 The Matilda Effect is a bias against acknowledging the achievements of women scientists, whose work is attributed to their male colleagues. This phenomenon was first described by Matilda Jocelyn Gage in her essay, Woman as Inventor. The term Matilda Effect was coined by science historian Margaret Rosseter. Several scientific inventions and even Nobel Prizes have been attributed to male colleagues for female colleagues work. The phenomenon of women becoming ghosts in scientific research without getting due credit for their contribution is termed the Matilda Effect.