October 2025

In this monthly section, we share updates about the research happening at the Children’s School. These research projects, observations, and special class projects support our mission and are part of our daily life as a laboratory school. Our program is enriched by these connections and opportunities and I am excited to share these updates with the Children’s School families. Please let me (Dr. Vales) know if you have any questions about research.

In this first research update I want to share some of the protocols we have in place to ensure the children have a positive experience when helping the researchers with their projects. Children new to the Children’s School participate in a practice research session with a familiar educator at the beginning of the year; this helps everyone learn the routine of doing a research “game”. In addition, all researchers working with children spend some time with the children in the classroom prior to starting their project; this helps make sure that the researchers are familiar to the children when the time comes to work with them.

Three research projects are already underway this semester! Hilary Alonso, an undergraduate honors thesis student working with Dr. Sharon Carver, is doing the Ballet Study with the PreK/Kindergarten classroom. Mady Davis-Troller, a Ph.D. student working with Dr. Erik Thiessen, is doing the Relaxing Video and Odd-Fish-Out games with the children from the PreK/Kindergarten and the Preschool Fours classrooms for whom we have fNIRS consent. Ricky Choi, a Ph.D. student working with Dr. David Raksion, is doing the Mystery Machine study with all classrooms. Stay tuned for more details about these studies in upcoming Lab School Updates!

Finally, we also have undergraduate students from Dr. David Rakison’s Developmental Psychology course observing in our classrooms. For each assignment, the students observe some aspect of the children’s behavior, such as language or motor development, with the goal of relating their observations to the material they are learning in class. Mrs. Stilinovich coordinates these observations to make sure that we have a small number of students observing at a time and she also helps the students be unobtrusive during their observations. We are also hosting students from the Creative Kinetic Systems course in the Preschool Fours classroom. These students are developing musical instruments and sound-producing gadgets, and the children will help them test their creations.

Stay curious!

Dr. Catarina Vales

November 2025

In this newsletter I want to share three studies that we are hosting at the Children’s School this semester. If you have any questions about research, please let me (Dr. Vales) know!

Hilary Alonso (an undergraduate honors thesis student working with Dr. Sharon Carver) is doing the Ballet Study with the PreK/Kindergarten classroom. This study is looking at the effects of ballet classes on visual patterning skills. Previous research shows that patterning skills are related to mathematical skills, likely because early math concepts like counting or quantitative reasoning include regularities, rules, and structure. Drawing on her own experience teaching ballet to young children, Hillary wondered whether ballet classes – which expose students to movement patterns – would lead to improvements on visual patterning skills. To make sure that she can attribute any changes on patterning skills to taking ballet classes (rather than, for example, learning patterning skills in the classroom), Hilary needed to have a control group; to ensure that she is not depriving half of the classroom from the potential benefits of the ballet lessons, Hilary is using a very neat study design called “switching replications”. What this means in practice is that Hilary assigned students to receive the ballet classes either in the Fall or the Spring. In the Fall, the students in the “Fall” group receive the ballet classes and the students in the “Spring” group are the control group; then, in the Spring, the groups switch – the “Spring” group receives the ballet classes and the “Fall” group does not. At three time points during the school year, Hilary works individually with students to complete assessments that require identifying, copying, and extending visual patterns. We look forward to seeing what Hilary learns from this study.

Mady Davis-Troller (a Ph.D. student working with Dr. Erik Thiessen) is doing the Relaxing Video and Odd-Fish-Out games with the children for whom we have consent to participate in fNIRS studies. Together with undergraduate student Smrithi Krishnaswamy, the research team is looking at how activity in the frontal cortex is connected to children’s developing executive function skills, like attention and self-control – which undergo marked changes during early childhood. This study has two sessions. In one session, the children wear an appropriately sized fNIRS cap while watching a short calming video (like a moving screensaver); this allows the researchers to record a consistent measure of the brain at rest. The children also play the “Odd Fish Out” game, where they see a row of fish on the screen and are asked to choose the direction the middle fish is facing, while ignoring the directions of the fish on either side. Sometimes the surrounding fish point in the same direction as the middle fish (the easier trials) and sometimes the surrounding fish point in opposite directions (the harder trials, requiring executive functioning). By comparing the two types of trials and relating the responses in the fish game to the fNIRS brain data, the researchers can measure how attention and self-control are supported by the brain’s frontal regions. Mady and her team will continue to work with the children over the school year to better understand how brain connectivity in the frontal cortex changes with age and how everyday experiences relate to growth in early childhood.

Ricky Choi (a Ph.D. student working with Dr. David Rakison) and two undergraduate students, Marissa Fernandez and Katie Bell, are doing the Mystery Machine study with all classrooms. The researchers are interested in how young children use category membership to make inferences about new information. For instance, imagine that children taste lemon and orange juice mixed together, and the combination tastes sour. Later, they taste lemon juice alone, finding it sour. How will children reason about orange juice afterward? Will they reconsider whether the orange juice contributed to the sour taste of the original mixture, or will they assume all citrus fruits are sour based on category membership?To ensure that children are not using their previous knowledge about categories like fruit, the researchers first teach children new categories in the study by showing them videos of objects belonging either to the same category (having identical internal patterns) or to different categories (each object having a unique pattern). After learning these new categories, the children get to see the three objects interacting with a Mystery Machine, successfully activating it. Then, the children see one object interact with the machine alone – either activating it or not. To understand whether category membership guides children’s inferences, the children are then asked to make guesses about which different combinations of the objects (individual objects, pairs of objects, and all three together) can activate the machine. The answers to these questions will help the research team learn more about how causal reasoning develops between ages 3 and 6, and how category membership shapes this development. 

Stay curious!

Dr. Catarina Vales