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Julian Matthews

@quining.bsky.social
542 followers 391 following 43 posts

Research Fellow at Queensland University of Technology cognitive science, philosophy of mind, metacognition, consciousness. (he/him) 🇦🇺➡️🇯🇵➡️🇦🇺

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Julian Matthews @quining.bsky.social · 08/10/2025
It was a pleasure publishing with CommsPsychol in the RR format. Highly recommended! 🌟
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Julian Matthews @quining.bsky.social · 30/09/2025
Huge thanks to the amazing team @RIKEN_CBS and editors/reviewers at @commspsychol.nature.com ! Kazuhisa Shibata, Hiroki Ohashi, Sofia Nagisa, & Narumi Sugihara 🙌
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Julian Matthews @quining.bsky.social · 30/09/2025
The result: negligible effect ⚡ Metacognitive efficiency is robust to report order—it need not constrain study design and secondary analysis... But watch out if you use regression measures?! 😱 See the full story here: 👉 www.nature.com/articles/s44... #psychology #OpenScience #neuroscience
A plot from the paper that shows negligible effect of limiting time or motor preparation on metacognitive efficiency measures.A plot from the paper that shows negligible effect of report order on metacognitive efficiency measures.
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Julian Matthews @quining.bsky.social · 30/09/2025
We tested this directly, 2 experiments (perception & memory, n=175) controlling for ⏱️ timing and ✋ motor preparation. 7 registered hypotheses and 3 different measures unpacked order bias from all angles.
A figure from the paper illustrating the study design:

Three report orders determine the arrangement of task decisions and confidence ratings: (1) decision followed by confidence, (2)decision simultaneous with confidence, and (3) confidence followed by decision.Three report contexts test the influence of reaction time and motor preparation. (1)In the time limited context, participants had 2.8 seconds in total to make the task decision and confidence rating. The response annulus appeared at a new, random angle on each trial. (2) In the baseline context, participants had unlimited time toreport, but the response annulus appeared at a new, random angle on each trial. (3)In the motor fixed context, participants had unlimited time to report, and the response annulus was fixed in the same position on every trial. An orange spot is added to each annulus in this figure to aid in visualising the rotation. This spot was not presented to participants.
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Julian Matthews @quining.bsky.social · 30/09/2025
🚨 Out now in @commspsychol.nature.com 🚨 doi.org/10.1038/s442... Our #RegisteredReport tested whether the order of task decisions and confidence ratings bias #metacognition. Some said decisions → confidence enhances metacognition. If true, decades of findings will be affected.
A picture of our paper's abstract and title: The order of task decisions and confidence ratings has little effect on metacognition.

Task decisions and confidence ratings are fundamental measures in metacognition research, but using these reports requires collecting them in some order. Only three orders exist and are used in an ad hoc manner across studies. Evidence suggests that when task decisions precede confidence, this report order can enhance metacognition. If verified, this effect pervades studies of metacognition and will lead the synthesis of this literature to invalid conclusions. In this Registered Report, we tested the effect of report order across popular domains of metacognition and probed two factors that may underlie why order effects have been observed in past studies: report time and motor preparation. We examined these effects in a perception experiment (n = 75) and memory experiment (n = 50), controlling task accuracy and learning. Our registered analyses found little effect of report order on metacognitive efficiency, even when timing and motor preparation were experimentally controlled. Our findings suggest the order of task decisions and confidence ratings has little effect on metacognition, and need not constrain secondary analysis or experimental design.
