Literary Criticism now analyzes oeuvre as early, late, comedy, tragedy, etc., but will analyze works as to which of the author’s alternate personalities participated.

In the beginning, The Bible was thought to have been written by one person, but scholars now see it as written by many: https://en.wikipedia.org/wiki/Authorship_of_the_Bible.

Similarly, it was once thought that novelists had one personality, who wrote different ways in different works, according to writing career stage and changes in interests or moods. But since it has become known that writers have multiple personality, a new analysis, as to which of their alternate personalities participated in the writing of a particular work, may be expected. (However, I’m not holding my breath.)