Christina Areizaga Barbieri, Ph.D.
@cabarbieri.bsky.social
Associate Prof, U of DE | Math cognition, instruction, motivation | PI of M^3 lab | Supports for Minoritized students | Stats enthusiast | 1st Gen | Latina 🇵🇷🇮🇹 she/her
Pinned
Client Challenge
rdcu.be
New paper in *Instructional Science* led by PhD Candidate Taylor-Paige Guba w/@mandymathed.bsky.social & Anne Morris! Correct, complete exemplars support PSTs' fraction magnitude explanations. Persistent overconfidence highlights need for explicit metacognitive support in teacher ed. rdcu.be/eX7ue
New paper led by Ilyse Resnick! Informal fraction knowledge grew Gr1–2 w/little instruction; nonsymbolic>symbolic; “half” led in Gr1, 3rds/4ths in Gr2; early fractions predicted later math beyond number sense (Resnick, Viegut, Barbieri, @noranewcombe.bsky.social & Jordan) tinyurl.com/Resnicketal2...
ScienceDirect.com | Science, health and medical journals, full text articles and books.
authors.elsevier.com
January 20, 2026 at 6:31 PM
New paper led by Ilyse Resnick! Informal fraction knowledge grew Gr1–2 w/little instruction; nonsymbolic>symbolic; “half” led in Gr1, 3rds/4ths in Gr2; early fractions predicted later math beyond number sense (Resnick, Viegut, Barbieri, @noranewcombe.bsky.social & Jordan) tinyurl.com/Resnicketal2...
New paper in *Instructional Science* led by PhD Candidate Taylor-Paige Guba w/@mandymathed.bsky.social & Anne Morris! Correct, complete exemplars support PSTs' fraction magnitude explanations. Persistent overconfidence highlights need for explicit metacognitive support in teacher ed. rdcu.be/eX7ue
Client Challenge
rdcu.be
January 9, 2026 at 4:03 PM
New paper in *Instructional Science* led by PhD Candidate Taylor-Paige Guba w/@mandymathed.bsky.social & Anne Morris! Correct, complete exemplars support PSTs' fraction magnitude explanations. Persistent overconfidence highlights need for explicit metacognitive support in teacher ed. rdcu.be/eX7ue
Reposted by Christina Areizaga Barbieri, Ph.D.
I’m so close to 1k! Hurry find 5 more real people and make them follow me.
January 8, 2026 at 8:46 PM
I’m so close to 1k! Hurry find 5 more real people and make them follow me.
Thanks for leading this work @elenamsilla.bsky.social ! Always a pleasure to work and write with Elena!
Excited to share a new paper from UD's Early Fraction Understanding Project! We identified three latent profiles of informal fraction knowledge in first grade, each with relative strengths in their understanding of fraction concepts. Profile membership predicted cognitive skills and math knowledge.
Share link to new article from our early fraction understanding project--
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
January 7, 2026 at 4:57 PM
Thanks for leading this work @elenamsilla.bsky.social ! Always a pleasure to work and write with Elena!
As Dr. Chawla explains, the 0–100 number line estimation task is widely used to study children’s numerical magnitude understanding. Along w/Dr. @juliebooth.bsky.social we asked a practical measurement question: What is the optimal number of items needed to retain the task’s utility? See new 📄 in JNC
🚨NEW PAPER🚨
How many items do we need for the 0–100 number line?
Using IRT (GRM) on N=234, we cut 23→15 items—same developmental patterns + predictive power (K–3) while saving time, also capturing accuracy + linearity w/ @juliebooth.bsky.social @cabarbieri.bsky.social 🔢📏 doi.org/10.23668/psy...
How many items do we need for the 0–100 number line?
Using IRT (GRM) on N=234, we cut 23→15 items—same developmental patterns + predictive power (K–3) while saving time, also capturing accuracy + linearity w/ @juliebooth.bsky.social @cabarbieri.bsky.social 🔢📏 doi.org/10.23668/psy...
Optimizing the 0-100 Number Line Estimation Task: Scale Reduction and Its Implications for Elementary Mathematical Cognition [Author Accepted Manuscript] | PsychArchives
PsychArchives is a disciplinary repository for psychological science and neighboring disciplines.
doi.org
January 5, 2026 at 7:09 PM
As Dr. Chawla explains, the 0–100 number line estimation task is widely used to study children’s numerical magnitude understanding. Along w/Dr. @juliebooth.bsky.social we asked a practical measurement question: What is the optimal number of items needed to retain the task’s utility? See new 📄 in JNC
Reposted by Christina Areizaga Barbieri, Ph.D.
Student Spotlight: After finding a “home” in our #schoolpsychology program, grad student Lauren Dombrowski shares their commitment to supporting #LGBTQ+ youth in Delaware schools, drawing on personal experience and strengths of @udelaware.bsky.social’s program: www.cehd.udel.edu/graduate-stu...
