Research Interests:
Dr. O'Sullivan's research interests are in macro (social) and micro (relational) implications of mediated communication. He melds his background in mass communication and interpersonal communication into a research program concerned with theory development and practical issues surrounding the use of various communication technologies (new and old).

Past and current research topics include: new technologies and interpersonal, relational, political, and health communication. Dr. O'Sullivan also has a background in communication law and policy with a special interest in the legal and political implications of new technologies. He uses primarily quantitative methods but also uses some qualitative methods.

Teaching Interests:
Dr. O'Sullivan's teaching assignments include undergraduate courses in the social aspects of communication technologies and communication law and policy, as well as graduate seminars in theoretical approaches to the social dynamics of communication technologies. He also has taught courses in interpersonal communication health communication, mass media effects, and broadcast law and policy courses.

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