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Mel Goodale @action-brain.bsky.social · 03/06/2025
CIFAR invites applications for senior PhD and postdocs to participate in the Neuroscience of Consciousness Winter School, held in Montebello, Canada Dec 10-12, 2025. The Winter School is hosted by members of CIFAR’s Brain, Mind, and Consciousness program. Please repost. cifar.ca/next-generat... 🧠🧪
Dog-sled going past the Le Château Montebello.Main public room in Le Château Montebello decorated for Christmas. The building is the world's largest "log cabin".Le Château Montebello is situated on the banks of the Ottawa river, separating Quebec and Ontario.Group photo the school of 2018 at the Winter school on the Neuroscience of Consciousness
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Julian Matthews @quining.bsky.social · 30/04/2025
My family and I will take part in the Memory Walk this year supporting those living with dementia and their current/former carers ♥️ We would appreciate any donations you can spare: www.memorywalk.com.au/fundraisers/...
memorywalk.com.au
Help Anna Raise Funds To Beat Dementia!
On Saturday, 24 May, I'm taking part in Redcliffe's Memory Walk & Jog to raise funds to support Australians impacted by dementia. This is a cause close to my heart and I would love your support. Pleas...
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Communications Psychology @commspsychol.nature.com · 13/03/2025
Using a confidence-accuracy dissociation paradigm, the study finds that multisensory integration follows subjective confidence instead of objective accuracy. Further modeling suggests shared computations between confidence and multisensory integration. www.nature.com/articles/s44...
nature.com
Automatic multisensory integration follows subjective confidence rather than objective performance - Communications Psychology
Using a confidence-accuracy dissociation paradigm, the study finds that multisensory integration follows subjective confidence instead of objective accuracy. Further modeling suggests shared computati...
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Julian Matthews @quining.bsky.social · 17/01/2025
A good point Ken, exacerbated by large indiv. differences in metacog across the gen. population. Some of these data (eg @hohwy.bsky.social & mine, w/ descriptions of each participant from our neurologist collaborators) are publicly available. A good opportunity for indiv. diff. analysis imo!
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Julian Matthews @quining.bsky.social · 17/01/2025
Lovely/comprehensive review of metacognition and functional neurological disorder; a condition that demands a metacognitive interpretation: doi.org/10.1093/brai... The emerging picture aligns with findings in psychopathology more broadly—metacognitive performance is often equivalent to controls.
doi.org
Going ‘meta’: a systematic review of metacognition and functional neurological disorder
Sadnicka et al., overview experimental data that has examined metacognition in patients with functional neurological disorders (FND). Interestingly, most s
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That guy Maks @callmesipo.bsky.social · 03/12/2024
Having now read two dozen or so ARC Discovery Project EOIs the best advice I can give everyone preparing one is to simplify their writing a lot. You're not writing for experts, the whole College of Experts is involved, you'll have people who have no clue about your discipline assessing this
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Julian Matthews @quining.bsky.social · 25/11/2024
Wish I could be there! Bryan is a fantastic instructor.
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Shawn Prest @shawnprest.bsky.social · 25/11/2024
Excited to be here with @bethfisher.bsky.social and Mengting Zhang from @monash-m3cs.bsky.social at ACNS mers.cventevents.com/event/ACNS20... @acnsau.bsky.social I'll be presenting active inference modelling work on meditative deconstruction and letting go.
mers.cventevents.com
HOME - ACNS 2024 Conference
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megan peters 🧠 @meganakpeters.bsky.social · 22/11/2024
now out in Cerebral Cortex! my newest opinion piece, "Introspective psychophysics for the study of subjective experience" #neuroskyence #neuroAI #consciousness #introspection #psychology academic.oup.com/cercor/advan...
academic.oup.com
Introspective psychophysics for the study of subjective experience
Abstract. Studying subjective experience is hard. We believe that pain is not identical to nociception, nor pleasure a computational reward signal, nor fea
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megan peters 🧠 @meganakpeters.bsky.social · 22/11/2024
finally published! Optimal metacognitive decision strategies in signal detection theory -- with the brilliant Brian Maniscalco and Lucie Charles #neuroskyence #neuroAI #metacognition #consciousness #psychology link.springer.com/article/10.3...
link.springer.com
Optimal metacognitive decision strategies in signal detection theory - Psychonomic Bulletin & Review
Signal detection theory (SDT) has long provided the field of psychology with a simple but powerful model of how observers make decisions under uncertainty. SDT can distinguish sensitivity from respons...
