It means self-criticism.
Related: Heterocriticism
Self-criticism, according to Julia Kristeva and other contemporary semiotics, is a hallmark of semiotic research.
At every stage of its production, such research is not encouraged (according to Kristeva) to think “about its object, its instrument and the relationship between them.”
This makes semiotics “an open form of research, a constant critique that turns to itself and offers its own revision.“