Harrison Ritz
@hritz.bsky.social
cybernetic cognitive control 🤖
computational cognitive neuroscience 🧠
postdoc princeton neuro 🍕
he/him 🇨🇦 harrisonritz.github.io
computational cognitive neuroscience 🧠
postdoc princeton neuro 🍕
he/him 🇨🇦 harrisonritz.github.io
Pinned
Harrison Ritz
@hritz.bsky.social
· Jul 27
We put out this preprint a couple months ago, but I really wanted to replicate our findings before we went to publication.
At first, what we found was very confusing!
But when we dug in, it revealed a fascinating neural strategy for how we switch between tasks
doi.org/10.1101/2024.09.29.615736
🧵
At first, what we found was very confusing!
But when we dug in, it revealed a fascinating neural strategy for how we switch between tasks
doi.org/10.1101/2024.09.29.615736
🧵
Reposted by Harrison Ritz
This cool post on .gitconfig by @csgillespie.bsky.social (@jumpingrivers.com) is incredibly useful, especially the conditional includes tip.
www.jumpingrivers.com/blog/recomme...
#rstats #databs
www.jumpingrivers.com/blog/recomme...
#rstats #databs
Building a Robust .gitconfig
Explore how to optimise your Git workflow with a well-crafted .gitconfig file.
From commit signing and branch management to conditional includes for work-personal separation, learn the settings that t...
www.jumpingrivers.com
February 10, 2026 at 1:04 AM
This cool post on .gitconfig by @csgillespie.bsky.social (@jumpingrivers.com) is incredibly useful, especially the conditional includes tip.
www.jumpingrivers.com/blog/recomme...
#rstats #databs
www.jumpingrivers.com/blog/recomme...
#rstats #databs
Where is the effort research on ‘babies aren’t weak, they’re just unmotivated’
February 10, 2026 at 3:36 PM
Where is the effort research on ‘babies aren’t weak, they’re just unmotivated’
Reposted by Harrison Ritz
In case this important point gets overlooked: along with our Nature paper, we’ve publicly released two large and scarce datasets—PIPD and PIET. IMHO, these are the best open Parkinson's and Tremor datasets available to date.
See threads (1/4) 👇
nature.com/articles/s41...
See threads (1/4) 👇
nature.com/articles/s41...
Parkinson’s disease as a somato-cognitive action network disorder - Nature
The substantia nigra and all Parkinson’s disease deep-brain stimulation targets are selectively connected to the somato-cognitive action network rather than to effector-specific motor regions.
nature.com
February 10, 2026 at 1:56 AM
In case this important point gets overlooked: along with our Nature paper, we’ve publicly released two large and scarce datasets—PIPD and PIET. IMHO, these are the best open Parkinson's and Tremor datasets available to date.
See threads (1/4) 👇
nature.com/articles/s41...
See threads (1/4) 👇
nature.com/articles/s41...
super cool — did you do all the metalwork for the body?
February 10, 2026 at 2:43 AM
super cool — did you do all the metalwork for the body?
Reposted by Harrison Ritz
Very proud that this is finally out!
Come for the new auditory illusion, stay for the brain imaging and speech analysis…..
Come for the new auditory illusion, stay for the brain imaging and speech analysis…..
Humans can use positive and negative spectrotemporal correlations to detect rising and falling pitch
Humans can use positive and negative spectrotemporal correlations to detect rising and falling pitch
Nature Human Behaviour, Published online: 09 February 2026; doi:10.1038/s41562-025-02371-7Vaziri et al. examined how humans detect changes in auditory pitch, revealing that listeners rely on correlations in sound intensity over frequency and time, processing that is reminiscent of visual motion detection.
dlvr.it
February 9, 2026 at 8:41 PM
Very proud that this is finally out!
Come for the new auditory illusion, stay for the brain imaging and speech analysis…..
Come for the new auditory illusion, stay for the brain imaging and speech analysis…..
aw that sucks.
so what is a thrux?
so what is a thrux?
February 9, 2026 at 8:43 PM
aw that sucks.
so what is a thrux?
so what is a thrux?
February 9, 2026 at 7:15 PM
Reposted by Harrison Ritz
Posterior-SBC now also with peer-review stamp in Statistics and Computing doi.org/10.1007/s112... (update your bib files)
February 9, 2026 at 5:00 PM
Posterior-SBC now also with peer-review stamp in Statistics and Computing doi.org/10.1007/s112... (update your bib files)
then zenon is the one wearing a mask 😏
February 8, 2026 at 12:44 AM
then zenon is the one wearing a mask 😏
it’s emergent though, right?
February 8, 2026 at 12:07 AM
it’s emergent though, right?
Reposted by Harrison Ritz
Well-predicting machine learning in no way means that you can understand how the world works.
open.substack.com/pub/kording/...
open.substack.com/pub/kording/...
Forward vs Inverse problems: why high performance machine learning usually means little about how the world works
Understanding causality from machine learning is unfortunately usually impossible; life sciences take note
open.substack.com
February 7, 2026 at 6:31 PM
Well-predicting machine learning in no way means that you can understand how the world works.
open.substack.com/pub/kording/...
open.substack.com/pub/kording/...
Reposted by Harrison Ritz
MEG meets fMRI!
Quantum Sensing MRI for Noninvasive Detection of Neuronal Electrical Activity in Human Brains
arxiv.org/abs/2601.16423
Quantum Sensing MRI for Noninvasive Detection of Neuronal Electrical Activity in Human Brains
arxiv.org/abs/2601.16423
February 6, 2026 at 10:28 PM
MEG meets fMRI!
