13 πŸ‘ 30 πŸ” 23 πŸ’¬ 1 πŸ“Œ 2

Awesome!

27.02.2026 14:21 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Looks very cool, congrats guys

27.02.2026 13:57 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Why is touch perceived as weaker during movement?

In our new preprint πŸ“, we examine tactile suppression during reaching.

Using optimal control theory, we show that tactile suppression reflects dynamic, uncertainty-dependent integration of forward model predictions and sensory feedback.

27.02.2026 10:57 πŸ‘ 36 πŸ” 9 πŸ’¬ 2 πŸ“Œ 3