David C. Vaidis
@vaidis.bsky.social
Professor in Social Psychology at Université de Toulouse, France
Interested in Psychological Science, Cognitive Dissonance, Meta-Science, Epistemology, History of Science, Societal Impact, Human Development...
Interested in Psychological Science, Cognitive Dissonance, Meta-Science, Epistemology, History of Science, Societal Impact, Human Development...
Réception de la 3e édition de l'incontournable Analyse des Donnees : Approche par Comparaison de Modèles.
Merci aux collègues 🙏 @vincentyzerbyt.bsky.social & @marinerougier.bsky.social pour cette réactualisation et l'opportunité d'entrainer doctorant-e-s dans ces approches structurantes !
Merci aux collègues 🙏 @vincentyzerbyt.bsky.social & @marinerougier.bsky.social pour cette réactualisation et l'opportunité d'entrainer doctorant-e-s dans ces approches structurantes !
February 6, 2026 at 3:29 PM
Réception de la 3e édition de l'incontournable Analyse des Donnees : Approche par Comparaison de Modèles.
Merci aux collègues 🙏 @vincentyzerbyt.bsky.social & @marinerougier.bsky.social pour cette réactualisation et l'opportunité d'entrainer doctorant-e-s dans ces approches structurantes !
Merci aux collègues 🙏 @vincentyzerbyt.bsky.social & @marinerougier.bsky.social pour cette réactualisation et l'opportunité d'entrainer doctorant-e-s dans ces approches structurantes !
📢 Post-doc position – Toulouse (France) 🇫🇷
A post-doctoral position (12 months) is open at CNRS in Toulouse to work with me on the relationship between signal detection theory, conspiracy beliefs, and perceptions of corruption...
🔗 emploi.cnrs.fr/Offres/CDD/U...
Feel free to share!
A post-doctoral position (12 months) is open at CNRS in Toulouse to work with me on the relationship between signal detection theory, conspiracy beliefs, and perceptions of corruption...
🔗 emploi.cnrs.fr/Offres/CDD/U...
Feel free to share!
Portail Emploi CNRS - Offre d'emploi - PhD contract on ANR COPYCAT : "Study of the relationship between conspiracist beliefs and perceptions of corruption" M/F
Assurez-vous que votre profil candidat soit correctement renseigné avant de postuler
emploi.cnrs.fr
January 22, 2026 at 8:39 AM
📢 Post-doc position – Toulouse (France) 🇫🇷
A post-doctoral position (12 months) is open at CNRS in Toulouse to work with me on the relationship between signal detection theory, conspiracy beliefs, and perceptions of corruption...
🔗 emploi.cnrs.fr/Offres/CDD/U...
Feel free to share!
A post-doctoral position (12 months) is open at CNRS in Toulouse to work with me on the relationship between signal detection theory, conspiracy beliefs, and perceptions of corruption...
🔗 emploi.cnrs.fr/Offres/CDD/U...
Feel free to share!
I'm not a big fan of rituals, but I truly wish us all a better world! Let's remember that people are not their governments. Several of the latter must be stopped now, while many of the former must be supported and empowered to change the game.
January 9, 2026 at 8:40 AM
I'm not a big fan of rituals, but I truly wish us all a better world! Let's remember that people are not their governments. Several of the latter must be stopped now, while many of the former must be supported and empowered to change the game.
Reposted by David C. Vaidis
Please, don't automate science!
Julian Togelius
Monday, December 08, 2025
togelius.blogspot.com/2025/12/plea...
Julian Togelius
Monday, December 08, 2025
togelius.blogspot.com/2025/12/plea...
Please, don't automate science!
I was at an event on AI for science yesterday, a panel discussion here at NeurIPS. The panelists discussed how they plan to replace humans a...
togelius.blogspot.com
December 8, 2025 at 11:07 AM
Please, don't automate science!
Julian Togelius
Monday, December 08, 2025
togelius.blogspot.com/2025/12/plea...
Julian Togelius
Monday, December 08, 2025
togelius.blogspot.com/2025/12/plea...
Reposted by David C. Vaidis
📢 Call for submissions for #SIPS2026!📢
The SIPS community will meet next year, and we look forward to seeing you at the conferences!
Don't forget to send your submission for the conference before January 23 (for the in-person conference) or February 27 (for the online conference).
The SIPS community will meet next year, and we look forward to seeing you at the conferences!
Don't forget to send your submission for the conference before January 23 (for the in-person conference) or February 27 (for the online conference).
