Research Team

Dr. Katharine Graf Estes, Principal Investigator - Lab Director

Infants are immersed in a world of immense complexity, yet they display knowledge of the people, objects, actions, and sounds in their environments very early in life. My research explores the mechanisms that support this early learning. In particular, the ability to detect statistical regularities may play a fundamental role in how infants learn about a highly complex, highly salient aspect of the auditory world: language. Infants become especially attuned to regularities in the sound patterns of the ambient language, including its phoneme distinctions, sound combinations within words, and its cues to word boundaries in fluent speech. Thus, when infants begin to understand and produce words, they do not start as a blank slate. I am investigating how infants learn from statistical regularities in the language they hear and the nature of what they learn.

Andrea Ramirez Barajas, Doctoral Candidate

I am a fifth year doctoral student in the Developmental area in the Psychology department. I graduated from UC Davis with a degree in Spanish and Psychology B.A. Before starting my PhD at the lab, I worked as a McNair Scholar for two years with Dr. Graf Estes where I was able to conduct and present research in infant bilingual language acquisition. I am broadly interested in the variations in lexical and acoustic properties in a bilingual as well as a monolingual population. More specifically, I’m interested in parent-child interactions and the effect the parent’s speech has on their infant’s language development in a social context. ​

Jenna DiStefano, Graduate Student

I am a second year psychology doctoral student in the developmental area. I graduated from the University of Pennsylvania with a bachelor's degree in Psychology, minoring in ASL/Deaf Studies and Education. Before joining the lab as a PhD student, I worked as a lab manager for Dr. Duane Watson at Vanderbilt University, supporting studies relating to language and cognition. My current research interests broadly relate to infant language acquisition. More specifically, I am interested in the language acquisition of Deaf infant populations learning American Sign Language (ASL) -- especially those who live in a predominantly hearing social environment.

Işıl Doğan, Graduate Student 

Işıl earned her M.A. in Developmental Psychology under the supervision of Dr. Tilbe Göksun at Koç University in Istanbul. She is interested in understanding how infants acquire language and how they integrate language and cognition. To explore these topics, she investigated the precursors of individual differences in multimodal language comprehension and production in her master’s thesis. She has also focused on both internal factors (e.g., neonatal status, individual differences in early processing of language) and external factors (e.g., caregiver multimodal input, caregivers’ beliefs) in building blocks of cognition. Currently, Işıl is researching how infant-directed speech produced by caregivers aligns with their gestures during specific play tasks at the Language Learning Lab.


Jiaqi (Jenny) Geng , Graduate Student 


Language learning doesn’t happen in isolation, instead, it is a manifestation of one’s cultural background, experience, and values. I am passionate about investigating the mechanisms infants use to learn languages in their cultural contexts and through interactions with social agencies, in combination with parental cultural engagements and beliefs. My interests sparked during my B.A. journey at UC Davis, and was further solidified during my research involvement at various labs in the States and my one-year stay abroad in Hong Kong. As a first-year graduate student, I hope to employ a cultural-infused approach to study how culture shapes infants’ language learning trajectories. 


Isabelle Pai, Doctoral Candidate 


I am a Ph.D. student in Developmental Psychology coming from an Economics research background, with a B.A. in Economics from New York University and research experience at Nielsen and GfK after graduation. I received my Master’s degree in Developmental Psychology, with a Cognitive Development concentration, from Cornell University in 2020. My primary research interest is in Cognitive Development, particularly the development of information processing and language acquisition. I am interested in how infants and young children acquire language - how they learn semantic and pragmatic concepts, how they form abstract relations and how this acquisition facilitates their thought formation. In my spare time, I enjoy attending symphonies, cold weather sports such as hockey, figure skating, downhill skiing and spending time in nature.  Finally, I am currently involved in the PICA and INTEL projects with the Infant Cognition Lab, Dr. Lisa Oakes.


Raquel Anguiano, Lab Manager 


Raquel graduated from UC Davis in 2023 with a B.S. in Human Development, B.A in Psychology and a minor in Chicana/o Studies. While working to obtain her degree, she worked as a Research Assistant in the Infant Cognition Lab under the supervision of Dr. Lisa Oakes. This is where she was able to start her journey studying Developmental Psychology and develop a passion for it. With the guidance of Dr. Oakes and her graduate student mentors Shannon Klotz and Van Pham, she was able to focus on a research project that allowed her to study both visual attention and language aquisition in a naturalistic setting. Now, Raquel hopes to use her time at the Language Learning Lab to further explore all aspects of cognitive development, with an emphasis on Mexican American populations. 


