Sentence:  While the most popular interpretative scheme in Barthes's book proved to be his <WSD>binarism</WSD> between the studium and the punctum (the theme and the informational content of the photograph on the one hand, and its affective impact, on the other) ... 
Meaning of the word marked with <WSD> tags:  Belief in, or a mode of thought predicated on, a binary; belief that something (for example, gender) is a binary.