SIPS 2026 – June 8-10, 2026
The submission portal for the conference is now open! We invite researchers to submit their contributions for both online and in-person SIPS 2026. We look forward to your participation!
buff.ly
December 9, 2025 at 4:02 PM
📢 Call for submissions for #SIPS2026!📢
The SIPS community will meet next year, and we look forward to seeing you at the conferences!
Don't forget to send your submission for the conference before January 23 (for the in-person conference) or February 27 (for the online conference).
The SIPS community will meet next year, and we look forward to seeing you at the conferences!
Don't forget to send your submission for the conference before January 23 (for the in-person conference) or February 27 (for the online conference).
What is the current position of @improvingpsych.org concerning the Washington meeting after the last Trump's administration proposal? Requiring 5 years of social media history, phone numbers, and email addresses is invasive and concerning for anyone who values privacy and freedom of thought.
US social media requirements for foreign visitors could have 'chilling effect' on travel, industry group says
A group representing the U.S. travel and tourism industry warned Monday that a proposal to require millions of foreign visitors to provide social media handles used over the past five years could have...
www.reuters.com
December 16, 2025 at 7:46 PM
What is the current position of @improvingpsych.org concerning the Washington meeting after the last Trump's administration proposal? Requiring 5 years of social media history, phone numbers, and email addresses is invasive and concerning for anyone who values privacy and freedom of thought.
Moreover, self-persuasion as well as self-perception do not rely on discomfort. Anyway, it makes me a feeling of déjà-vu and I believe we already had this discussion before! :) My main conclusion with the RRR is that the paradigm is flaw, but I cannot discard the whole theory with this results.
November 8, 2025 at 1:35 PM
Moreover, self-persuasion as well as self-perception do not rely on discomfort. Anyway, it makes me a feeling of déjà-vu and I believe we already had this discussion before! :) My main conclusion with the RRR is that the paradigm is flaw, but I cannot discard the whole theory with this results.
Yes but they were all informed about this tuition raise so they should all experienced such discomfort thus? But we observed the discomfort and conflict in the inconsistency behavior conditions with all ds > .66 and they all answered the same item about attitude. Not perfect, but not discarding.
November 8, 2025 at 1:33 PM
Yes but they were all informed about this tuition raise so they should all experienced such discomfort thus? But we observed the discomfort and conflict in the inconsistency behavior conditions with all ds > .66 and they all answered the same item about attitude. Not perfect, but not discarding.
It does make sense to consider that changing the others is a way to make the social reality consistent with your thoughts but the current experimental or observational evidence are scarce.
November 8, 2025 at 1:19 PM
It does make sense to consider that changing the others is a way to make the social reality consistent with your thoughts but the current experimental or observational evidence are scarce.
Only a few models, like the EIM could explain proselytism. More generally, the most common reactions to disconfirmation are maintain or change (or assimilation/accommodation, or exploitation/exploration; depending on your theoretical background), not proselytism.
November 8, 2025 at 1:17 PM
Only a few models, like the EIM could explain proselytism. More generally, the most common reactions to disconfirmation are maintain or change (or assimilation/accommodation, or exploitation/exploration; depending on your theoretical background), not proselytism.
I really did not want to write on this but as many people talk about it, I think it is necessary to restate some basic elements. The proselytism has never been a strong assumption (this is even sometime hard to explain why it should occurs).
I didn't want to get into this discussion, but after seeing strong reactions to Kelly (2025), I think it's worth helping colleagues think more critically about what the paper actually shows—and doesn't show.
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Debunking “When Prophecy Fails”
In 1954, Dorothy Martin predicted an apocalyptic flood and promised her followers rescue by flying saucers. When neither arrived, she recanted, her group dissolved, and efforts to proselytize ceased.....
onlinelibrary.wiley.com
November 8, 2025 at 1:14 PM
I really did not want to write on this but as many people talk about it, I think it is necessary to restate some basic elements. The proselytism has never been a strong assumption (this is even sometime hard to explain why it should occurs).
You should read Chapanis & Chapanis (1964)! They had almost the same conclusions more than 60 years ago! So nothing new here. But things move forward in the meantime.
November 8, 2025 at 1:10 PM
You should read Chapanis & Chapanis (1964)! They had almost the same conclusions more than 60 years ago! So nothing new here. But things move forward in the meantime.
So hard critic is okay to move forward but Science is much more.
a/ Read the papers (not just abstracts)
b/ Put them in perspective with the full literature
Critique the ethics AND maintain scientific rigor.
