(b New York, 1 March 1940). Venezuelan conceptual and performance artist. She studied psychology at the Universidad Central de Venezuela, Caracas, and sat in on classes at the Escuela de Artes Plásticas Cristóbal Rojas (now the Escuela de Artes Visuales Cristóbal Rojas) in Caracas, at which she later taught (1983–94). In 1962–6 she studied art at the University of California, Los Angeles (UCLA), graduating with a degree in Plastic Arts (1966). Sosa returned to Venezuela in 1966 and combined her work with investigations into the expressive possibilities of the body. She was a founder-member of the dance group Contradanza (1973–6) and performed in Las cosas que nos pasan in Caracas. From 1970 she was highly active as a teacher of expression through movement and the plastic arts. In her work (examples in Caracas, Mus. B.A. and Ciudad Bolívar, Mus.) she reflected upon the surface and space and on the body as an instrument for the comprehension of such space. Sosa also used the chair as a structure from which to ponder the world, space and the role of the spectator.