The concept of boundaries, as borders that separate two entities, can be problematic in that those who "belong" within a boundary in a given social world or entity are separated from those who do not, creating binaries. The field of literacy research has had a long history of binarism in which instructional methods, epistemological positions, and paradigms have been pitted against one another. An ontological discussion of the nature of boundaries, combined with a content analysis of journal citations, revealed that current literacy research is characterized more as "multidisciplinary" rather than "interdisciplinary", suggesting that literacy research may be characterized by disciplinary binarism. A situational analysis of the social worlds and arenas present in an interdisciplinary research project illustrates the complexity of interdisciplinary partnerships and the manner in which boundary objects can be created to negotiate boundaries and avoid intellectual, disciplinary, epistemological, and methodological nativism.