Developmental Psychology to the life of a person of a marginalized group. In particular, you will be focusing on how marginalization has impacted their life trajectory, as well as how any protective factors have influenced their development. Marginalization is a cultural phenomenon where groups of people with a distinctive feature are not fully accepted into the larger group, causing them significant stress than can impact their developmental trajectories. Marginalization can occur due to race, socio-economic status, sex, gender, sexuality, disability, religion, age, etc.