Mamie Clark (1917–1983), African-American psychologist active in the civil rights movement Helen Flanders Dunbar (1902–1959) important early figure in U.S. psychosomatic medicine[72] Tsuruko Haraguchi (1886–1915), Japanese psychologist Margaret Kennard (1899–1975) did pioneering research on age effects on brain damage, which produced early evidence for neuroplasticity Grace Manson (1893–1967), occupational psychologist Rosalie Rayner (1898–1935), American psychology researcher[73] Marianne Simmel (1923–2010), American psychologist, made important contributions in research on social perception and phantom limb.[74]