Gilad Feldman
@giladfeldman.bsky.social
Social psychology, judgment & decision-making/behavioral economics, agency, & action. Open/meta science. (Peer Community in) Registered Reports, mass replications, & meta-analyses.
https://mgto.org/resume-cv/
https://mgto.org/resume-cv/
[Mailing list update]
"July-September 2025: Publications, Registered Reports, talks, and research"
Read/subscribe:
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Summary:
4 publications
1 Stage 1 in-principle acceptance
2 talks
3 research summaries
"July-September 2025: Publications, Registered Reports, talks, and research"
Read/subscribe:
mailchi.mp/5293fff49dcb...
Summary:
4 publications
1 Stage 1 in-principle acceptance
2 talks
3 research summaries
September 30, 2025 at 10:10 AM
[Mailing list update]
"July-September 2025: Publications, Registered Reports, talks, and research"
Read/subscribe:
mailchi.mp/5293fff49dcb...
Summary:
4 publications
1 Stage 1 in-principle acceptance
2 talks
3 research summaries
"July-September 2025: Publications, Registered Reports, talks, and research"
Read/subscribe:
mailchi.mp/5293fff49dcb...
Summary:
4 publications
1 Stage 1 in-principle acceptance
2 talks
3 research summaries
Other amazing mass replications of studies from Mental Accounting:
osf.io/apc26_v1
This should be published and cited.
osf.io/apc26_v1
This should be published and cited.
September 29, 2025 at 12:31 PM
Other amazing mass replications of studies from Mental Accounting:
osf.io/apc26_v1
This should be published and cited.
osf.io/apc26_v1
This should be published and cited.
It's absolutely amazing the a PCIRR Stage 2 community endorsed manuscript automatically is accepted in a journal like Royal Society Open Science with no additional peer review needed.
Go PCIRR friendly journals!
rr.peercommunityin.org/about/pci_rr...
Why aren't there more journals joining?
Go PCIRR friendly journals!
rr.peercommunityin.org/about/pci_rr...
Why aren't there more journals joining?
September 29, 2025 at 12:31 PM
It's absolutely amazing the a PCIRR Stage 2 community endorsed manuscript automatically is accepted in a journal like Royal Society Open Science with no additional peer review needed.
Go PCIRR friendly journals!
rr.peercommunityin.org/about/pci_rr...
Why aren't there more journals joining?
Go PCIRR friendly journals!
rr.peercommunityin.org/about/pci_rr...
Why aren't there more journals joining?
Amazing work for a =UG= thesis by Amy.
Students can do remarkable work.
Grateful for PCIRR open positive and constructive peer review process:
doi.org/10.24072/pci...
Thank you for reviews: Barnabas Szaszi, Féidhlim McGowan, and Chris Chambers
Thank you Thaler for your work.
Students can do remarkable work.
Grateful for PCIRR open positive and constructive peer review process:
doi.org/10.24072/pci...
Thank you for reviews: Barnabas Szaszi, Féidhlim McGowan, and Chris Chambers
Thank you Thaler for your work.
September 29, 2025 at 12:31 PM
Amazing work for a =UG= thesis by Amy.
Students can do remarkable work.
Grateful for PCIRR open positive and constructive peer review process:
doi.org/10.24072/pci...
Thank you for reviews: Barnabas Szaszi, Féidhlim McGowan, and Chris Chambers
Thank you Thaler for your work.
Students can do remarkable work.
Grateful for PCIRR open positive and constructive peer review process:
doi.org/10.24072/pci...
Thank you for reviews: Barnabas Szaszi, Féidhlim McGowan, and Chris Chambers
Thank you Thaler for your work.
In prediction polls I ran on TwitterX back in 2022, 73.3% of 30 votes thought it would successfully replicate.
Poll:
x.com/giladfeldman...
See that thread to check how that compares to the other predictions.
Poll:
x.com/giladfeldman...
See that thread to check how that compares to the other predictions.
September 29, 2025 at 12:31 PM
In prediction polls I ran on TwitterX back in 2022, 73.3% of 30 votes thought it would successfully replicate.
Poll:
x.com/giladfeldman...
See that thread to check how that compares to the other predictions.
Poll:
x.com/giladfeldman...
See that thread to check how that compares to the other predictions.
There is a lot going on, so if you need a walkthrough...
AI video summary of our project:
www.dropbox.com/scl/fi/bo9vn...
AI podcast discussion in plain language:
www.dropbox.com/scl/fi/4qqeq...
AI video summary of our project:
www.dropbox.com/scl/fi/bo9vn...
AI podcast discussion in plain language:
www.dropbox.com/scl/fi/4qqeq...
September 29, 2025 at 12:31 PM
There is a lot going on, so if you need a walkthrough...