#replication #cognitivedissonance #scienticrigor
a/ Read the papers (not just abstracts)
b/ Put them in perspective with the full literature
Critique the ethics AND maintain scientific rigor.
#replication #cognitivedissonance #scienticrigor
November 8, 2025 at 1:04 PM
So hard critic is okay to move forward but Science is much more.
a/ Read the papers (not just abstracts)
b/ Put them in perspective with the full literature
Critique the ethics AND maintain scientific rigor.
#replication #cognitivedissonance #scienticrigor
a/ Read the papers (not just abstracts)
b/ Put them in perspective with the full literature
Critique the ethics AND maintain scientific rigor.
#replication #cognitivedissonance #scienticrigor
Bottom line: Yes, condemn the unethical methods. But don't dismiss cognitive dissonance theory based on one inconsistent secondary effect.
We must be serious in engaging in Science.
We must be serious in engaging in Science.
November 8, 2025 at 1:03 PM
Bottom line: Yes, condemn the unethical methods. But don't dismiss cognitive dissonance theory based on one inconsistent secondary effect.
We must be serious in engaging in Science.
We must be serious in engaging in Science.
The proselytism effect was never robust.
Hardyck & Braden (1962)—just 6 years later!—found disconfirmation and maintenance of the belief but NO proselytism. Batson (1975) confirmed: not everyone becomes a proselyte after disconfirmation.
#replication
Hardyck & Braden (1962)—just 6 years later!—found disconfirmation and maintenance of the belief but NO proselytism. Batson (1975) confirmed: not everyone becomes a proselyte after disconfirmation.
#replication
November 8, 2025 at 1:03 PM
The proselytism effect was never robust.
Hardyck & Braden (1962)—just 6 years later!—found disconfirmation and maintenance of the belief but NO proselytism. Batson (1975) confirmed: not everyone becomes a proselyte after disconfirmation.
#replication
Hardyck & Braden (1962)—just 6 years later!—found disconfirmation and maintenance of the belief but NO proselytism. Batson (1975) confirmed: not everyone becomes a proselyte after disconfirmation.
#replication
Kelly (2025) emphasizes two points: a) unethical research methods and b) lack of proselytism effects.
I completely agree the ethics were problematic—this has plagued social psychology for decades (see: Belmont Report, Milgram, Zimbardo).
#ResearchEthics #PsychologyResearch
I completely agree the ethics were problematic—this has plagued social psychology for decades (see: Belmont Report, Milgram, Zimbardo).
#ResearchEthics #PsychologyResearch
November 8, 2025 at 12:55 PM
Kelly (2025) emphasizes two points: a) unethical research methods and b) lack of proselytism effects.
I completely agree the ethics were problematic—this has plagued social psychology for decades (see: Belmont Report, Milgram, Zimbardo).
#ResearchEthics #PsychologyResearch
I completely agree the ethics were problematic—this has plagued social psychology for decades (see: Belmont Report, Milgram, Zimbardo).
#ResearchEthics #PsychologyResearch
I didn't want to get into this discussion, but after seeing strong reactions to Kelly (2025), I think it's worth helping colleagues think more critically about what the paper actually shows—and doesn't show.
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Debunking “When Prophecy Fails”
In 1954, Dorothy Martin predicted an apocalyptic flood and promised her followers rescue by flying saucers. When neither arrived, she recanted, her group dissolved, and efforts to proselytize ceased.....
onlinelibrary.wiley.com
November 8, 2025 at 12:54 PM
I didn't want to get into this discussion, but after seeing strong reactions to Kelly (2025), I think it's worth helping colleagues think more critically about what the paper actually shows—and doesn't show.
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Spoiler: not the bombshell some claim.
#SocialPsychology #CognitiveDissonance
Good to see that some people are still reading the full paper and not only the abstract. I think Science would thank you if it can. :)
November 7, 2025 at 8:10 AM
Good to see that some people are still reading the full paper and not only the abstract. I think Science would thank you if it can. :)
Excited to be in Limerick for a few days, collaborating with @paulmaher.bsky.social, and presenting a talk today on cognitive dissonance and the replication crisis! @ulpsych.bsky.social
November 3, 2025 at 11:40 AM
Excited to be in Limerick for a few days, collaborating with @paulmaher.bsky.social, and presenting a talk today on cognitive dissonance and the replication crisis! @ulpsych.bsky.social
🎉👶 Welcome to the last new born in the Open Science effort!
