Julian Matthews
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quining.bsky.social
Julian Matthews
@quining.bsky.social
510 followers 390 following 43 posts
Research Fellow at Queensland University of Technology
cognitive science, philosophy of mind, metacognition, consciousness.

(he/him) 🇦🇺➡️🇯🇵➡️🇦🇺
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quining.bsky.social
Huge thanks to the amazing team @RIKEN_CBS and editors/reviewers at @commspsychol.nature.com !

Kazuhisa Shibata, Hiroki Ohashi, Sofia Nagisa, & Narumi Sugihara 🙌
September 30, 2025 at 8:19 AM
quining.bsky.social
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.
September 30, 2025 at 8:11 AM
quining.bsky.social
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.
September 30, 2025 at 8:11 AM
quining.bsky.social
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!
January 17, 2025 at 7:45 AM
quining.bsky.social
Wish I could be there! Bryan is a fantastic instructor.
November 25, 2024 at 4:29 AM
quining.bsky.social
Congrats Huw! I genuinely look forward to reading it.
November 19, 2024 at 1:59 AM
quining.bsky.social
Keen to be added 👍
November 13, 2024 at 1:55 PM