An enormous study of 650 babies refutes a classic 1999 finding about rule-learning in infants onlinelibrary.wiley.com/doi/10.1111/...
This is the ManyBabies3 study; read about ManyBabies, ManyDogs, and many other multi-lab replication studies in our feature www.nature.com/articles/d41...
This is the ManyBabies3 study; read about ManyBabies, ManyDogs, and many other multi-lab replication studies in our feature www.nature.com/articles/d41...
ManyBabies 3: A Multi‐Lab Study of Infant Algebraic Rule Learning
The ability to learn and apply rules lies at the heart of cognition. In a seminal study, Marcus et al. (1999) reported that 7-month-old infants learned abstract rules over syllable sequences and were...
onlinelibrary.wiley.com
September 30, 2026 at 11:35 AM
An enormous study of 650 babies refutes a classic 1999 finding about rule-learning in infants onlinelibrary.wiley.com/doi/10.1111/...
This is the ManyBabies3 study; read about ManyBabies, ManyDogs, and many other multi-lab replication studies in our feature www.nature.com/articles/d41...
This is the ManyBabies3 study; read about ManyBabies, ManyDogs, and many other multi-lab replication studies in our feature www.nature.com/articles/d41...
ManyBabies folks will be interested in many of the sessions at this year’s BTSCON, including a panel about what we’ve learned from the first 10 years of MB. Check out the program and register now! All fees are optional, but MB gets a share of the proceeds ☺️
bigteamscienceconference.github.io
bigteamscienceconference.github.io
September 29, 2026 at 3:09 PM
ManyBabies folks will be interested in many of the sessions at this year’s BTSCON, including a panel about what we’ve learned from the first 10 years of MB. Check out the program and register now! All fees are optional, but MB gets a share of the proceeds ☺️
bigteamscienceconference.github.io
bigteamscienceconference.github.io
Well, that's a bit of a gut punch... onlinelibrary.wiley.com/doi/epdf/10....
ManyBabies 3: A Multi‐Lab Study of Infant Algebraic Rule Learning
Reader environment loaded
onlinelibrary.wiley.com
September 29, 2026 at 7:34 AM
Well, that's a bit of a gut punch... onlinelibrary.wiley.com/doi/epdf/10....
Meta-analytic plot below: only 1 out of the 31 samples find evidence of the effect. Huge effort from the entire ManyBabies 3 team led by @ingmarvisser.bsky.social. Imo an important moment for reflection in infant research (esp. language development) given the centrality of this finding. 2/2
September 28, 2026 at 4:02 PM
Meta-analytic plot below: only 1 out of the 31 samples find evidence of the effect. Huge effort from the entire ManyBabies 3 team led by @ingmarvisser.bsky.social. Imo an important moment for reflection in infant research (esp. language development) given the centrality of this finding. 2/2
This was a fantastic team effort across 30+ labs 🌍 Paper (open access), data & code all public. > 📄 doi.org/10.1111/desc... > 💻 github.com/manybabies/m... > #ManyBabies #InfantCognition #OpenScience #DevSci, lead team: Andreea Geambaşu, Melanie Soderstrom, and Claartje Levelt
ManyBabies 3: A Multi‐Lab Study of Infant Algebraic Rule Learning
The ability to learn and apply rules lies at the heart of cognition. In a seminal study, Marcus et al. (1999) reported that 7-month-old infants learned abstract rules over syllable sequences and were...
doi.org
September 28, 2026 at 11:36 AM
This was a fantastic team effort across 30+ labs 🌍 Paper (open access), data & code all public. > 📄 doi.org/10.1111/desc... > 💻 github.com/manybabies/m... > #ManyBabies #InfantCognition #OpenScience #DevSci, lead team: Andreea Geambaşu, Melanie Soderstrom, and Claartje Levelt
ManyBabies 3 is a large, cross-linguistic conceptual replication: 650 analysed infants, ages 5–12 months, 33 primary languages, mono- & multilingual, across 3 paradigms (headturn, central fixation, eye-tracking). Stimuli phonologically balanced across languages. 3/
September 28, 2026 at 11:34 AM
ManyBabies 3 is a large, cross-linguistic conceptual replication: 650 analysed infants, ages 5–12 months, 33 primary languages, mono- & multilingual, across 3 paradigms (headturn, central fixation, eye-tracking). Stimuli phonologically balanced across languages. 3/
New paper 🍼📄 ManyBabies 3 is out (open access, registered report in Developmental Science). 30 labs, 33 languages, 839 infants set out to replicate a textbook finding: 7-month-olds learn abstract rules from speech (@garymarcus.bsky.social et al., 1999). We didn’t find it. 🧵
September 28, 2026 at 11:33 AM
New paper 🍼📄 ManyBabies 3 is out (open access, registered report in Developmental Science). 30 labs, 33 languages, 839 infants set out to replicate a textbook finding: 7-month-olds learn abstract rules from speech (@garymarcus.bsky.social et al., 1999). We didn’t find it. 🧵
Wie lernen Babys Regeln?