Making an impact in the lives of LGBTQ+ students - College of Education & Human Development
University of Delaware graduate student supports LGBTQ+ youth, drawing on personal experience and strengths of UD’s program.
www.cehd.udel.edu
October 31, 2025 at 7:01 PM
Student Spotlight: After finding a “home” in our #schoolpsychology program, grad student Lauren Dombrowski shares their commitment to supporting #LGBTQ+ youth in Delaware schools, drawing on personal experience and strengths of @udelaware.bsky.social’s program: www.cehd.udel.edu/graduate-stu...
This is my amazing Doctoral advisee’s dissertation. She is a prior teacher and we would love if folks in the Mid-Atlantic region would repost!
Education colleagues: I am partnering with middle- and high-school math teachers in DE, PA, and MD to look at how belonging-supportive instruction shapes students' math experiences (see infographic). Teachers can participate in 2025 or early 2026. Please share w/ teachers who may be interested!
November 14, 2025 at 8:31 PM
This is my amazing Doctoral advisee’s dissertation. She is a prior teacher and we would love if folks in the Mid-Atlantic region would repost!
One week left to apply to the University of Delaware’s PhD in Education (Learning Sciences, Literacy, Math Ed, Sociocultural Approaches, School Psych) or Educational Statistics and Research Methods!
Apply to UD School of Education's Ph.D. in Education or Educational Statistics and Research Methods (ESRM) Programs by Nov. 15!
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
Ph.D. in Education - School of Education
Ph.D. in Education The Ph.D. in Education program in the School of Education seeks to prepare scholars whose research will address critical problems in education, develop our understanding of teaching...
www.education.udel.edu
November 8, 2025 at 9:26 PM
One week left to apply to the University of Delaware’s PhD in Education (Learning Sciences, Literacy, Math Ed, Sociocultural Approaches, School Psych) or Educational Statistics and Research Methods!
A parent’s worst nightmare.
November 7, 2025 at 5:00 PM
A parent’s worst nightmare.
Interested in a PhD in one of our specialization areas or programs from University of Delaware? Join me at our virtual open house tomorrow - Tues., Nov. 4 from 6-7:30 PM. Register here to get the link! grad-admissions.udel.edu/register/?id...
November 4, 2025 at 5:30 AM
Interested in a PhD in one of our specialization areas or programs from University of Delaware? Join me at our virtual open house tomorrow - Tues., Nov. 4 from 6-7:30 PM. Register here to get the link! grad-admissions.udel.edu/register/?id...
This was such a fun experience with @rodriguesjm.bsky.social Thanks for highlighting our work @jeffgreene.bsky.social !
There's been great research on supporting students w/mathematics difficulties. Would that research be even better if we integrated ideas from cognitive load theory? Yes! Learn all about it on this episode of the Div15 podcast with Drs. Barbieri & Rodrigues! #PsychSciSky #AcademicSky #EduSky
Christina Barbieri & Jessica Rodrigues
Dr. Christina Barbieri and Dr. Jessica Rodrigues join podcast host Dr. Jeff Greene to discuss their Educational Psychologist article, “Leveraging cognitive load theory to support students with mathema
soundcloud.com
October 31, 2025 at 2:39 PM
This was such a fun experience with @rodriguesjm.bsky.social Thanks for highlighting our work @jeffgreene.bsky.social !
Reposted by Christina Areizaga Barbieri, Ph.D.
An ed psych journal is refusing to publish our manuscript unless we "neutralize" "political" content. This is after the manuscript was peer-reviewed and accepted for publication. DM me for details!
I'm devastated. Two years of work and revisions with four junior co-authors cast aside that easily.
I'm devastated. Two years of work and revisions with four junior co-authors cast aside that easily.
October 14, 2025 at 12:47 PM
An ed psych journal is refusing to publish our manuscript unless we "neutralize" "political" content. This is after the manuscript was peer-reviewed and accepted for publication. DM me for details!
I'm devastated. Two years of work and revisions with four junior co-authors cast aside that easily.
I'm devastated. Two years of work and revisions with four junior co-authors cast aside that easily.
Reposted by Christina Areizaga Barbieri, Ph.D.
Open-access publication alert!! This is a special one; it represents two years of work with an amazing team of researchers, teachers, educational stakeholders, and technology experts to identify infrastructure that would advance equity in STEM education: link.springer.com/article/10.1...
A field-initiated vision of research infrastructure for STEM education - International Journal of STEM Education
STEM education research has historically been under-equipped, relying on standardized tests and questionnaires while other fields deploy space telescopes and particle accelerators. What would happen i...
link.springer.com
October 24, 2025 at 4:39 PM
Open-access publication alert!! This is a special one; it represents two years of work with an amazing team of researchers, teachers, educational stakeholders, and technology experts to identify infrastructure that would advance equity in STEM education: link.springer.com/article/10.1...
