Guillaume Pech

Robustness is better assessed with a few thoughtful models than with billions of regressions | PNAS Robustness is better assessed with a few thoughtful models than with billions of regressions

Great piece on the absurdity of brute force multiverse analyses.

www.pnas.org/doi/10.1073/...

We used recent tools to analyze the prevalence of the effect (Bayesian Prevalence elifesciences.org/articles/62461 developed by @robince.bsky.social) within our sample, and observed that some participants implictly associate a positive valence with agency, while others associate a negative one.

Our study suggest that we explicitly say yes, but implicitly we seem not to attribute a specific valence, or at least, it depends on who is experiencing agency.

New preprint! Do you prefer to act rather than not to act? We investigate whether the sense of agency is valenced, with Inès Mentec; Charlotte Auger, Murielle Coulibaly, Martine Malaise, Matéo Vandeville, and @axc.bsky.social leveraging explicit and implicit methods.
osf.io/preprints/ps...

New research in Rwanda has started ! We continue to try to understand what differs those who participate in a génocide, and those who instead risk their lives to save others.

Here is a picture of our novel and ecological risk-taking task, inspired by the BART.

Transitions in dynamical regime and neural mode during perceptual decisions - Nature Simultaneous recordings were made of hundreds of neurons in the rat frontal cortex and striatum, showing that decision commitment involves a rapid, coordinated transition in dynamical regime and neura...

How does the brain decide? 🧠

Our new @nature.com paper shows that neural activity switches from an 'evidence gathering' to a 'commitment' state at a precise moment we call nTc.

After nTc, new evidence is ignored, revealing a neural marker for the instant when the mind is made up.

rdcu.be/eGUrv

Precise temporal localisation of M/EEG effects with Bayesian generalised additive multilevel models Time-resolved electrophysiological measurements such as those obtained through magneto- and electroencephalography (M/EEG) offer a unique window onto the neural activity underlying cognitive processes...

Happy to share a new preprint in which @paulbuerkner.com and I introduce a novel model-based approach for precisely estimating the onset and offset of M/EEG effects!

www.biorxiv.org/content/10.1...

.@smfleming.bsky.social @onemorebrown.bsky.social and @axc.bsky.social have published a theoretical paper titled “Computational higher-order theories of consciousness” as a book chapter. See the preprint here. philarchive.org/archive/FLECHT

A multi-measurement study of the relation between deliberation and volition Abstract. Historically, voluntary action and volition more generally have been investigated through the lens of meaningless decisions. Importantly, these f

🚨 New article in #NCONSC

A multi-measurement study of the relation between deliberation and volition

academic.oup.com/nc/article/2...

#consciousness
🧠🧪

The idea behind this measure is that voluntary action requires an effort that involuntary action does not.

Thanks to Elisabeth Pacherie, @emiliecaspar.bsky.social , @axc.bsky.social , Uri Maoz for their help to this work. 4/4

Moreover, we introduce another measure of volition that aligns with the measures mentioned above: the effort exerted in reporting the decisions. More specifically, participants selected their answers using handgrips that measured the effort exerted. 3/N

Our study indicates that self-reported volition, the Readiness Potential, and the Temporal Binding increase when making decisions that could increase our remuneration compared to decisions that did not. This was not observed when contrasting decisions that involved more or less deliberation. 2/N

A multi-measurement study of the relation between deliberation and volition Abstract. Historically, voluntary action and volition more generally have been investigated through the lens of meaningless decisions. Importantly, these f

In this new study academic.oup.com/nc/article-a...
we investigated how adding consequence to one's decision, and increasing the degree of deliberation, impacted different markers of voluntary action. /N

No confidence, only opinion « I found » « I see » I just wanted to help with my understanding of it not as an expert but as someone interested in these questions :) I think that if you want to help people understanding your claims it’s valuable to have input of what are the peoples understanding

I will be (maybe wronngly) more confident if it’s just M differences rather than S differences 2/2

If there is 5 studies, 1 finding a significant effect, 4 that doesn’t, I have the impression that it give extra information to know the magnitude of the effects and their sign in order to evaluate if it is worth trying to pursue this line of research. 1/2

Ok, I thought that type S and M were from a bayesian framework, which do not adress the uncertainty about long run sampling, but rather the uncertainty of observed data in combination with prior beliefs.