Dieser Frage ging das internationale Forschungsprojekt ManyBabies 3 nach. Durch die Zusammenarbeit von 30 Forschungslaboren aus verschiedenen Ländern konnten Babys aus unterschiedlichen Teilen der Welt berücksichtigt werden.
Dieser Frage ging das internationale Forschungsprojekt ManyBabies 3 nach. Durch die Zusammenarbeit von 30 Forschungslaboren aus verschiedenen Ländern konnten Babys aus unterschiedlichen Teilen der Welt berücksichtigt werden.
September 24, 2026 at 2:23 PM
Wie lernen Babys Regeln?
Dieser Frage ging das internationale Forschungsprojekt ManyBabies 3 nach. Durch die Zusammenarbeit von 30 Forschungslaboren aus verschiedenen Ländern konnten Babys aus unterschiedlichen Teilen der Welt berücksichtigt werden.
Dieser Frage ging das internationale Forschungsprojekt ManyBabies 3 nach. Durch die Zusammenarbeit von 30 Forschungslaboren aus verschiedenen Ländern konnten Babys aus unterschiedlichen Teilen der Welt berücksichtigt werden.
The new ManyBabies paper would seem to be something of a big deal: onlinelibrary.wiley.com/doi/10.1111/...
ManyBabies 3: A Multi‐Lab Study of Infant Algebraic Rule Learning
The ability to learn and apply rules lies at the heart of cognition. In a seminal study, Marcus et al. (1999) reported that 7-month-old infants learned abstract rules over syllable sequences and were...
onlinelibrary.wiley.com
September 17, 2026 at 1:22 PM
The new ManyBabies paper would seem to be something of a big deal: onlinelibrary.wiley.com/doi/10.1111/...
Launched during a fabulous #ICIS2026, ManyBabies9 is rolling out! Our MB9 will investigate face perceptual specialization. We are looking for individuals and lab groups to contribute. Check out this form for details: forms.gle/JdbgZsJavE8v...
ManyBabies 9: Perceptual Specialization Project Involvement Interest Form
Perceptual specialization is the process by which an individual builds expertise for differentiating among stimuli most familiar to them and demonstrates reduced capability for differentiating stimuli...
forms.gle
July 13, 2026 at 4:36 PM
Launched during a fabulous #ICIS2026, ManyBabies9 is rolling out! Our MB9 will investigate face perceptual specialization. We are looking for individuals and lab groups to contribute. Check out this form for details: forms.gle/JdbgZsJavE8v...
#ICIS2026
Raji Madhavan presenting MB-AtHome: Looking-While-Listening (MBAH1-LWL) 👶🏠
👏🥰
Join an info session next week to learn more! Info at:
manybabies.org/MBAH1/
Raji Madhavan presenting MB-AtHome: Looking-While-Listening (MBAH1-LWL) 👶🏠
👏🥰
Join an info session next week to learn more! Info at:
manybabies.org/MBAH1/
July 9, 2026 at 7:55 PM
#ICIS2026
Raji Madhavan presenting MB-AtHome: Looking-While-Listening (MBAH1-LWL) 👶🏠
👏🥰
Join an info session next week to learn more! Info at:
manybabies.org/MBAH1/
Raji Madhavan presenting MB-AtHome: Looking-While-Listening (MBAH1-LWL) 👶🏠
👏🥰
Join an info session next week to learn more! Info at:
manybabies.org/MBAH1/
What 5000 babies can tell us about developing minds and how to study them doi.org/10.1038/s442...
Commun Psychol 2026
Commun Psychol 2026
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
July 1, 2026 at 2:33 AM
What 5000 babies can tell us about developing minds and how to study them doi.org/10.1038/s442...
Commun Psychol 2026
Commun Psychol 2026
New Comment in the journal: What 5000 babies can tell us about developing minds and how to study them
www.nature.com/articles/s44...
www.nature.com/articles/s44...
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
www.nature.com
June 11, 2026 at 8:15 AM
New Comment in the journal: What 5000 babies can tell us about developing minds and how to study them
www.nature.com/articles/s44...
www.nature.com/articles/s44...
What 5000 babies can tell us about developing minds and how to study them. New paper by Brianna T. M. McMillan & al. with @chbergma.bsky.social
doi.org/10.1038/s44271-026-00477-w
doi.org/10.1038/s44271-026-00477-w
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
June 11, 2026 at 7:35 AM
What 5000 babies can tell us about developing minds and how to study them. New paper by Brianna T. M. McMillan & al. with @chbergma.bsky.social
doi.org/10.1038/s44271-026-00477-w
doi.org/10.1038/s44271-026-00477-w
New mini perspective zooming out on some takeaways from the first four ManyBabies projects!
New ManyBabies publication!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
June 10, 2026 at 11:30 PM
New mini perspective zooming out on some takeaways from the first four ManyBabies projects!
And of course a HUGE thank you to the hundreds of researchers who have contributed to ManyBabies and to the thousands of babies (and their families) who have made this work possible!
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
June 10, 2026 at 9:47 PM
And of course a HUGE thank you to the hundreds of researchers who have contributed to ManyBabies and to the thousands of babies (and their families) who have made this work possible!
