Between the 1960s and 1970s, Pêcheux worked with a group of researchers to theorize what he called "materiality" of discourse, giving continuity to the theoretical work of Althusser in the field of linguistics, but also, at the same time, challenging the proposal for discourse analysis of Zelig Harris.
During the 1960s and 1970s, Pêcheux collaborated with researchers to develop a concept called "materiality" of discourse, building on Althusser's ideas in linguistics while also critiquing Zelig Harris's approach to discourse analysis.