Three preregistered experiments with prolific participants (N = 2,254) found no evidence for experimenter demand effects
osf.io/preprints/ps...
osf.io/preprints/ps...
November 12, 2025 at 1:20 PM
Three preregistered experiments with prolific participants (N = 2,254) found no evidence for experimenter demand effects
osf.io/preprints/ps...
osf.io/preprints/ps...
"you should have preregistered" ok congrats on discovering my insidious plan to manipulate data to produce null results?
April 28, 2025 at 6:19 PM
"you should have preregistered" ok congrats on discovering my insidious plan to manipulate data to produce null results?
THE JAMES WEBB TELESCOPE WASN'T PREREGISTERED, TAKE THAT IDIOTS!
The discourse on this can swing into wild, silly places:
(this whole thing is actually hilarious imo www.cambridge.org/core/journal...)
(this whole thing is actually hilarious imo www.cambridge.org/core/journal...)
June 4, 2026 at 12:53 PM
THE JAMES WEBB TELESCOPE WASN'T PREREGISTERED, TAKE THAT IDIOTS!
Preregistration was common: 74.6% of articles included at least one preregistered study.
Of those, 42 (84%) had at least one deviation from the preregistered plan.
And 17 of those 42 disclosed none of their deviations.
Of those, 42 (84%) had at least one deviation from the preregistered plan.
And 17 of those 42 disclosed none of their deviations.
September 25, 2026 at 2:15 PM
Preregistration was common: 74.6% of articles included at least one preregistered study.
Of those, 42 (84%) had at least one deviation from the preregistered plan.
And 17 of those 42 disclosed none of their deviations.
Of those, 42 (84%) had at least one deviation from the preregistered plan.
And 17 of those 42 disclosed none of their deviations.
My preregistered take: after a Harris victory, pundits will say that a female candidate at the top of the ticket post-Dobbs was a bigger factor than anticipated
November 5, 2024 at 3:46 AM
My preregistered take: after a Harris victory, pundits will say that a female candidate at the top of the ticket post-Dobbs was a bigger factor than anticipated
I'm so happy to see this monster finally out - a preregistered metaanalysis of youth personality-psychopathology associations with a bonus preregistered independent replication metaanalysis! Years in the making, now out in Psychological Bulletin.
psycnet.apa.org/record/2027-...
psycnet.apa.org/record/2027-...
APA PsycNet
psycnet.apa.org
April 30, 2026 at 3:39 PM
I'm so happy to see this monster finally out - a preregistered metaanalysis of youth personality-psychopathology associations with a bonus preregistered independent replication metaanalysis! Years in the making, now out in Psychological Bulletin.
psycnet.apa.org/record/2027-...
psycnet.apa.org/record/2027-...
AI-driven manipulation comes in three forms, each tested in our research:
• Deepfake videos
• AI-generated misinformation articles
• Personality-targeted political ads
We ran multiple preregistered experiments to see if warnings protect people.
Spoiler: They largely don't.
2/10
• Deepfake videos
• AI-generated misinformation articles
• Personality-targeted political ads
We ran multiple preregistered experiments to see if warnings protect people.
Spoiler: They largely don't.
2/10
April 1, 2026 at 6:33 PM
AI-driven manipulation comes in three forms, each tested in our research:
• Deepfake videos
• AI-generated misinformation articles
• Personality-targeted political ads
We ran multiple preregistered experiments to see if warnings protect people.
Spoiler: They largely don't.
2/10
• Deepfake videos
• AI-generated misinformation articles
• Personality-targeted political ads
We ran multiple preregistered experiments to see if warnings protect people.
Spoiler: They largely don't.
2/10
My haircut was preregistered..
October 20, 2023 at 8:51 PM
My haircut was preregistered..
Lastly and for clarity: 'Forgetting to preregister some analyses' is not an acceptable framing for having completely preregistered a study and analyses in detail but deciding not to write up the preregistered version and pivoting the entire story of the paper as if it were something else all along.
August 14, 2026 at 3:41 PM
Lastly and for clarity: 'Forgetting to preregister some analyses' is not an acceptable framing for having completely preregistered a study and analyses in detail but deciding not to write up the preregistered version and pivoting the entire story of the paper as if it were something else all along.
My PhD student @aycaaksu.bsky.social is presenting 3 preregistered experiments examining how progressive men are perceived in society. We found progressive men is often highly associated with positive behaviors whole less so with negative behaviors. Great job Ayca.
December 12, 2024 at 1:08 PM
My PhD student @aycaaksu.bsky.social is presenting 3 preregistered experiments examining how progressive men are perceived in society. We found progressive men is often highly associated with positive behaviors whole less so with negative behaviors. Great job Ayca.
