They developed new and improved versions of the color and doll tests used in her thesis for a proposal to further the research.
She had a hard time getting a job; she lost job opportunities to less qualified white men and white women.This was a "kick start" to her life’s work and led to her most significant contributions in the field of developmental psychology.Kenneth and Mamie Clark decided to try to improve social services for troubled youth in Harlem, as there were virtually no mental-health services in the community.Her father also supplemented his income as a manager at a nearby vacation resort.Her mother helped him in his practice and encouraged both their children in education. Her father’s occupation and income allowed them to live a middle-class lifestyle and even got them into some white-only parts of town.The Clarks testified as expert witnesses in Briggs v.Elliott (1952), one of five cases combined into Brown v. The Clarks' work contributed to the ruling of the U. Supreme Court in which it determined that de jure racial segregation in public education was unconstitutional. Board of Education opinion, "To separate them from others of similar age and qualifications solely because of their race generates a feeling of inferiority as to their status in the community that may affect their hearts and minds in a way unlikely to ever be undone".One of Mamie's first jobs was as a secretary at the Office of William Houston.This law firm involved the planning of legal action that would challenge the segregation laws.The inspiration for her thesis came from working at an all black nursery school.Mamie contacted psychologists Ruth and Gene Horowitz for advice.