So excited to see this cool summary of our progress to date! Go ManyBabies!!!
New ManyBabies publication!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
June 10, 2026 at 9:00 PM
So excited to see this cool summary of our progress to date! Go ManyBabies!!!
New ManyBabies publication!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
What 5000 babies can tell us about developing minds and how to study them - Communications Psychology
A decade of ManyBabies research, testing thousands of babies across hundreds of labs, has shown that some, but not all findings in infant research replicate well. Collectively, these projects have sho...
doi.org
June 10, 2026 at 8:55 PM
New ManyBabies publication!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
Over 10+ years and 5,000+ babies tested, we've learned a ton about how to study the developing mind. In this comment, we discuss three such lessons that are shaping the future of ManyBabies. We'd love to hear your thoughts!
ManyBabies
ManyBirds
ManyDogs
It sounds like scientists are assembling an army of cuteness.
ManyBirds
ManyDogs
It sounds like scientists are assembling an army of cuteness.
June 4, 2026 at 3:04 PM
ManyBabies
ManyBirds
ManyDogs
It sounds like scientists are assembling an army of cuteness.
ManyBirds
ManyDogs
It sounds like scientists are assembling an army of cuteness.
And @k2mey.bsky.social, if you ever fancy leading a ManyBabies project then count me in, I'm sure we could do something very cool together :) maybe even ManyBabies/ManyRobots....?
April 29, 2026 at 11:54 AM
And @k2mey.bsky.social, if you ever fancy leading a ManyBabies project then count me in, I'm sure we could do something very cool together :) maybe even ManyBabies/ManyRobots....?
Big Team Science projects like ManyBabies work best if many people contribute, you can get involved here: manybabies.org/get_involved/ or reach out to @hbaum.bsky.social
Get Involved!
General Contact Info Contact info: Governing Board, Executive Director (more info available here) General MB Listserv: Subscribe General MB Slack: Join workspace *** In addition to collecting data, th...
manybabies.org
March 5, 2026 at 2:30 PM
Big Team Science projects like ManyBabies work best if many people contribute, you can get involved here: manybabies.org/get_involved/ or reach out to @hbaum.bsky.social
For example, for ManyBabies 1 ("Do babies prefer infant-directed speech vs. adult-directed speech?"), they tested >2K babies with 149 authors from 16 countries. The hypothesis could be confirmed - but there was also a methods effect and lots of variability through age and language.
March 5, 2026 at 1:48 PM
For example, for ManyBabies 1 ("Do babies prefer infant-directed speech vs. adult-directed speech?"), they tested >2K babies with 149 authors from 16 countries. The hypothesis could be confirmed - but there was also a methods effect and lots of variability through age and language.
Hier ist ein Link zur Studie, die letztes Jahr erschien: onlinelibrary.wiley.com/doi/abs/10.1... Nicht nur ManyBabies, sondern ManyCo-authors - in dem geteilten Dokument ging es beim Schreiben des Manuskripts hoch her! ;)
Infants’ Social Evaluation of Helpers and Hinderers: A Large‐Scale, Multi‐Lab, Coordinated Replication Study
Evaluating whether someone's behavior is praiseworthy or blameworthy is a fundamental human trait. A seminal study by Hamlin and colleagues in 2007 suggested that the ability to form social evaluatio...
onlinelibrary.wiley.com
December 10, 2025 at 7:28 PM
Hier ist ein Link zur Studie, die letztes Jahr erschien: onlinelibrary.wiley.com/doi/abs/10.1... Nicht nur ManyBabies, sondern ManyCo-authors - in dem geteilten Dokument ging es beim Schreiben des Manuskripts hoch her! ;)
We're so excited to announce that our first official CONNECT preprint is now available:
"A network of networks: The next frontier for Big Team Science"
🔗 doi.org/10.31234/osf...
Please read, share, and give us feedback!
✉️ connect-contact[at]manybabies[dot]org
"A network of networks: The next frontier for Big Team Science"
🔗 doi.org/10.31234/osf...
Please read, share, and give us feedback!
✉️ connect-contact[at]manybabies[dot]org
OSF
doi.org
November 11, 2025 at 7:09 PM
We're so excited to announce that our first official CONNECT preprint is now available:
"A network of networks: The next frontier for Big Team Science"
🔗 doi.org/10.31234/osf...
Please read, share, and give us feedback!
✉️ connect-contact[at]manybabies[dot]org
"A network of networks: The next frontier for Big Team Science"
🔗 doi.org/10.31234/osf...
Please read, share, and give us feedback!
✉️ connect-contact[at]manybabies[dot]org
Top tier journals often require within manuscript replication (e.g., Dev Psych). Then there is the ManyBabies project from focusing on well powered replication studies. Finally, the Open Science Framework making data available for replication. Talk to your mentor and good luck with your research!
October 18, 2025 at 8:55 PM
Top tier journals often require within manuscript replication (e.g., Dev Psych). Then there is the ManyBabies project from focusing on well powered replication studies. Finally, the Open Science Framework making data available for replication. Talk to your mentor and good luck with your research!