For the S error, I just see that as a different philosophy, not thinking about the long run sampling. I found sometimes type I & II error confusing as we never conduct the same study in psychology.

I found the M error pretty convincing. For instance a study claiming 20% effect of a treatment but other studies replicating 5% effects might be considered as a failed replication even though all significant, because the first did a M error.

📌

New paper on the neural mechanisms associated with resistance to immoral orders in civilian and military populations

@leslie-tricoche.bsky.social, Antonin Rovai & Salvatore Lo Bue

Open Access: journals.plos.org/plosone/arti...
@moralsocialbrain.bsky.social @erc.europa.eu BIAL @ghentccn.bsky.social

If you are interested in pursuing a PhD in cognitive neuroscience, specially targeting conscious vs. unconscious processing, contact me. We are recruiting 🙏🧠 please RT

Is it time to bring back natural philosophy? - ABC listen Once upon a time, what we now call scientists were known as "natural philosophers". These were people who studied the physical universe through observation and logic, using philosophical methods and r...

Is it time to bring back natural philosophy? For ABC (Australia)'s "The Philosopher's Zone", I spoke with @seanmcarroll.bsky.social , @sandradmitchell.bsky.social @melaniemitchell.bsky.social , @anilseth.bsky.social , David Albert, and Alan Guth:
www.abc.net.au/listen/progr... #science #philosophy

How jazz and dolphins can help explain consciousness | Aeon Essays Is consciousness like jazz, something hard to pin down? Or is it more like the biology of dolphins, odd but natural?

aeon.co/essays/how-j...

But in this commentary, we argue that does Centaur does *not* provide a better account of any psychological findings compared to previous models. Centaur is model without a theory. osf.io/preprints/ps...

Very pleased to say that we are (almost) ready for the 1.0.0 of our HMP #Python package to decompose #EEG into single-trial task related events:
github.com/GWeindel/hmp

There's now a nice documentation:
hmp.readthedocs.io/en/latest/we...

We just need some beta testers, thus RT appreciated!

What is the most compelling book providing an overview of the successes and worthwhile contributions that psychology has made over the last century? Has it even been written? As just one example, in my Human Factors course I would discuss the 3rd break light. stanley-r-harris.co.uk/blog/why-do-...

"Defining deliberation for dual-process models of reasoning" is now published. Free online access to the published Nat Rev Psy version: rdcu.be/erM5T

In 2024, Infant and Child Development (ICD) withdrew as a PCI RR-friendly journal and reneged on three Stage 1 recommendations issued by PCI RR. In addition, Wiley – the publisher of ICD – notified PCI RR and the PCI core team of its decision to withdraw all Wiley journals from PCI and PCI RR, including an additional 9 PCI-friendly journals. Finally, Wiley appears to have banned all of its ~1600 journals from considering submissions that have been previously reviewed by PCI or PCI RR. This statement explains the history of ICD joining PCI RR and developments that led to the current outcome. The PCI RR Managing Board believes that this shift in policy to become “PCI-hostile” renders Wiley journals incompatible not only with community-based preprint review but with preprint archiving in general.

NEW: Statement from the PCI RR Managing Board on the withdrawal of Infant and Child Development as a PCI RR-friendly journal, and the decision by Wiley to refuse preprints that have been peer-reviewed by @peercommunityin.bsky.social / @pci-regreports.bsky.social

Read here ➡️ osf.io/tn8mh

Reply to: Reply to: False positives in the study of memory-related gene expression In the Nature paper “Spatial transcriptomics reveal neuron–astrocyte synergy in long-term memory” published on March 14th, 2024, authors Sun et al. claimed to identify cell-type specifi…

I wrote a review of a recent paper on false discovery and multiple testing correction. liorpachter.wordpress.com/2025/06/16/r...