Okay just preregistered for the Sanremo ticket buying process LETS GOOOOOOOOOOO TICKET LOTTERIES
December 20, 2024 at 12:24 PM
Okay just preregistered for the Sanremo ticket buying process LETS GOOOOOOOOOOO TICKET LOTTERIES
Preregistering what I expect will happen in tonight’s VP debate:
(1) big-picture, it’ll be considered a draw.
(2) Walz will remind people who love him why they love him, and will continue to be his charming, relatable self.
(…)
(1) big-picture, it’ll be considered a draw.
(2) Walz will remind people who love him why they love him, and will continue to be his charming, relatable self.
(…)
October 2, 2024 at 3:22 AM
Penicillin was discovered bec Fleming followed up on the initial observation by designing studies to understand the mechanism producing it. The confirmatory (preregistered) tests vs. exploratory (non-preregistered) results distinction that is being normalized is exacerbating this misconception.
December 3, 2025 at 6:54 PM
Penicillin was discovered bec Fleming followed up on the initial observation by designing studies to understand the mechanism producing it. The confirmatory (preregistered) tests vs. exploratory (non-preregistered) results distinction that is being normalized is exacerbating this misconception.
LLMs good performance on medical exams does not translate to accurate performance in real-world settings (preregistered n~1,300 study). This can't be explained by current standard benchmarks for medical knowledge & simulated patient interactions.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reliability of LLMs as medical assistants for the general public: a randomized preregistered study - Nature Medicine
In a randomized controlled study involving 1,298 participants from a general sample, performance of humans when assisted by a large language model (LLM) was sensibly inferior to that of the LLM alone ...
www.nature.com
February 11, 2026 at 10:30 AM
LLMs good performance on medical exams does not translate to accurate performance in real-world settings (preregistered n~1,300 study). This can't be explained by current standard benchmarks for medical knowledge & simulated patient interactions.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
198 effect sizes in ego depletion resesrch showed an effect size of d=0.62. Preregistered large replications (including some by original authors) yielded an effect size of 0. No one has been able to offer any other explanation for this huge research waste than massive p-hacking.
February 23, 2026 at 8:03 PM
198 effect sizes in ego depletion resesrch showed an effect size of d=0.62. Preregistered large replications (including some by original authors) yielded an effect size of 0. No one has been able to offer any other explanation for this huge research waste than massive p-hacking.
Introducing RegCheck: a tool which uses Large Language Models to automatically compare preregistered protocols with their corresponding published papers and highlights deviations.
@malte.the100.ci @ianhussey.bsky.social @ruben.the100.ci @bjoernhommel.bsky.social
regcheck.app
@malte.the100.ci @ianhussey.bsky.social @ruben.the100.ci @bjoernhommel.bsky.social
regcheck.app
RegCheck.app
RegCheck is an AI tool to compare preregistrations with papers instantly.
regcheck.app
July 23, 2024 at 2:42 PM
Introducing RegCheck: a tool which uses Large Language Models to automatically compare preregistered protocols with their corresponding published papers and highlights deviations.
@malte.the100.ci @ianhussey.bsky.social @ruben.the100.ci @bjoernhommel.bsky.social
regcheck.app
@malte.the100.ci @ianhussey.bsky.social @ruben.the100.ci @bjoernhommel.bsky.social
regcheck.app
How many preregistered studies end up in the file drawer? 🗂️
Join us to find out from Eline Ensinck at the next ReproducibiliTea!
📅Nov 25, 3pm GMT
www.eventbrite.co.uk/e/are-prereg...
@tabeasch.bsky.social @reproducibilitea.org @uclopenscience.bsky.social @ukrepro.bsky.social @lakens.bsky.social
Join us to find out from Eline Ensinck at the next ReproducibiliTea!
📅Nov 25, 3pm GMT
www.eventbrite.co.uk/e/are-prereg...
@tabeasch.bsky.social @reproducibilitea.org @uclopenscience.bsky.social @ukrepro.bsky.social @lakens.bsky.social
Are Preregistered Studies Publicly Shared? With Eline Ensinck
Eline Ensinck will present research on the number of preregistered studies which are never published and the reasons behind this
www.eventbrite.co.uk
November 11, 2025 at 1:02 PM
How many preregistered studies end up in the file drawer? 🗂️
Join us to find out from Eline Ensinck at the next ReproducibiliTea!
📅Nov 25, 3pm GMT
www.eventbrite.co.uk/e/are-prereg...
@tabeasch.bsky.social @reproducibilitea.org @uclopenscience.bsky.social @ukrepro.bsky.social @lakens.bsky.social
Join us to find out from Eline Ensinck at the next ReproducibiliTea!