AI video summary of our project:
www.dropbox.com/scl/fi/bo9vn...
AI podcast discussion in plain language:
www.dropbox.com/scl/fi/4qqeq...
AI video summary of our project:
www.dropbox.com/scl/fi/bo9vn...
AI podcast discussion in plain language:
www.dropbox.com/scl/fi/4qqeq...
We conducted a replication & extensions of Thaler (1999), the seminal =review article = of mental accounting covering many studies in behavioral economics.
A very complex replication project.
Conclusion:
Mostly successful, support for 11 of 17 scenarios, 3 mixed, 3 no support.
A very complex replication project.
Conclusion:
Mostly successful, support for 11 of 17 scenarios, 3 mixed, 3 no support.
September 29, 2025 at 12:31 PM
We conducted a replication & extensions of Thaler (1999), the seminal =review article = of mental accounting covering many studies in behavioral economics.
A very complex replication project.
Conclusion:
Mostly successful, support for 11 of 17 scenarios, 3 mixed, 3 no support.
A very complex replication project.
Conclusion:
Mostly successful, support for 11 of 17 scenarios, 3 mixed, 3 no support.
Read:
doi.org/10.1098/rsos...
Preprint, open peer review, pre-registrations, materials, data, and code are available on the OSF (under "Files):
osf.io/v7fbj/
Abstract:
doi.org/10.1098/rsos...
Preprint, open peer review, pre-registrations, materials, data, and code are available on the OSF (under "Files):
osf.io/v7fbj/
Abstract:
September 29, 2025 at 12:31 PM
Read:
doi.org/10.1098/rsos...
Preprint, open peer review, pre-registrations, materials, data, and code are available on the OSF (under "Files):
osf.io/v7fbj/
Abstract:
doi.org/10.1098/rsos...
Preprint, open peer review, pre-registrations, materials, data, and code are available on the OSF (under "Files):
osf.io/v7fbj/
Abstract:
Our PCIRR Stage 2 Registered Report now officially accepted by Royal Society Open Science:
"Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999)"
Mengfei Li's remarkable UG RRR thesis.
Details 👇🧵
"Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999)"
Mengfei Li's remarkable UG RRR thesis.
Details 👇🧵
September 29, 2025 at 12:31 PM
Our PCIRR Stage 2 Registered Report now officially accepted by Royal Society Open Science:
"Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999)"
Mengfei Li's remarkable UG RRR thesis.
Details 👇🧵
"Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999)"
Mengfei Li's remarkable UG RRR thesis.
Details 👇🧵
Of 28, 16 (57%) successfully replicated.
Expert forecasters were overoptimistic: prediction markets expected 70%, surveys expected 65%.
Correlations between predictions & outcomes were not high (r = 0.43), & weaker for survey (r = 0.26).
AI summary:
mgto.org/forecastinga...
Expert forecasters were overoptimistic: prediction markets expected 70%, surveys expected 65%.
Correlations between predictions & outcomes were not high (r = 0.43), & weaker for survey (r = 0.26).
AI summary:
mgto.org/forecastinga...
September 10, 2025 at 1:23 PM
Of 28, 16 (57%) successfully replicated.
Expert forecasters were overoptimistic: prediction markets expected 70%, surveys expected 65%.
Correlations between predictions & outcomes were not high (r = 0.43), & weaker for survey (r = 0.26).
AI summary:
mgto.org/forecastinga...
Expert forecasters were overoptimistic: prediction markets expected 70%, surveys expected 65%.
Correlations between predictions & outcomes were not high (r = 0.43), & weaker for survey (r = 0.26).
AI summary:
mgto.org/forecastinga...
Read: www.researchgate.net/publication/...
Thanks, Anna Dreber & economist team that made this a reality, & @PRASAC for taking lead.
Main question:
Can prediction markets and surveys accurately predict if classic social psychology & JDM findings will replicate in new data collections?
Thanks, Anna Dreber & economist team that made this a reality, & @PRASAC for taking lead.
Main question:
Can prediction markets and surveys accurately predict if classic social psychology & JDM findings will replicate in new data collections?
September 10, 2025 at 1:23 PM
Read: www.researchgate.net/publication/...
Thanks, Anna Dreber & economist team that made this a reality, & @PRASAC for taking lead.
Main question:
Can prediction markets and surveys accurately predict if classic social psychology & JDM findings will replicate in new data collections?
Thanks, Anna Dreber & economist team that made this a reality, & @PRASAC for taking lead.
Main question:
Can prediction markets and surveys accurately predict if classic social psychology & JDM findings will replicate in new data collections?
