The technique has been in existence in one form or another even since the days of classical rhetoric. However the first writer to really championed the mode was James Joyce.
Fiction
No.
Modernist writers of fiction tended to prefer indirect characterization. Modernist writers also preferred unreliable narrators. Other literary devices used in modernist writing were stream-of-consciousness and interior monologue.
stream of consciousness writing.
Faulkner's writing is known for its complex narrative structure, stream-of-consciousness style, and experimental techniques, which are distinct from formulaic fiction. His works often explore themes of the American South, memory, time, and the complexities of human nature, setting him apart from conventional formulaic storytelling.
To show how a person's thoughts flow
the "stream of consciousness" technique.
Yes they do.
stream-of-consciousness writing.
To show how a person's thoughts flow
Journaling or stream of consciousness writing involves recording thoughts and feelings as they occur in a continuous flow without worrying about grammar or structure.
Personal EssayMemoir, personal essay, or persuasive piecean op-ed or opinion piece.