Wayne Booth (1961/1983) proposed the key concept of the implied author, as well as the continuing influence of that concept in research on literary narrative via the model that has come to be called the "narrative communication diagram". A compromise formation, the implied author allows for textual designs-that is, what readers, viewer, or interlocutors construe as the nonrandom patterning of textual features-to be accounted for through attributions of intention to a designing agent. 

But these explanatory attributions are now displaced onto eh mock psychology of a (textually marked) role or persona, whose inferred communicative aims and larger value orientation afford a rhetorical context for interpreting acts of narration. (source)