Clariss Bolanos, Undergraduate Research Assistant 

I am a fourth-year undergraduate student majoring in Human Development and psychology at UC Davis. I was born in San Francisco, and I was raised in the Bay Area by my parents who have immigrated from the Philippines. They are a big influence to me as they support me in my journey as a first-generation college student. My academic and career goals include working with children with communication and speech disorders. I was drawn by the Language Learning Lab because I am fascinated by the process in which infants and young children acquire language and communication skills. I am also interested in studying multilingual acquisition in children. I was fortunate to grow up in a diverse community since I was exposed to a variety of languages growing up, and this fueled my interest in linguistics and my life-goal to become fluent in many different languages. 

Julissa Diaz Garcia, Undergraduate Research Assistant

I'm a 2nd year majoring in psychology, from Ceres, California and I'm the youngest of three girls. I was raised in an English and Spanish speaking environment. When I was younger I mainly spoke English but in recent years I've grown more confident in my Spanish speaking skills. I'm where I am today because when taking Ap Psychology my senior year, I was fascinated with the developmental unit about how children learn and grow. It became a big interest of mine, and I want to gain a deeper understanding of  how children learn from the world around them. This lab interested me because I grew up in a bilingual environment, it's something I feel connected to and want to learn more about. I'm excited to be getting experience in a subject I find fascinating.

Taryn Isabel Quilici, Undergraduate Research Assistant

I am a fourt-year undergraduate student at UC Davis majoring in Psychology and minoring in Human Development. I am from Chico, CA where I began working with children through various volunteer opportunities and summers as a camp counselor. I love working with children and have always known that I want to work with this age group in some capacity. I have greatly enjoyed my coursework in developmental psychology, which inspired me to look into research opportunities in this field! I am so excited to learn more about language development in my time at the language learning lab. After graduation, I hope to attain my Psy.D in Clinical Psychology to become psychologist and support children and teens. In my free time, I like to bake, read, crochet, and spend time with friends.

Susie Wu, Undergraduate Research Assistant

I am a third-year undergraduate student at UC Davis majoring in psychology and statistics. Growing up in a multilingual environment in China, I was exposed to multiple languages from an early age and have always been fascinated by the difference in language acquisition among infants and children. In the future, I would like to do human development as my major and am willing to be a UXR focusing on products helping children in need. In my free time, I enjoy reading and learning new things which could help me expand my knowledge and explore new ideas.

Kimberly Gomez-Garcia, Undergraduate Research Assistant

I am a third-year undergraduate student from the Bay Area double-majoring in Psychology and Spanish. Being fluent in both English and Spanish since childhood, I have always had an interest in constantly improving my language skills. As the eldest of five siblings, I would say I have plenty of experience working with children, an aspect of my life that I have always enjoyed. This inspired my interest to pursue a career centered around supporting children. I hope to utilize the knowledge I have developed here at UC Davis to contribute to this lab. I am especially eager to participate in this lab because of how closely it aligns with my career interests and passions. I hope to continue learning about languages and child development. 

Gabriel Piceno Serrato, Undergraduate Research Assistant

Hi! I’m a 4th year, double majoring in Psychology and Spanish with a minor in Human Development. I am originally from México but was raised in the Bay Area for the majority of my life. I have a deep passion for working with children and an even bigger passion for psychology. As a result, the language learning lab was a dream come true and it is an honor to be able to study children which will one day be the future of our world. Having such a love for my culture and its language, I hope the lab allows me to gain more insight into the role that language plays in the development of children. Being an undergraduate student, I also hope to gain experience in the field of psychological research and work alongside such an amazing group of people!

Sheba Queen Alvarado, Undergraduate Research Assistant


I’m a 3rd year undergraduate psychology major, minoring in linguistics as a language teacher. I was born in the Philippines, then moved to San Francisco when I turned ten. Being raised within the context of two cultures, I have been defined and shaped by my multilingual identity. That is why I am excited to join Language Learning Lab and be a part of the work they have started here. I seek to combine my interests in linguistics, my Asian-American heritage, and psychology in exploring the facets of education that will enrich a child’s development and where I can be involved in it. Gaining more experience working with children, being a team member, and diving deeper into psychology research are some of the key reasons why I have been led to LLL. Outside of the lab, I am an editor for a student-run psychology journal at UC Davis, Aggie Transcript: Psychology. In my free time, I love to cook, snuggle up with a book, or sometimes a movie—but definitely with a cup of coffee.

Judy Xiong, Undergraduate Research Assistant

 

Hi! I am a third-year undergraduate student double majoring in Psychology and Human Development. I grew up in southern China speaking Mandarin. I started to learn English when I was in primary school, but only in class. This made me want to know how children who live in a bilingual environment can learn languages differently from me. I also have a great passion for working with children. My experience as a counselor made me curious about how children would end up differently and how their background and growing-up environment could impact their development.


