Research: What it is.
A research paper is the culmination and final product of an involved process of research, critical thinking, source evaluation, organization, and composition. It is, perhaps, helpful to think of the research paper as a living thing, which grows and changes as the student explores, interprets, and evaluates sources related to a specific topic. Primary and secondary sources are the heart of a research paper, and provide its nourishment; without the support of and interaction with these sources, the research paper would morph into a different genre of writing (e.g., an encyclopedic article). The research paper serves not only to further the field in which it is written, but also to provide the student with an exceptional opportunity to increase her knowledge in that field. It is also possible to identify a research paper by what it is not.
Research: What it is not.
A research paper is not simply an informed summary of a topic by means of primary and secondary sources. It is neither a book report nor an opinion piece nor an expository essay consisting solely of one's interpretation of a text nor an overview of a particular topic. Instead, it is a genre that requires one to spend time investigating and evaluating sources with the intent to offer interpretations of the texts, and not unconscious regurgitations of those sources. The goal of a research paper is not to inform the reader what others have to say about a topic, but to draw on what others have to say about a topic and engage the sources in order to thoughtfully offer a unique perspective on the issue at hand.
-- Baker, J.R., & Brizee, A. (2010). Genre and the research paper. Retrieved August 17, 2010, from http://owl.english.purdue.edu/owl/resource/658/02/