Lisa Feigenson, Ph.D.

What is the format of the mental representations that store information, and what computations can we perform over these representations? Our research explores answers to these questions for the case of the concept “individual”. This work both draws from and unites research in numerical cognition, object-based attention, and short-term memory. Our research centers on infants and young children. By examining key points in development we can gain insight into the role played by a set of representations as new knowledge is acquired, and as new knowledge structures are created.

Curriculum Vitae:

Justin Halberda, Ph.D.

Professor Halberda's research focuses on two main topics. The first is an interest in language acquisition and the possibility that logical deductive inference may play a role in the learning of new words. The second is an interest in the organization of attention and the connection of mind to world. Students in the lab work with infants, children and adults using classic anticipatory-looking paradigms and eye-tracking as well as computational modeling.

Curriculum Vitae:




Alex Silver -
Lab Coordinator

I received a B.A. in Psychological and Brain Sciences from Johns Hopkins, where I worked as an undergraduate Research Assistant and then Project Coordinator in the Lab for Child Development. After some time away working in other labs, I am so excited to return as the lab manager! I am interested in the influence of social factors on children's attitudes, anxiety and performance in math and other related fields, and I can't wait to delve further into these questions in the Lab!



post doc

Andrea Quintero -
Post-Doctoral Fellow

Project Website:

I received my Ph.D. in Neuroscience from the University of California, Davis in 2014 where I studied children, in particular girls, with genetic syndromes that confer elevated risk for psychiatric disorders and cognitive impairment. I am interested in how genetics and environment interact to influence cognitive development and how scientific research can positively impact children's math performance.




Jenny Wang -
6th year graduate student

Personal Website

I'm interested in how the primary cognitive systems that we are born with and are shared among different species enable us to acquire the complicated symbolic knowledge that no other animals enjoy. My approach to this question is to ask two more specific questions: What role does our intuitive sense of number play in our symbolic mathematics? How does the developing concept of object interact with acquisition of corresponding language expressions?



Rita Loiotile -
6th year graduate student






Jasmin Perez -
2nd year graduate student

I am interested in the kinds of early hypotheses infants form about an object's behavior within and outside of a prescribed spatial context. Moreover, I’d like to learn how these early hypotheses change throughout development to allow children and adults to form accurate and flexible representations of more complex object interactions.








Dikachi Osaji - Senior
I am a Senior Psychology and Public Health double major on a pre-medical track with a Theater Arts and Studies minor. I love playing and working with children and I'm thrilled to pursue my interest in the development of children's memory abilities. I am proud to be part of this group of motivated researchers and look forward to expanding my knowledge of childhood development through research.


Maria Chroneos - Senior
I am a Senior Cognitive Science major and French minor, and am so excited to be joining the LCD for my fourth semester! In the lab I am interested in understanding more about child language acquisition cognition, but am more generally interested in neurodevelopmental disorders and their cognitive consequences. I have always loved working with kids and after graduating, I hope to pursure an MD/PhD and spend my career treating kids and studying development!


Ally Rogers - Senior
I am a Senior at Johns Hopkins double majoring in Public Health and Psychology. I'm very excited to join the lab and investigate the ways infants and children process information and understand the world around them. I am especially interested to learn about how children's experiences with their environments affect their behaviors and developmental pathways.


Abby Berk - Junior
I am a Psychology major and Business minor, and I am so excited to be a part of Hopkins' Lab for Child Development. After spending many summers as a camp counselor, I am looking forward to learning about children from an academic perspective. I am intrigued by what motivates children to do what they do, and want to learn about how they make sense of the active world around them.


Kate Carosella - Junior
I am a Neuroscience and Psychology major who is very interested in neurodevelopmental disorders, particularly in children. I am so excited to get to learn more about what children are capable of and how they view themselves. Working in the Lab for Child Development will not only teach me a lot about children, but also about research procedures!


Amos Jeng - Junior
I am a Junior at Johns Hopkins University majoring in Cognitive Science with focuses in cognitive psychology/neuropsychology and linguistics. I love working with children, and through my time with the Lab for Child Development, I hope to learn more about the ins and outs of the research process along with some of the real-world applications of my major that can only be experienced outside of the classroom.


