I thank God for the opportunity of completing this Master's degree program.I am very grateful to my family for always supporting me and for encouraging me to follow my dreams. I thank you for always being there, showing me that I was capable and giving me strength in the most challenging moments, for trusting me when I didn't trust myself, for supporting my every decision, and for never letting me give up. I love them, and I am grateful for the life they have given me.I thank my fiance, André, for being beside me daily, for comforting me during my moments of frustration, but also for sharing my happiness. Thank you so much for your companionship, love, and understanding throughout this period. I also thank your family for always motivating me.I am extremely grateful to my advisor, Esther. She has always shown her passion for what she does and has become a great example. Esther has always been very patient, motivating, and spared no effort to help me when I was having difficulties. Thank you so much, Esther, for all the knowledge, for the conversations, for believing in me and encouraging me to always look for more.I would also like to thank my roommates, Carol and Dani. Girls, thank you so much for everything, for the dance and pizza nights, for all the jokes and stories. Thank you so much for all the time we spent together over these years. You made my days lighter.I would also like to thank my friends, Caroline Nogueira and Amanda Guigen, for all the help they gave me in the area of psychology, child development, and all the theoretical human background necessary for this research.I am also grateful for my professors at UFSCar, who introduced me to research and academic life, especially to Tiemi, Luciana, Cândida, and Gustavo. You have always shown me how beautiful knowledge is and how important science is.I would like to thank my friends at UNICAMP. My laboratory team, LaRoCs, for all the exchange of knowledge. Special thanks to my friends Carol, Sara, Andressa, Renan, Luã, and Fabricio for being with me daily, for each coffee we had, each lunch, the advice. Thank you for the fellowship and for making my days happier.I also want to thank my friends outside UNICAMP. Special thanks go to Elisa, Isabela