Wikipedia:No original research
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Wikipedia does not publish original research or original thought. This includes unpublished facts, arguments, speculation, and ideas; and any unpublished analysis or synthesis of published material that serves to advance a position. This means that Wikipedia is not the place to publish your own opinions, experiences, or arguments. Citing sources and avoiding original research are inextricably linked: to demonstrate that you are not presenting original research, you must cite reliable sources that are directly related to the topic of the article, and that directly support the information as it is presented.
No original research is one of three core content policies. The others are neutral point of view and verifiability. Jointly, these policies determine the type and quality of material that is acceptable in articles. Because they complement each other, they should not be interpreted in isolation from one another, and editors should familiarize themselves with all three.
If you have original research or commentary to contribute to a subject, there are numerous other places to do so, such as at WikiInfo.
The "Original research" rule does not forbid routine calculations (like adding numbers, rounding them, turning them into percentages, putting then on a graph, or calculating a person's age, or giving the distances between geographical points) that add no new information not already present.
Sources
Research that consists of collecting and organizing material from existing sources within the provisions of this and other content policies is encouraged: this is "source-based research", and it is fundamental to writing an encyclopedia. Take care, however, not to go beyond what is expressed in the sources or to use them in ways inconsistent with the intent of the source, such as using material out of context. In short, stick to the sources.
If no reliable third-party sources can be found on an article topic, Wikipedia should not have an article about the topic.
Reliable sources
Any material that is challenged or likely to be challenged must be supported by a reliable source. Material for which no reliable source can be found is considered original research. The only way you can show that your edit does not come under this category is to produce a reliable published source that contains that same material. Even with well-sourced material, however, if you use it out of context or to advance a position that is not directly and explicitly supported by the source used, you as an editor are engaging in original research; see below.
In general the most reliable sources are peer-reviewed journals and books published in university presses; university-level textbooks; magazines, journals, and books published by respected publishing houses; and mainstream newspapers. As a rule of thumb, the more people engaged in checking facts, analyzing legal issues, and scrutinizing the writing, the more reliable the publication. Material that is self-published, whether on paper or online, is generally not regarded as reliable, but see this section of Verifiability for exceptions.
Using sources
Information in an article must be verifiable in the references cited. Article statements generally should not rely on unclear or inconsistent passages nor on passing comments. Passages open to interpretation should be precisely cited or avoided. A summary of extensive discussion should reflect the conclusions of the source's author(s). Drawing conclusions not evident in the reference is original research regardless of the type of source. It is important that references be cited in context and on topic.
Synthesis of published material which advances a position
Synthesis occurs when an editor puts together multiple sources to reach a novel conclusion that is not in any of the sources. Even if published by reliable sources, material must not be connected together in such a way that it constitutes original research. If the sources cited do not explicitly reach the same conclusion, or if the sources cited are not directly related to the article subject, then the editor is engaged in original research. Summarizing source material without changing its meaning is not synthesis; it is good editing. The best practice is to write Wikipedia articles by taking information from different reliable sources about a subject and putting those claims on an article page in our own words, yet true to the original intent — with each claim attributable to a source that explicitly makes that claim.
Editors should not make the mistake of thinking that if A is published by a reliable source, and B is published by a reliable source, then A and B can be joined together in an article to come to the conclusion C. This would be a synthesis of published material which advances a new position, which constitutes original research.[1] "A and B, therefore C" is acceptable only if a reliable source has published this same argument in relation to the topic of the article.
Here is an example from a Wikipedia article, with the names changed. The article was about "Jones":
Smith says that Jones committed plagiarism by copying references from another book. Jones denies this, and says it's acceptable scholarly practice to use other people's books to find new references.
That much is fine. Now comes the unpublished synthesis of published material. The following material was added to that same Wikipedia article just after the above two sentences:
If Jones's claim that he consulted the original sources is false, this would be contrary to the practice recommended in the Harvard Writing with Sources manual, which requires citation of the source actually consulted. The Harvard manual does not call violating this rule "plagiarism". Instead, plagiarism is defined as using a source's information, ideas, words, or structure without citing them.