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Matthias Michel @matthiasmichel.bsky.social · 22/11/2024
In this new preprint @smfleming.bsky.social and I present a new theory of the functions and evolution of conscious vision. This is a big project: osf.io/preprints/ps.... We'd love to get your comments!
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Australasian Cognitive Neuroscience Society @acnsau.bsky.social · 18/11/2024
Hello world! Australasian Cognitive Neuroscience Society is on bsky! #ACNSnews
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Julian Matthews @quining.bsky.social · 19/11/2024
Congrats Huw! I genuinely look forward to reading it.
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Julian Matthews @quining.bsky.social · 18/11/2024
ABC's Philosopher's Zone is a favourite of mine from the radio station's stable. Here's the wonderful recent episode on animal+ sentience with @birchlse.bsky.social www.abc.net.au/listen/progr...
abc.net.au
Sentience - ABC listen
Sentience is a puzzle - and an increasingly important one. The question of exactly what constitutes sentience, and which organisms possess it, is hotly contested. But with scientific evidence emerging...
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Dr Emily Colton @ecoltonpsych.bsky.social · 18/11/2024
Is perceptual novelty important in your research? We created, standardised, and validated a database of truly novel perceptual stimuli (matched to BOSS objects on size, contrast, luminance & colourfulness) so you don't have to! www.nature.com/articles/s41... #cogpsy #psychology #EEG #neuroskyence
nature.com
Standardised images of novel objects created with generative adversarial networks - Scientific Data
Scientific Data - Standardised images of novel objects created with generative adversarial networks
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Patrick Cooper @neurocoops.bsky.social · 15/11/2024
Our latest work, up as a preprint to enjoy. We gave LLMs tasks adapted from experimental psychology to see how they contribute to teamwork. We found LLMs were reasonable at monitoring tasks but were poor at tasks requiring planning and strategising.
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Steve Fleming @smfleming.bsky.social · 13/11/2024
It was only a matter of time - a metacognition starter pack! Do let me know if I’ve missed people or if you’d like to be added #neuroskyence 🧪 go.bsky.app/9PSjwLF
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Francesco Poli @francescopoli.bsky.social · 13/11/2024
In our latest work on curiosity, we show how autistic traits influence free exploration! Out now in PLOSCompBiol! journals.plos.org/ploscompbiol...
journals.plos.org
Autistic traits foster effective curiosity-driven exploration
Author summary Research has long recognized that individuals display curiosity and explore their environments in order to learn. It is suggested that personal characteristics, including autistic trait...
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Timothy Brady @timbrady.bsky.social · 13/11/2024
New preprint where @mmrobinson93.bsky.social and I jump into the literature on meta-cognition (hopefully in a useful way!): osf.io/preprints/os... We show that a simple memory model (TCC) can be straightforwardly adapted to make predictions about confidence #neuroscience #psychscisky
Figure showing a key manipulation in the paper. A set of images or colors are remembered, and then the memory test pits an item you saw vs one that is similar to the tested item or another remembered item.
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Julian Matthews @quining.bsky.social · 13/11/2024
Keen to be added 👍
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Thomas Andrillon @thomasandrillon.bsky.social · 12/11/2024
I think it was missing to I created a Consciousness Science Starter Pack: go.bsky.app/T8z9NP4 I can still add ~90 people so if you want to jump in, let me know! And if you don't want to be there, let me know as well of course. The boundaries of consciousness research can be hard to determine!
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Steve Fleming @smfleming.bsky.social · 08/11/2024
Welcome Mel! Great to have you on here
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JASP @jaspstats.bsky.social · 29/10/2024
Hi Bluesky! ☀️ We are an open-source statistics program that is free, friendly, & flexible. Armed with an easy-to-use GUI, we enable both classical & Bayesian analyses. Over 340 universities in over 70 countries use JASP. Follow us to get notified on our latest features & stats news.