📅Nov 25, 3pm GMT
www.eventbrite.co.uk/e/are-prereg...
@tabeasch.bsky.social @reproducibilitea.org @uclopenscience.bsky.social @ukrepro.bsky.social @lakens.bsky.social
lol my school even outlawed having a whiteboard on your dorm room door. Sure sure the students are still allowed to protest! In a closed room between the hours of 9-5, at a suitable decibel level, as long as you’ve preregistered your protest first so that you can book a room (not even exaggerating)
February 6, 2025 at 5:24 PM
lol my school even outlawed having a whiteboard on your dorm room door. Sure sure the students are still allowed to protest! In a closed room between the hours of 9-5, at a suitable decibel level, as long as you’ve preregistered your protest first so that you can book a room (not even exaggerating)
Solid objects move as cohesive, bounded bodies. Stuff like sand, water or purée doesn't: it spreads, deforms and divides. Adults hold distinct expectations for Things and Stuff, but when does the distinction emerge? We tested 4–6- and 13–15-month-olds in a preregistered looking-time study. 2/5
September 25, 2026 at 8:55 PM
Solid objects move as cohesive, bounded bodies. Stuff like sand, water or purée doesn't: it spreads, deforms and divides. Adults hold distinct expectations for Things and Stuff, but when does the distinction emerge? We tested 4–6- and 13–15-month-olds in a preregistered looking-time study. 2/5
AI can help us learn hard-to-teach human skills, like showing empathy. Preregistered study of 968 people found almost no correlation between feeling empathic & communicating empathy. But a single practice session with an AI coach made people measurably better at it arxiv.org/pdf/2603.15245
March 22, 2026 at 2:33 PM
AI can help us learn hard-to-teach human skills, like showing empathy. Preregistered study of 968 people found almost no correlation between feeling empathic & communicating empathy. But a single practice session with an AI coach made people measurably better at it arxiv.org/pdf/2603.15245
Fun facts
- The original study reported 23 IQ point gains
- Jordan Peterson tweeted about it (sort of)
- @jamiecummins.bsky.social new preregistered RCT shows null effects
- The original study reported 23 IQ point gains
- Jordan Peterson tweeted about it (sort of)
- @jamiecummins.bsky.social new preregistered RCT shows null effects
April 7, 2026 at 8:29 AM
Fun facts
- The original study reported 23 IQ point gains
- Jordan Peterson tweeted about it (sort of)
- @jamiecummins.bsky.social new preregistered RCT shows null effects
- The original study reported 23 IQ point gains
- Jordan Peterson tweeted about it (sort of)
- @jamiecummins.bsky.social new preregistered RCT shows null effects
What do you do if you've been called a creep? Simply reshape from the ground up the entire landscape of intimate activity such that it only takes place in delimited settings where everybody has preregistered their consent to everything that could happen, possibly on the blockchain
September 27, 2026 at 4:42 PM
What do you do if you've been called a creep? Simply reshape from the ground up the entire landscape of intimate activity such that it only takes place in delimited settings where everybody has preregistered their consent to everything that could happen, possibly on the blockchain
Americans say they want less inequality. Why don’t they support policies to reduce it?
New paper: across 31 nationally representative survey waves (N=384,248) and a preregistered experiment (N=1,009), Americans favor PREdistributive over REdistributive policies 🧵
osf.io/preprints/so...
New paper: across 31 nationally representative survey waves (N=384,248) and a preregistered experiment (N=1,009), Americans favor PREdistributive over REdistributive policies 🧵
osf.io/preprints/so...
May 28, 2026 at 5:03 PM
Americans say they want less inequality. Why don’t they support policies to reduce it?
New paper: across 31 nationally representative survey waves (N=384,248) and a preregistered experiment (N=1,009), Americans favor PREdistributive over REdistributive policies 🧵
osf.io/preprints/so...
New paper: across 31 nationally representative survey waves (N=384,248) and a preregistered experiment (N=1,009), Americans favor PREdistributive over REdistributive policies 🧵
osf.io/preprints/so...
Oh look a preregistered take (ignore typos)
Tech can be a powerful tool for liberation but it am an also be a powerful tool for oppression and we don’t end up in the good future by sitting back and assuming things will work out for the best if we throw enough tech at them
Somehow the imaginations of all those creative SF-reading types didn't envision the actual dystopian future of the same bros and their companies selling both privacy and surveillance to different actors, including states, the kind of profitable arms race some people falsely believe gave us WW1.
2/2
2/2
June 26, 2026 at 2:28 AM
Oh look a preregistered take (ignore typos)