Accepted for publication at Royal Society Open Science:
"Using prediction markets and forecasting surveys to predict 28 replication outcomes of classic articles in social psychology and judgment and decision making"
Going meta-science on our CORE team replications
Details👇🧵
"Using prediction markets and forecasting surveys to predict 28 replication outcomes of classic articles in social psychology and judgment and decision making"
Going meta-science on our CORE team replications
Details👇🧵
September 10, 2025 at 1:23 PM
Accepted for publication at Royal Society Open Science:
"Using prediction markets and forecasting surveys to predict 28 replication outcomes of classic articles in social psychology and judgment and decision making"
Going meta-science on our CORE team replications
Details👇🧵
"Using prediction markets and forecasting surveys to predict 28 replication outcomes of classic articles in social psychology and judgment and decision making"
Going meta-science on our CORE team replications
Details👇🧵
Now officially published online:
doi.org/10.1017/jdm....
doi.org/10.1017/jdm....
August 28, 2025 at 9:28 AM
Now officially published online:
doi.org/10.1017/jdm....
doi.org/10.1017/jdm....
For now, I'll just refer to my previous thread on TwitterX for more information about this:
x.com/giladfeldman...
x.com/giladfeldman...
August 19, 2025 at 4:53 PM
For now, I'll just refer to my previous thread on TwitterX for more information about this:
x.com/giladfeldman...
x.com/giladfeldman...
Read:
www.researchgate.net/publication/...
Thanks, Prasad, & sorry for dragging you into this.
The main issue:
Are direct replications of an article published in 1993 using the same materials they used back then worthwhile? What can we conclude if the replication fails?
www.researchgate.net/publication/...
Thanks, Prasad, & sorry for dragging you into this.
The main issue:
Are direct replications of an article published in 1993 using the same materials they used back then worthwhile? What can we conclude if the replication fails?
August 19, 2025 at 4:53 PM
Read:
www.researchgate.net/publication/...
Thanks, Prasad, & sorry for dragging you into this.
The main issue:
Are direct replications of an article published in 1993 using the same materials they used back then worthwhile? What can we conclude if the replication fails?
www.researchgate.net/publication/...
Thanks, Prasad, & sorry for dragging you into this.
The main issue:
Are direct replications of an article published in 1993 using the same materials they used back then worthwhile? What can we conclude if the replication fails?
Accepted for publication at Judgement and Decision Making:
"On process & value of direct close replications: Rejoinder to Shafir and Cheek (2024) commentary on Chandrashekar etal. (2021)"
Responding to original authors regarding our replication of Shafir (1993).
Details 👇🧵
"On process & value of direct close replications: Rejoinder to Shafir and Cheek (2024) commentary on Chandrashekar etal. (2021)"
Responding to original authors regarding our replication of Shafir (1993).
Details 👇🧵
August 19, 2025 at 4:53 PM
Accepted for publication at Judgement and Decision Making:
"On process & value of direct close replications: Rejoinder to Shafir and Cheek (2024) commentary on Chandrashekar etal. (2021)"
Responding to original authors regarding our replication of Shafir (1993).
Details 👇🧵
"On process & value of direct close replications: Rejoinder to Shafir and Cheek (2024) commentary on Chandrashekar etal. (2021)"
Responding to original authors regarding our replication of Shafir (1993).
Details 👇🧵
Been doing workshops about Peer Community In @PeerCommunityIn / PCI Registered Reports @PCI_RegReports / PCI Psychology & associated Peer Community Journal @PeerComJournal for 3 years now.
Most common concern: "PCJ has no impact factor". 🤦
PCJ now has IF 2.
A science revolution.
Most common concern: "PCJ has no impact factor". 🤦
PCJ now has IF 2.
A science revolution.
August 7, 2025 at 2:54 PM
Been doing workshops about Peer Community In @PeerCommunityIn / PCI Registered Reports @PCI_RegReports / PCI Psychology & associated Peer Community Journal @PeerComJournal for 3 years now.
Most common concern: "PCJ has no impact factor". 🤦
PCJ now has IF 2.
A science revolution.
Most common concern: "PCJ has no impact factor". 🤦
PCJ now has IF 2.
A science revolution.
[Mailing list update]
"April-June 2025: Research, publications, Registered Reports, and preprints"
Read/subscribe:
mailchi.mp/9b679effcff4...
Summary:
Left University of Hong Kong
3 publications (3 are Registered Reports)
2 Stage 1 in-principle acceptance
1 preprint
"April-June 2025: Research, publications, Registered Reports, and preprints"
Read/subscribe:
mailchi.mp/9b679effcff4...
Summary:
Left University of Hong Kong
3 publications (3 are Registered Reports)
2 Stage 1 in-principle acceptance
1 preprint
July 3, 2025 at 5:42 AM
[Mailing list update]
"April-June 2025: Research, publications, Registered Reports, and preprints"
Read/subscribe:
mailchi.mp/9b679effcff4...