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Julian Matthews @quining.bsky.social · 08/10/2024
Super relevant for some of the things a group is studying at RIKEN, have passed it on!
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Patrick Cooper @neurocoops.bsky.social · 08/10/2024
Our latest paper: "Users do not trust recommendations from a large language model more than AI-sourced snippets” www.frontiersin.org/journals/com...
frontiersin.org
Frontiers | Users do not trust recommendations from a large language model more than AI-sourced snippets
BackgroundThe ability of large language models to generate general purpose natural language represents a significant step forward in creating systems able to...
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Julian Matthews @quining.bsky.social · 04/10/2024
I don't have a substack but I do make music in my free time 🐧 It's not everyday that a synthesiser turns 40. You can check out my new EP on bandcamp: julianpalindrone.bandcamp.com/album/so-thi...
julianpalindrone.bandcamp.com
so, this is 40, by palindrone
3 track album
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Alex Spahn 🌋🌪️☄️ @spahn711.bsky.social · 16/09/2024
I can't support Twitter anymore. I was going to hold out until after the election, but not with shit like this. I am shifting over to here on Bluesky. You may see some personal posts sprinkled in with my photos from here on out. Thanks for being a much nicer place to be. I love y'all. 💜
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Ben Fulcher @bendfulcher.bsky.social · 05/08/2024
New preprint by Rishi Maran, Eli Muller: "Analyzing the Brain's Dynamic Response to Targeted Stimulation using Generative Modeling" A review/perspective on why new mechanisms may be found by modeling brain stimulation dynamics 🧠⚡️ arxiv.org/abs/2407.19737
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Julian Matthews @quining.bsky.social · 02/07/2024
I will share our findings at #ASSC27 about the mental effort of #metacognition + its consequences for a famous metacognitive phenomenon… 1️⃣💦2️⃣ Catch it in Metacognition #1, Fukutake - Wed 03 July 5:30PM #PsychSciSky #neuroscience
Banner advertising "Metacognition is mentally demanding: revealing the cost and consequences of metacognitive effort". A concurrent talk at the 27th Meeting of the Association for the Scientific Study of Consciousness.
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Julian Matthews @quining.bsky.social · 20/06/2024
Bridge Road Brewing catering to a very specific Venn diagram that I absolutely exist within
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Julian Matthews @quining.bsky.social · 14/06/2024
Our RR answers this crucial question using perception 👁️ and memory 🧠 exps: figshare.com/s/ac8a6e6650... Huge thanks to our amazing team + editors/reviewers at Communications Psychology! Kaz Shibata, Hiroki Ohashi, Narumi Sugihara 🙌 #openscience #AcademicSky #PsychSciSky #neuroscience #scicomm
figshare.com
The effect of report order on metacognition: when should confidence be measured? [Registered Report Stage 1 Protocol]
ABSTRACT Task decisions and confidence ratings are fundamental measures in metacognition research, but using these reports requires collecting them in some order. Only three orders exist and are used...
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Julian Matthews @quining.bsky.social · 14/06/2024
We know that time ⏰ and movements 👋 affect metacognition. Yet many of us use a protocol that ensures a time-consuming action before every confidence rating. Would your results be the same if you used a different report order? 🤔
A flow diagram where "time" and "action" feed from a task decision into a confidence rating, causing it to be distorted.
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Julian Matthews @quining.bsky.social · 14/06/2024
🎉 Our #RegisteredReport on report order & #metacognition accepted-in-principle Communications Psychology! Why do we collect #confidence ratings after task decisions? As a grad student, this puzzled me. We used one order in every study, but others flipped it or collected both together 🔄
An drawing of someone considering three report orders: 1) decision then confidence, 2) decision and confidence, 3) confidence and decision.
