Unfortunately, this article is an opinion piece with research done that was very limited in scope. With only two participants, it would be difficult to extend any conclusions beyond the bounds of this study. It does seem intuitive that writers would respond by expanding upon their thoughts given content-based feedback than when given form-based feedback. It is nice to see this hypothesis operationalized and tested. It doesn't seem to really get at whether question forms are more valuable for processing and revision than declarative feedback. It would be interesting to see the work expanded, and the researcher design research that would be more demonstrative of the efficacy of different types of feedback.