Replication Research is a diamond open access journal dedicated to robust, transparent and reproducible science.
#OpenScience #ScientificPublication #Replication #OpenAccess
Replication Research is a diamond open access journal dedicated to robust, transparent and reproducible science.
#OpenScience #ScientificPublication #Replication #OpenAccess
Replication Research
Replication Research is a diamond open-access and researcher-led journal that publishes reproductions, replications, and conceptual articles on repetitive research
www.uni-muenster.de
October 10, 2025 at 10:57 AM
🎉👶 Welcome to the last new born in the Open Science effort!
Replication Research is a diamond open access journal dedicated to robust, transparent and reproducible science.
#OpenScience #ScientificPublication #Replication #OpenAccess
Replication Research is a diamond open access journal dedicated to robust, transparent and reproducible science.
#OpenScience #ScientificPublication #Replication #OpenAccess
Reposted by David C. Vaidis
Was looking into what Cognitive Scientists mean by ‘domain-general’ cognition, and then hit upon this. This is definitely NOT how we use that term.
Tip: read the last sentence to understand what went wrong here.
Sigh.
Tip: read the last sentence to understand what went wrong here.
Sigh.
August 4, 2025 at 10:17 PM
Was looking into what Cognitive Scientists mean by ‘domain-general’ cognition, and then hit upon this. This is definitely NOT how we use that term.
Tip: read the last sentence to understand what went wrong here.
Sigh.
Tip: read the last sentence to understand what went wrong here.
Sigh.
Oups. 😄 It seems my close colleague forgot to cut my joke at the end of the sentence... And then not the editor, nor the people in charge of editing considered necessary to change it before publication! #SciencePublication #FunButSad #SadButTrue #FrenchAcademic
August 12, 2025 at 3:32 PM
Oups. 😄 It seems my close colleague forgot to cut my joke at the end of the sentence... And then not the editor, nor the people in charge of editing considered necessary to change it before publication! #SciencePublication #FunButSad #SadButTrue #FrenchAcademic
240,245 participants in a single study, not too bad. The effect size is modest, but ecological validity is high due to real-world implementation! #BehavioralScience #SocialPsychology #Megastudy #ClimateChange #ImplementationScience
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Redirecting
doi.org
August 10, 2025 at 9:38 AM
240,245 participants in a single study, not too bad. The effect size is modest, but ecological validity is high due to real-world implementation! #BehavioralScience #SocialPsychology #Megastudy #ClimateChange #ImplementationScience
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
The 4th Big Team Science Conference (aka #BTSCON) will be held online October 6-8. A unique opportunity to discuss, join and anticipate the future of BTS. Registration is free/'what you can' but beware submission deadline is short! (31st July). bigteamscienceconference.github.io/submissions/
#psysci
#psysci
submissions
>>> Submit your abstract here! Submissions for all session types are now open! * *Panels, hackathons, and symposia:* maximum 500 words * *Talks, lightning talks, and unconferences:* maximum 250 words ...
bigteamscienceconference.github.io
July 8, 2025 at 5:56 AM
The 4th Big Team Science Conference (aka #BTSCON) will be held online October 6-8. A unique opportunity to discuss, join and anticipate the future of BTS. Registration is free/'what you can' but beware submission deadline is short! (31st July). bigteamscienceconference.github.io/submissions/
#psysci
#psysci
Reposted by David C. Vaidis
Awarded projects will receive:
✔️ Research funding from SIPS (up to $2,000 USD)
✔️ A recommendation decision from PCI-RR.
Deadline: August 1st.
🔗 More details: buff.ly/AigqCod
✔️ Research funding from SIPS (up to $2,000 USD)
✔️ A recommendation decision from PCI-RR.
Deadline: August 1st.
🔗 More details: buff.ly/AigqCod
June 2025
The Society for the Improvement of Psychological Science (SIPS) and Peer Community In Registered Reports (PCI-RR), together invite researchers to submit empirical research projects for consideration…
improvingpsych.org
July 7, 2025 at 5:36 PM
Awarded projects will receive:
✔️ Research funding from SIPS (up to $2,000 USD)
✔️ A recommendation decision from PCI-RR.
Deadline: August 1st.
🔗 More details: buff.ly/AigqCod
✔️ Research funding from SIPS (up to $2,000 USD)
✔️ A recommendation decision from PCI-RR.
Deadline: August 1st.
🔗 More details: buff.ly/AigqCod