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Julian Matthews @quining.bsky.social · 12/06/2024
AI "hallucinations": a kind of "controlled bullshit"? link.springer.com/article/10.1...
link.springer.com
ChatGPT is bullshit - Ethics and Information Technology
Recently, there has been considerable interest in large language models: machine learning systems which produce human-like text and dialogue. Applications of these systems have been plagued by persist...
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Julian Matthews @quining.bsky.social · 22/05/2024
Apart from metacognition, one of several other obsessions of mine is craft beer. Couldn't pass up an opportunity to visit Green Bench, the 'Burgs best hop & foeder technicians.
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Julian Matthews @quining.bsky.social · 17/05/2024
In this case, Vision Sciences Society meeting. Seems #VSS2024 is the other hashtag...
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Julian Matthews @quining.bsky.social · 17/05/2024
#VSS and #metacognition? Stop by my poster on Sunday and let's discuss the mental cost of perceptual metacognition and confidence.
A banner advertising my poster "Metacognition is mentally demanding" at the 2024 Vision Sciences Society meeting. 

I will present poster 33.310 on Sunday, May 19 from 8:30am to 12:30pm in the session "Decision making: perceptual decision making 2".
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Julian Matthews @quining.bsky.social · 17/05/2024
Looking forward to these!
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Kelsey Perrykkad @kperrykkad.bsky.social · 09/05/2024
Our paper about the sense of self in first time pregnancy is out now in npj women's health! 🪞🤰 Check it out: rdcu.be/dHja6 #psysky #psychology #reprosky #🧠
Graphical abstract for the paper. The top panel shows findings that compared to never been pregnant peers, women pregnant for the first time show more body estrangement, more often feel out of control, more body visibility, greater attractiveness, femininity, pride, confidence and poorer learning. The bottom half of the figure depicts changes by trimester such that the first trimester is associated with a dip in sense of self, the second trimester shows consolidation so that the self is stronger in pregnant women than non pregnant peers and a relative return to baseline by the third trimester.
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hakwan lau @hakwan.bsky.social · 15/03/2024
hello friends in Japan (& elsewhere), there is a free conference on perceptual metacognition on July 1st in Tokyo. abstract submission deadline in two weeks. one downside is that i'll be speaking there. but the other speakers are gonna be great sites.google.com/view/asscmet... #neuroskyence
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Julian Matthews @quining.bsky.social · 14/03/2024
Revisions complete! This registered report has been a lot of work but an instructive process with some of the most helpful reviews I've ever received. We're not done yet but it feels like how science should work, drawing on external expertise to improve experiments at the design stage.
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Julian Matthews @quining.bsky.social · 13/02/2024
A few people have reached out for the materials to our cognitive effort decision making task published in Cognition. I try to upload and contextualise all of the code supporting my publications. Here's the one for cognitive effort: github.com/julian-matth...
github.com
GitHub - julian-matthews/cognitive-fatigue-paradigm: Experiment code for our cognitive effort decision making paradigm published in Cognition.
Experiment code for our cognitive effort decision making paradigm published in Cognition. - julian-matthews/cognitive-fatigue-paradigm
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Jorge Morales @jorgemorales.me · 19/01/2024
Vision science peeps, help needed! My grad student has been trying to replicate *very basic* Posner cueing online... to no avail. We've tried several times with Prolific subjects; quadruple-checked our code, and nothing. Valid cues at variable CTOAs are still slower than invalid cues. Any clues?!
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Audrey Mazancieux @audreymazancieux.bsky.social · 18/01/2024
Interested in the evolution of domain-general confidence from young adults to older adults? Check our new preprint led by Lucile Meunier with Céline Souchay, @smfleming.bsky.social, Christine Bastin, Chris Moulin, Lucie Angel, and myself! osf.io/preprints/os...
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Dr. Indrit Bègue @indritbegue.bsky.social · 03/12/2023
I am looking for a postdoc to work with me! www.linkedin.com/jobs/view/37... #neuroskyence #academicsky
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