On the first day, I arrived at Tomasello Lab at Duke a few minutes earlier than 9 and found that I was one of the three people who arrived the earliest. I first met and introduced myself to Amanda, a lab manager, and Celia, a Senior Theses Student at the neighboring Empathy Development Lab (since the PI of the neighboring lab is the wife of my PI and the two labs are both part of Duke Child Studies, their labs basically work together all the time). After familiarizing myself with the purpose of different rooms, I used the first day to finish CITI Program training before I started doing work. Then on the second day, I started working with Celia on her project about how parenting styles relate to parenting behaviors, and how they affect children’s self-regulation. During the first week, 11 groups of parents and their children came to the lab and participated in Parent-Child Play Task. Specifically, the children were instructed to make four different shapes (triangle, house, pyramid, ...