Answer: “Appositive and parenthetical structures are often used as ways of inserting personal voice into formal academic writing.” AL Palacas. 1989. P. 213.
Comment: Interesting. I still think “voice” in writing is poorly defined—especially, when it is “personal.” Should not be a part of evaluation. RayS.
Title: “Annotated Bibliography of Research in the Teaching of English.” JD Marshall and RK Durst, Eds. Research in the Teaching of English (May 1990), 205-221.