Summary:
Left University of Hong Kong
3 publications (3 are Registered Reports)
2 Stage 1 in-principle acceptance
1 preprint
"April-June 2025: Research, publications, Registered Reports, and preprints"
Read/subscribe:
mailchi.mp/9b679effcff4...
Summary:
Left University of Hong Kong
3 publications (3 are Registered Reports)
2 Stage 1 in-principle acceptance
1 preprint
Now officially published:
doi.org/10.1098/rsos...
doi.org/10.1098/rsos...
May 11, 2025 at 6:31 AM
Now officially published:
doi.org/10.1098/rsos...
doi.org/10.1098/rsos...
😔😞
By experiment:
Same-sign significance (p<0.05) 9/47 (19%)
By replication:
Same-sign significance (p<0.05) 13/97 (13%)
By experiment:
Same-sign significance (p<0.05) 9/47 (19%)
By replication:
Same-sign significance (p<0.05) 13/97 (13%)
April 10, 2025 at 8:10 AM
😔😞
By experiment:
Same-sign significance (p<0.05) 9/47 (19%)
By replication:
Same-sign significance (p<0.05) 13/97 (13%)
By experiment:
Same-sign significance (p<0.05) 9/47 (19%)
By replication:
Same-sign significance (p<0.05) 13/97 (13%)
Wow.
"56 laboratories performed 143 replications of 56 experiments; 96 replications of 47 experiments were considered valid [...] Replication rates for these experiments varied between 15 & 45% according to five predefined criteria [...] effect sizes were 60% larger in original experiments"
"56 laboratories performed 143 replications of 56 experiments; 96 replications of 47 experiments were considered valid [...] Replication rates for these experiments varied between 15 & 45% according to five predefined criteria [...] effect sizes were 60% larger in original experiments"
April 10, 2025 at 8:10 AM
Wow.
"56 laboratories performed 143 replications of 56 experiments; 96 replications of 47 experiments were considered valid [...] Replication rates for these experiments varied between 15 & 45% according to five predefined criteria [...] effect sizes were 60% larger in original experiments"
"56 laboratories performed 143 replications of 56 experiments; 96 replications of 47 experiments were considered valid [...] Replication rates for these experiments varied between 15 & 45% according to five predefined criteria [...] effect sizes were 60% larger in original experiments"
Now officially online:
doi.org/10.1098/rsos...
doi.org/10.1098/rsos...
April 3, 2025 at 10:02 AM
Now officially online:
doi.org/10.1098/rsos...
doi.org/10.1098/rsos...
Now officially online:
doi.org/10.1177/0146...
doi.org/10.1177/0146...
April 2, 2025 at 12:05 PM
Now officially online:
doi.org/10.1177/0146...
doi.org/10.1177/0146...
[Mailing list update]
"January-March 2025: Research, publications, Registered Reports, preprints, courses, and talks"
Read/subscribe:
mailchi.mp/77935cf4c4a7...
Summary:
4 publications (3 are Registered Reports)
2 preprints
1 course
3 talks/workshops
"January-March 2025: Research, publications, Registered Reports, preprints, courses, and talks"
Read/subscribe:
mailchi.mp/77935cf4c4a7...
Summary:
4 publications (3 are Registered Reports)
2 preprints
1 course
3 talks/workshops
April 2, 2025 at 6:52 AM
[Mailing list update]
"January-March 2025: Research, publications, Registered Reports, preprints, courses, and talks"
Read/subscribe:
mailchi.mp/77935cf4c4a7...
Summary:
4 publications (3 are Registered Reports)
2 preprints
1 course
3 talks/workshops
"January-March 2025: Research, publications, Registered Reports, preprints, courses, and talks"
Read/subscribe:
mailchi.mp/77935cf4c4a7...
Summary:
4 publications (3 are Registered Reports)
2 preprints
1 course
3 talks/workshops
Read:
www.researchgate.net/publication/...
Main arguments:
- Replications value goes beyond replicability
- Replications are very rare: We just do not do replications
- Replication value is tied to research value, we should assess research value, and not start from replications
www.researchgate.net/publication/...
Main arguments:
- Replications value goes beyond replicability
- Replications are very rare: We just do not do replications
- Replication value is tied to research value, we should assess research value, and not start from replications
March 25, 2025 at 9:38 AM
Read:
www.researchgate.net/publication/...
Main arguments:
- Replications value goes beyond replicability
- Replications are very rare: We just do not do replications
- Replication value is tied to research value, we should assess research value, and not start from replications
www.researchgate.net/publication/...
Main arguments:
- Replications value goes beyond replicability
- Replications are very rare: We just do not do replications
- Replication value is tied to research value, we should assess research value, and not start from replications