While the conclusions of the major literature reviews already cited would seem to discourage yet another literature review on relationships of auding to reading, we believe that such a review may be profitable-if we follow Frase's injunction and organize the existing facts according to some systematic scheme.
One such scheme was developed by Schlesinger (1968) and modified and used by Carroll (1971) in his extensive review on learning from verbal discourse:
While such a system is useful for categorizing studies into the bracketed categories (which is all Carroll intended it for), it provides no basis for theoretical integration, for the construction of relationships among the "facets" of the statement. Moreover, it generates no useful hypotheses for extending beyond the assembled facts. For these reasons such a scheme is not a very useful tool for literature review and synthesis beyond the fact-sifting stage.