 Chengyi Li, Undergraduate Research Assistant 


Hello everyone, I'm Chengyi. I am a first year student studying linguistics, planning to graduate in 2027. First language acquisition is one of my interests which is why I took up this lab. After graduation I plan on attending grad school to specialize in a field of linguistics. I am from a small part of Sacramento where there's not much to do besides watch movies and hangout, but it's really what you make out of it! Besides studying I am an avid language learner (started with Spanish, moving on to Cantonese/Mandarin), which also gravitated me towards this lab.


Jai Mehta, Undergraduate Research Assistant


I am a third year undergraduate student majoring in Psychology. I was born and brought up in India till I was 10 years old, when we moved to the US, and have lived in Cupertino ever since. Being the oldest child, I always had to take care of my younger sister and cousins at family reunions. Watching them learn so many things at such a rapid pace was so interesting, and as someone who grew up learning 3 languages, I wanted to learn about how kids are able to learn so quickly. This motivated me to apply and join the language learning lab as I hope to broaden my knowledge, work alongside kids, and be able to apply my learning in the future as a psychologist. In my free time, I love to game, play spikeball, and go on runs. 


Divisha Singh, Undergraduate Research Assistant 


I am a third year undergraduate student majoring in Neurobiology, Physiology, and Behavior.  I am from Sunnyvale, CA and grew up speaking English and Hindi at home. My bilingual background and my interest in developmental psychology inspired me to join the Language Learning Lab. I’m curious to learn more about how the brain-behavior relationship in infants is capable of having such a profound impact on early language development. As an older sibling and older cousin, seeing this language development in children around me has also piqued my interest in understanding the science behind this growth. Outside of classes, I enjoy listening to music and spending time outdoors.


Ruby Lara, Undergraduate Research Assistant 


Hello! I am a third-year transfer student with a double major in Linguistics and Spanish. I was born and raised in a small agricultural town in Monterey County, California. My major in Linguistics stems from my upbringing in a diverse community of Spanish and dialect speakers. I grew to appreciate the intricacies of individual languages, how they interact, and the cultures accompanying them. My experience with English as a second language and rich exposure to various dialects have prompted my interest in the Language Lab. What piques my interest the most is bilingual education and helping to improve ESL programs to encourage the learning and retention of two languages simultaneously, as I intend to be an ESL educator. I am enthusiastic about learning more about early childhood language development and how it is influenced by culture and the surrounding environment. Outside my studies, I enjoy reading fiction and social science genres, crafting, and hiking


Crystal Bueras, Undergraduate Research Assistant 


Hi everyone! I am a third year student majoring in Psychology with a minor in Human development. I am a single child and was raised in a predominantly Spanish-speaking household. I grew up in Coachella, CA mainly with my mom and grandma who both came from Perú. My grandma came to the U.S. to live with us when I was 4, speaking only Spanish; so she took it upon herself to teach me Spanish since I had no knowledge of any Spanish, so we would be able to communicate together. My bilingual background from learning a new language at a young age and interest in Developmental Psychology inspired me to join the Language Learning Lab. In my free time I enjoy reading, and spending time with my friends.


Caitlin Chung, Undergraduate Research Assistant 


I am a second-year undergraduate student majoring in Applied Statistics. I’m from San Francisco, California and grew up in a bilingual household speaking both English and Mandarin. From an early age, I was exposed to multiple languages whether it be from TV shows, cartoons, summer camps or school environments. My fascination with languages and cultures was further sparked by my experiences working with children as a swim instructor and camp assistant, both roles focused on young children. These interactions deepened my interest in child development as well as their ability to navigate the complexities of language. I am passionate about merging my interests in language, child development as well as statistics and am looking forward to expanding my knowledge and continue working alongside children in this lab. In my free time, you can find me curating Spotify playlists to match the latest book I’ve read, sketching fan art or indulging in TV shows.


Adalai Nolazco Barajas, Undergraduate Research Assistant 


 Hello! I am a third-year undergraduate student majoring in Psychology with a minor in Human Development. I was born and raised in Sonoma, a small wine town, and I grew up only speaking Spanish until I entered elementary school and began learning English. My own experiences sparked my interest in bilingual language acquisition, so I’m excited to be a part of the Language Learning Lab. Most of my relatives are younger so I’ve always loved to be surrounded by children. I learn so much from them and am always fascinated by their milestones and I love learning the science behind every stepping stone. After my undergraduate, I hope to pursue a career as a Speech Language Pathologist and continue working with children and learning about language development. In my free time, I enjoy reading, watching sitcoms, and spending time with friends and family.