Apply to UD School of Education's Ph.D. in Education or Educational Statistics and Research Methods (ESRM) Programs by Nov. 15!
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
Ph.D. in Education - School of Education
Ph.D. in Education The Ph.D. in Education program in the School of Education seeks to prepare scholars whose research will address critical problems in education, develop our understanding of teaching...
www.education.udel.edu
October 22, 2025 at 2:07 PM
Apply to UD School of Education's Ph.D. in Education or Educational Statistics and Research Methods (ESRM) Programs by Nov. 15!
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
SOE Specializations include Literacy, Learning Sciences, Math Ed, School Psych, and Sociocultural & Community-based Approaches! www.education.udel.edu/doctoral/phd/
Reposted by Christina Areizaga Barbieri, Ph.D.
Excited to share our new paper in Psychological Methods: “Machine Learning for Propensity Score Estimation: A Systematic Review and Reporting Guidelines.” Led by Prof. Walter Leite (UF) with 6 co-authors across 6 universities. DOI: doi.org/10.1037/met0...
#CausalML #PropensityScore
#CausalML #PropensityScore
APA PsycNet
doi.org
October 20, 2025 at 4:18 PM
Excited to share our new paper in Psychological Methods: “Machine Learning for Propensity Score Estimation: A Systematic Review and Reporting Guidelines.” Led by Prof. Walter Leite (UF) with 6 co-authors across 6 universities. DOI: doi.org/10.1037/met0...
#CausalML #PropensityScore
#CausalML #PropensityScore
Reposted by Christina Areizaga Barbieri, Ph.D.
🚨 THIS FRIDAY: Spilling the Tea on the Liberal Arts Job Market ☕
Friday, Oct 24 | 2:30-4:30 PM ET | Virtual & Free
Hosted by Women in Cognitive Science+ (WiCS+)
Register: forms.gle/2ciSJXXuL2yE...
#AcademicJobs #AcademicBluesky #HigherEd #LiberalArts #CogSci #GradSchool #WomenInSTEM #PostDoc
Friday, Oct 24 | 2:30-4:30 PM ET | Virtual & Free
Hosted by Women in Cognitive Science+ (WiCS+)
Register: forms.gle/2ciSJXXuL2yE...
#AcademicJobs #AcademicBluesky #HigherEd #LiberalArts #CogSci #GradSchool #WomenInSTEM #PostDoc
October 21, 2025 at 1:44 AM
🚨 THIS FRIDAY: Spilling the Tea on the Liberal Arts Job Market ☕
Friday, Oct 24 | 2:30-4:30 PM ET | Virtual & Free
Hosted by Women in Cognitive Science+ (WiCS+)
Register: forms.gle/2ciSJXXuL2yE...
#AcademicJobs #AcademicBluesky #HigherEd #LiberalArts #CogSci #GradSchool #WomenInSTEM #PostDoc
Friday, Oct 24 | 2:30-4:30 PM ET | Virtual & Free
Hosted by Women in Cognitive Science+ (WiCS+)
Register: forms.gle/2ciSJXXuL2yE...
#AcademicJobs #AcademicBluesky #HigherEd #LiberalArts #CogSci #GradSchool #WomenInSTEM #PostDoc
Reposted by Christina Areizaga Barbieri, Ph.D.
RFK Jr on Tylenol and autism: "It is not proof. We're doing the studies to make the proof."
October 9, 2025 at 4:57 PM
RFK Jr on Tylenol and autism: "It is not proof. We're doing the studies to make the proof."
Reposted by Christina Areizaga Barbieri, Ph.D.
We’re hiring! Come work with us in the Department of Special Education at UT Austin. Scholar in special education or related fields, without restrictions on rank or specific research program. Apply here:
faculty.utexas.edu/career/168004 #WhatStartsHere
faculty.utexas.edu/career/168004 #WhatStartsHere
September 4, 2025 at 9:36 PM
We’re hiring! Come work with us in the Department of Special Education at UT Austin. Scholar in special education or related fields, without restrictions on rank or specific research program. Apply here:
faculty.utexas.edu/career/168004 #WhatStartsHere
faculty.utexas.edu/career/168004 #WhatStartsHere
Reposted by Christina Areizaga Barbieri, Ph.D.
My undergraduates (middle school math methods) would like advice and insights for teachers' interactions with parents. Teachers or teacher educators, what advice or ideas would you give to these future teachers?
October 8, 2025 at 6:43 PM
My undergraduates (middle school math methods) would like advice and insights for teachers' interactions with parents. Teachers or teacher educators, what advice or ideas would you give to these future teachers?
