"theories of writing that inform writing programs"

They present brief overviews of the major writing theories/pedagogies and then correlate the characteristics of writing theories with characteristics of portfolios: "we relate the theoretical side with portfolio theory in order to discover where the two kinds of theory are compatible and where they are at odds" (38).

The theories of writing are: formalism, expressivism, cognitivism, collaborative learning, social constructionism, and process. Of course, one could write a book on the intersection of any one of these theories and portfolio assessment. Hamp-Lyons and Condon do no more than provide thumbnail sketches for each of these theories.