Leonor Pereira da Costa concluded the PhD in Psychology at the Center for Research and Social Intervention of ISCTE - University Institute of Lisbon, with a thesis titled "Navigating social class in childhood: Development of Intergroup relations and Self-Categorization". Leonor completed her degree in Psychology in the Faculty of Psychology and Educational Sciences of the University of Porto and completed her master's degree in Data Mining and Data Analysis at ISCTE. Currently she is Assistant Professor at LusófonaUniversity, in the School of Psychology and Life Sciences. She also developed her work as an Applied Research Assistant at the ResearchCenter of Public Opinion of the Catholic University of Portugal, where she collaborated in numerous national and international research projects. Her interests are focused on intergroup relations and behaviors of inclusion and social exclusion in childhood, with special focus on social inequalities related to children's socioeconomic status.