An appendix contains supplementary material that is not an essential part of the text itself but which may be helpful in providing a more comprehensive understanding of the research problem and/or it is information which is too cumbersome to be included in the body of the paper. A separate appendix should be used for each distinct topic or set of data and always have a title descriptive of its contents.
Tables, Appendices, Footnotes and Endnotes. The Writing Lab and The OWL. Purdue University.
Your research paper must be complete without the appendices, and it must contain all information including tables, diagrams, and results necessary to understand the research problem. The key point to remember when including an appendix is that the information is non-essential; if it were removed, the reader would still be able to the research.
It is appropriate to include appendices to..
Appendices. Academic Skills Office, University of New England.
I. General Points to Consider
When considering whether to include content in an appendix, keep in mind the following points:
Never include an appendix that isn’t referred to in the text. All appendices should be summarized in the your paper where it is relevant to describing your findings. Here are some examples of items that can be included in an appendix:
NOTE: Do not include vague or irrelevant information in an appendix; this additional information will not help the reader’s overall understanding and interpretation of your research and may only distract the reader from understanding your research study.
Here are some general guideline on how to format appendices, but consult the writing style guide [e.g., APA] your professor wants you to use, if needed:
Appendices. The Structure, Format, Content, and Style of a Journal-Style Scientific Paper. Department of Biology. Bates College; Appendices. Academic Skills Office, University of New England; Tables, Appendices, Footnotes and Endnotes. The Writing Lab and The OWL. Purdue University; Lunsford, Andrea A. and Robert Connors. The St. Martin's Handbook. New York: St. Martin's Press, 1989; What To Know About The Purpose And Format Of A Research Paper Appendix. LoyolaCollegeCulion.com
Consider Putting Your Appendices Online
Appendices are useful because they provide the reader with information that supports your study without breaking up the narrative or distracting from the main purpose of your paper. If you have a lot of raw data or information that is difficult to present in textual form, consider uploading it to an online site. This prevents your paper from having a large and unwieldy set of appendices and it supports a growing movement within academe to make data more freely available for re-analysis. If you do create an online portal to your data, note it prominently in your paper with the correct URL and access procedures if it is a semi-secured site.
Piwowar, Heather A., Roger S. Day, and Douglas B. Fridsma. “Sharing Detailed Research Data Is Associated with Increased Citation Rate.” PloS ONE (March 21, 2007); Wicherts, Jelte M., Marjan Bakker, and Dylan Molenaar. “Willingness to Share Research Data Is Related to the Strength of the Evidence and the Quality of Reporting of Statistical Results.” PLoS ONE (November 2, 2011).