Quantum Sensing MRI for Noninvasive Detection of Neuronal Electrical Activity in Human Brains
arxiv.org/abs/2601.16423
Quantum Sensing MRI for Noninvasive Detection of Neuronal Electrical Activity in Human Brains
arxiv.org/abs/2601.16423
looks like an awesome setup for brms
First release of stanflow! v0.1.0 was a few days later than I'd like, but its up now.
Stanflow is a metapackage a la tidyverse for a Stan Bayesian workflow--see the README for more details/features!
Feedback/issues/PRs are always appreciated.
#rstats #bayes
Stanflow is a metapackage a la tidyverse for a Stan Bayesian workflow--see the README for more details/features!
Feedback/issues/PRs are always appreciated.
#rstats #bayes
GitHub - VisruthSK/stanflow: R Package for a Mildly Opinionated Stan Bayesian Workflow
R Package for a Mildly Opinionated Stan Bayesian Workflow - VisruthSK/stanflow
github.com
February 6, 2026 at 6:09 PM
looks like an awesome setup for brms
Reposted by Harrison Ritz
New Journal Club: Neural manifolds are maturing from visualization trick to biological claim. But if population activity lives on low-dimensional manifolds, what constrains the geometry?
Manifolds, Dendrites, and the Geometry of Neural Computation
The population doctrine—the view that populations, not individual neurons, constitute the fundamental unit of computation—has been gaining ground for years.
open.substack.com
February 6, 2026 at 2:23 AM
New Journal Club: Neural manifolds are maturing from visualization trick to biological claim. But if population activity lives on low-dimensional manifolds, what constrains the geometry?
so I have to watch nirvana the show the band now eh
February 6, 2026 at 1:48 AM
so I have to watch nirvana the show the band now eh
Reposted by Harrison Ritz
The visual world is composed of objects, and those objects are composed of features. But do VLMs exploit this compositional structure when processing multi-object scenes? In our 🆒🆕 #ICLR2026 paper, we find they do – via emergent symbolic mechanisms for visual binding. 🧵👇
February 5, 2026 at 8:55 PM
The visual world is composed of objects, and those objects are composed of features. But do VLMs exploit this compositional structure when processing multi-object scenes? In our 🆒🆕 #ICLR2026 paper, we find they do – via emergent symbolic mechanisms for visual binding. 🧵👇
Reposted by Harrison Ritz
Excited to share our chapter "Breaking the Tug-of-War: What Neuroeconomics Can Gain by Moving Past Competition-Only Models" with Yi-Hsin Su, Romy Frömer, and @ashenhav.bsky.social, now out in the new volume, "Neuroeconomics: Core Topics and Current Directions"!
doi.org/10.1007/978-3-032-02925-6_10
doi.org/10.1007/978-3-032-02925-6_10
Breaking the Tug-of-War: What Neuroeconomics Can Gain by Moving Past Competition-Only Models
Popular models of decision-making characterize choice dynamics as a tug-of-war process, where evidence for competing options accumulates until a threshold is reached. While these models capture severa...
doi.org
February 5, 2026 at 7:48 AM
Excited to share our chapter "Breaking the Tug-of-War: What Neuroeconomics Can Gain by Moving Past Competition-Only Models" with Yi-Hsin Su, Romy Frömer, and @ashenhav.bsky.social, now out in the new volume, "Neuroeconomics: Core Topics and Current Directions"!
doi.org/10.1007/978-3-032-02925-6_10
doi.org/10.1007/978-3-032-02925-6_10
nice! happy to chat :)
February 5, 2026 at 2:26 AM
nice! happy to chat :)
Reposted by Harrison Ritz
After 20 years as psychology's golden child, ego depletion collapsed. Now it's back...with a catch. The secret? Make people work for 30-40 minutes instead of 5. In other words, we finally discovered fatigue.
New post on the redemption tour.
New post on the redemption tour.
Congratulations, You've Discovered Fatigue
Just when I thought I was out, they pull me back in.
www.speakandregret.michaelinzlicht.com
February 4, 2026 at 1:26 PM
After 20 years as psychology's golden child, ego depletion collapsed. Now it's back...with a catch. The secret? Make people work for 30-40 minutes instead of 5. In other words, we finally discovered fatigue.
New post on the redemption tour.
New post on the redemption tour.
Coincidently, we had a bit of a collapsing bound — I submitted the final round of revisions from the delivery room 😂
February 4, 2026 at 2:04 PM
Coincidently, we had a bit of a collapsing bound — I submitted the final round of revisions from the delivery room 😂
Some additional thoughts here:
1. Fitting was tricky. IBS+BADS worked surprisingly well, but could be better (eg the model comparison isn’t perfect)
2. We used collapsing bounds for LCA, but not committed to this. Cool new work on how accumulators might mimic bound collapse: osf.io/preprints/ps...
1. Fitting was tricky. IBS+BADS worked surprisingly well, but could be better (eg the model comparison isn’t perfect)
2. We used collapsing bounds for LCA, but not committed to this. Cool new work on how accumulators might mimic bound collapse: osf.io/preprints/ps...
February 4, 2026 at 1:33 PM
Some additional thoughts here:
1. Fitting was tricky. IBS+BADS worked surprisingly well, but could be better (eg the model comparison isn’t perfect)
2. We used collapsing bounds for LCA, but not committed to this. Cool new work on how accumulators might mimic bound collapse: osf.io/preprints/ps...
1. Fitting was tricky. IBS+BADS worked surprisingly well, but could be better (eg the model comparison isn’t perfect)
2. We used collapsing bounds for LCA, but not committed to this. Cool new work on how accumulators might mimic bound collapse: osf.io/preprints/ps...