Anthony Davidson - Junior
I am a Junior Neuroscience major and Psychology minor on the pre-med track, as well as a member of the Johns Hopkins football program. Children represent an incredible opportunity to learn about the origins of the human mind, and I am thrilled to be involved in such a renowned lab at the forefront of the field. My time spent here in the lab will certainly provide ample experiences as I transition into a future career as a physician.


Lily McCarthy - Junior
I am an Economics and Psychology major who loves spending time with children. I am excited to join the lab and have the opportunity to learn more about child development and the research process through hands on experience. I am looking forward to interacting with families as well as gaining a better understanding of the earliest stages in the development of the human mind.


Lindsay Martin - Junior
I am a Junior Psychology and English double major. I love spending time with children. I have worked as a swim instructor for several years, and I am currently an organizer for the Tutorial Project here at Hopkins. I am thrilled to be working at the Lab for Child Development and look forward to learning about infants' cognitive abilities.


Sofia Cohen - Sophomore
I am a Behavioral Biology major and Bioethics minor on the pre-med track who loves interacting with children and observing their behaviors. I am excited for this hands-on experience as I hope to become a pediatrician in the future. I am primarily interested in researching the underpinnings of how children learn and develop complex behaviors with the hope of improving children's education.


Julia Bernal - Sophomore
I am a Sophomore majoring in Neuroscience and minoring in Psychology on a pre-med track. I am very excited to join this outstanding research team and learn about the current, cutting-edge research being done in child development. I am extremely interested in the innate capabilities of infants in relation to memory and perception and the different cognitive abilities these infants will have at different stages of their life.


Reece Carter - Sophomore
I am a Sophomore Neuroscience and Applied Math major. I'm excited to join the lab and look forward to investigating the relationships between math performance and math anxiety in school aged children.




Courtney Gregor -
Previous graduate student






Aimee Stahl
Ph.D. 2015

Assistant Professor in the Department of Psychology at The College of New Jersey


Melissa Kibbe
Former Post-Doctoral Fellow

Assistant Professor in the Department of Psychological and Brain Sciences at Boston University


Darko Odic
Ph.D. 2014

Assistant Professor in the Department of Psychology at the University of British Columbia, Canada

Melissa Libertus
Former Post-Doctoral Fellow

Assistant Professor in the Department of Psychology at the University of Pittsburgh

Heena Lakhani
M.A. 2012

Science Education Analyst; National Science Foundation (NSF)

Rebecca Rosenberg, Ph.D.
Former Post-Doctoral Fellow

Assistant Professor in the Department of Psychology at Denison University

Mariko Moher
PhD 2011

Assistant Professor of Psychology at Williams Colege

Chad Spiegel
M.A. 2009

Research Assistant; Department of Psychiatry at the F. Edward Herbert School of Medicine

Uniformed Services University of the Health Sciences

Jennifer Zosh
Ph.D. 2009

Professor - Penn State Brandywine

Thesis: Beyond “what” and “how many”: An investigation of working memory for objects in infancy

Len Taing
M.A. 2006

Thesis: Counting in deaf and hearing individuals: An interaction of language and thought



Karen Ho

Use of chunking to increase spatial working memory capacity in preschool-aged children

The Johns Hopkins University Class of 2013

Rachel Austin

Undergraduate Research Assistant
Thesis: On the nature of early representations of plural sets

The Johns Hopkins University Class of 2010

Arin Tuerk

Undergraduate Research Assistant Thesis: Heterogenous object arrays increase working memory capacity in 7-month old infants

The Johns Hopkins University Class of 2008

Meredith Brinster

Undergraduate Research Assistant
Thesis: Inference is better than Instruction: The relative strengths of indirect and direct word learning in preschoolers

The Johns Hopkins University Class of 2007



Summer Internship Program 2017

Back (from left): Gianna Li, Justin Halberda, Lisa Feigenson, Allison Rhodes, Jenny Wang, Jasmin Perez, Alex Silver, Josh Langfus, Samantha Redig, Nadine Rozell