Oct = SREE PMENA & NCTM! @elenamsilla.bsky.social
presents lab work @ PMENA in collab w/@damcotto.bsky.social. @meg-botello.bsky.social
presents work w/@drteyar.bsky.social,
@mandymathed.bsky.social & Dr. Jordan at NCTM. Lab Alum Dr. @kamalc31.bsky.social presents his UMaine work @ SREE tomorrow!
presents lab work @ PMENA in collab w/@damcotto.bsky.social. @meg-botello.bsky.social
presents work w/@drteyar.bsky.social,
@mandymathed.bsky.social & Dr. Jordan at NCTM. Lab Alum Dr. @kamalc31.bsky.social presents his UMaine work @ SREE tomorrow!
October 10, 2025 at 2:41 AM
Oct = SREE PMENA & NCTM! @elenamsilla.bsky.social
presents lab work @ PMENA in collab w/@damcotto.bsky.social. @meg-botello.bsky.social
presents work w/@drteyar.bsky.social,
@mandymathed.bsky.social & Dr. Jordan at NCTM. Lab Alum Dr. @kamalc31.bsky.social presents his UMaine work @ SREE tomorrow!
presents lab work @ PMENA in collab w/@damcotto.bsky.social. @meg-botello.bsky.social
presents work w/@drteyar.bsky.social,
@mandymathed.bsky.social & Dr. Jordan at NCTM. Lab Alum Dr. @kamalc31.bsky.social presents his UMaine work @ SREE tomorrow!
Reposted by Christina Areizaga Barbieri, Ph.D.
🚨 TODAY!! 🚨 Join us to learn about using Sharing Circles at 2pm ET. Hope to see you there!
Join us on Friday, 6/20 at 2pm EST for the APA Div 15's Anti-Racist & Anti-Colonial Research Methods series! Our final event will focus on using Sharing Circles (a method rooted in traditional practices of many Indigenous communities) w/ Macy Bowman 🤩
Register ➡️: tiny.utk.edu/APADiv15SharingCircles
Register ➡️: tiny.utk.edu/APADiv15SharingCircles
June 20, 2025 at 2:10 PM
🚨 TODAY!! 🚨 Join us to learn about using Sharing Circles at 2pm ET. Hope to see you there!
Reposted by Christina Areizaga Barbieri, Ph.D.
"We celebrate our history, and we celebrate our contributions to this country. We don’t have to have a proclamation from anyone else but ourselves." My Juneteenth Amendment column on resistance and radical imagination in the age of erasure w/@kayewhitehead: 19thnews.org/2025/06/june...
‘We don't wait to be celebrated’: What Juneteenth means this year
Thursday marks the first national observance under President Donald Trump of Juneteenth, the day commemorating the end of slavery in the United States.
19thnews.org
June 19, 2025 at 1:24 PM
"We celebrate our history, and we celebrate our contributions to this country. We don’t have to have a proclamation from anyone else but ourselves." My Juneteenth Amendment column on resistance and radical imagination in the age of erasure w/@kayewhitehead: 19thnews.org/2025/06/june...
Also…block him. ✌️😮💨
June 19, 2025 at 2:36 AM
Also…block him. ✌️😮💨
Reposted by Christina Areizaga Barbieri, Ph.D.
I'm an Associate Editor at Current Directions in Psychological Science and I have a new Special Issue call on Intergroup Allyship. Proposal submissions are due by July 18. Please share widely!
www.psychologicalscience.org/publications...
www.psychologicalscience.org/publications...
Call for Manuscript Proposals: Special Issue on Intergroup Allyship
Current Directions in Psychological ScienceEditor: Dr. Sylvia PerryIntergroup allyship–referring to actions taken to support, advocate for, or stand in solidarity with members of marginalized groups b...
www.psychologicalscience.org
June 18, 2025 at 11:38 PM
I'm an Associate Editor at Current Directions in Psychological Science and I have a new Special Issue call on Intergroup Allyship. Proposal submissions are due by July 18. Please share widely!
www.psychologicalscience.org/publications...
www.psychologicalscience.org/publications...
Great time today giving a workshop on working w/worked examples in enVision math to DE math teachers & specialists for the School Success Center at @udelaware.bsky.social. Enjoyed developing the session w/PhD candidates @elenamsilla.bsky.social @meg-botello.bsky.social & Dr. @sarcler.bsky.social
June 19, 2025 at 2:29 AM
Great time today giving a workshop on working w/worked examples in enVision math to DE math teachers & specialists for the School Success Center at @udelaware.bsky.social. Enjoyed developing the session w/PhD candidates @elenamsilla.bsky.social @meg-botello.bsky.social & Dr. @sarcler.bsky.social