Front (from left): Jennaveve Yost, Kathleen Cracknell, Andrea Quintero, Arianna Hernandez


Summer Internship Program 2013

Back (from left): Lisa Feigenson, Julissa Veras, Darko Odic, Eliza Parrott, Lauren Quast, Cambria Litsey, Hrag Pailian

Middle (from left): Melissa Libertus, Melissa Kibbe, Aimee Stahl, Krista Grubb, Jenny Wang, Justin Halberda

Front (from left): Mandy Skoranski, Rebecca Zhu, Allie Schneider, Karina Hamamouche


Summer Internship Program 2012

Back (from left): Nick Tacke, Casey Hall, Elyse Thulin, Darko Odic, Stephanie Caronna, Grace Lisandrelli, Brent Rappaport

Middle (from left): Amy Lai, Melissa Libertus, Aimee Stahl, Melissa Kibbe

Front (from left): Lisa Feigenson, Mandy Skoranski, Misti Jeffers, Ruxue Shao, Justin Halberda


Summer Internship Program 2011

Back (from left): Lisa Feigenson, Christy Lindahl, Jane Li, Emma Schmitt, Claire Veazey, Alex D'Esterre, Anne Hermes, Darko Odic

Front (from left): Erin Walsh, Lina Montoya, Reba Rosenberg, Aimee Stahl, Heena Lakhani, Melissa Libertus, Mariko Moher, Selin Zeytinoglu, Justin Halberda

Summer Internship Program 2010

Back (from left): Darko Odic, Anna Zamm, Andrea Stevenson, Dominic Gibson

Row 2 (from left): Bhaavana Venkatesh, Tiffany Williamson, Alison Goldstein, Melissa Libertus, Reba Rosenberg

Row 1 (from left): Jennifer Graham, Haesung Kim, Karina Lin, Mariko Moher

Front (from left): Lisa Feigenson, Justin Halberda

Summer Internship Program 2009

Back (from left): Nick Minar, Andrea Stevenson, Katie Muenks, Kirsten Schohl, Darko Odic

Row 2 (from left): Micaela Gonzalez, Hee Yeon Im, Jessica Koski, Chad Spiegel

Row 1 (from left): Xin Yuen, Mariko Yamaguchi, Katie Hudson, Rebecca Rosenberg

Front (from left): Justin Halberda, Lisa Feigenson


Summer Internship Program 2008

Back (from left): Ellen McClure, Jenn Zosh, Lisa Feigenson, Justin Halberda, Kate Ekman, Mariko Yamaguchi

Front (from left): Andrea Stevenson, Miyuki Nishimura, Lenae Stansky, Kelli Hill, Sara Fitt



The Johns Hopkins University Class of 2019

Vyshnavi Anandan

Rama Imad

Arthi Rameshkumar

Madhura Shah


The Johns Hopkins University Class of 2018

Emily Alway

Carol Daffre

Spandana Mandaloju

Natalie Qin

Daphna Varadi


The Johns Hopkins University Class of 2017

Allie McManus

Julia Phoon

Janay Smith

Sansriti Tripathi


The Johns Hopkins University Class of 2016

Clarissa Alfes

Dilara Ertenu

Carli Heiman

Eva Larson

Kelly Sharer


The Johns Hopkins University Class of 2015

Alexa Lantiere

Marisa Santoru

Alex Silver


The Johns Hopkins University Class of 2014

Susan Folsom

Ellie Kaplan

Caren Lewis

Sam Tuepker

Julissa Veras


The Johns Hopkins University Class of 2013

Stephanie Caronna

Geena Frumkin

Karen Ho

Bridget McGowan





Allison Rhodes
Previous Project Coordinator



Monica Daniels
Previous Project Coordinator


Stephanie Caronna
Previous Lab Coordinator



Mandy Skoranski
Previous Lab Manager


Dominic Gibson
Previous Lab Coordinator


Andrea Stevenson
Previous Lab Coordinator