This entire paragraph is original research, because it expresses the editor's opinion that, given the Harvard manual's definition of plagiarism, Jones did not commit it. To make the paragraph consistent with this policy, a reliable source is needed that specifically comments on the Smith and Jones dispute and makes the same point about the Harvard manual and plagiarism. In other words, that precise analysis must have been published by a reliable source in relation to the topic before it can be published in Wikipedia by a contributor.
Citing oneself
This policy does not prohibit editors with specialist knowledge from adding their knowledge to Wikipedia, but it does prohibit them from drawing on their personal knowledge without citing their sources. If an editor has published the results of his or her research in a reliable publication, the editor may cite that source while writing in the third person and complying with our neutrality policy.
It should be noted, however, that editing articles related to or about yourself, by you or those closely related to you, is strongly discouraged, and you are instead encouraged to discuss potential edits to such articles in the relevant talk page.
Original images
Because of copyright law in a number of countries, there are relatively few existing images publicly available for use in Wikipedia. Photographs, drawings and other images created by Wikipedia editors thus fill a needed role. Wikipedia editors are encouraged to take photographs or draw pictures or diagrams and upload them, releasing them under the GFDL or another free license, to illustrate articles. Original images created by a Wikipedia editor are not, as a class, considered original research – as long as they do not illustrate or introduce unpublished ideas or arguments, the core reason behind the NOR policy.
Images that constitute original research in any way are not allowed. It is not acceptable for an editor to use photo manipulation to try to distort the facts or position being illustrated by a contributed photo. Manipulated images should be prominently noted as such. Any image that is found to have manipulation that materially affects its encyclopedic value should be posted to Wikipedia:Images for deletion.
Image captions are subject to this policy no less than statements in the main text of the article. Great care should be taken not to introduce original research into an article when captioning images.
Primary, secondary and tertiary sources
Wikipedia articles should rely mainly on published reliable secondary sources and, to a lesser extent, on tertiary sources. All interpretive claims, analyses, or synthetic claims about primary sources must be referenced to a secondary source, rather than original analysis of the primary-source material by Wikipedia editors.
For the purposes of Wikipedia policies and guidelines, primary, secondary and tertiary sources are defined as follows:[2][3]
- Tertiary sources are publications such as encyclopedias or other compendia that mainly summarize secondary sources. For example, Wikipedia itself is a tertiary source. Many introductory undergraduate-level textbooks may also be considered tertiary sources, to the extent that they sum up multiple secondary sources.
- Our policy: Wikipedia articles should rely mainly on published reliable secondary sources and, to a lesser extent, on tertiary sources. All interpretive claims, analyses, or synthetic claims about primary sources must be referenced to a secondary source, rather than original analysis of the primary-source material by Wikipedia editors. Tertiary sources can be helpful in providing broad summaries of topics that involve many primary and secondary sources. Some tertiary sources may be more reliable than others, and within any given tertiary source, some articles may be more reliable than others. WP:Verifiability#Reliable sources describes the criteria for assessing the reliability of sources.
- Secondary sources are at least one step removed from an event. They rely for their facts and opinions on primary sources, often to make analytic, synthetic, interpretive, explanatory, or evaluative claims.[4][5][6]
- Our policy: Wikipedia articles usually rely on material from secondary sources. Articles may include analytic, synthetic, interpretive, explanatory, or evaluative claims so long as they have been published by a reliable source.
 | This section is the subject of a current discussion. Please feel free to join in. This doesn't mean that you may not be bold in editing this section, but that it would be a good idea to check the discussion first. |
- Primary sources are sources very close to an event. For example, an account of a traffic accident written by a witness is a primary source of information about the accident. Other examples include archeological artifacts; photographs; historical documents such as diaries, census results, video or transcripts of surveillance, public hearings, trials, or interviews; tabulated results of surveys or questionnaires; written or recorded notes of laboratory and field experiments or observations; and artistic and fictional works such as poems, scripts, screenplays, novels, motion pictures, videos, and television programs. The key point about a primary source is that it offers an insider's guide to an event, a period of history, a work of art, a political decision, and so on.[7]
- Our policy: Primary sources that have been published by a reliable source (for example, by a university press or mainstream newspaper) may be used in Wikipedia, but only with care, because it is easy to misuse them. Any interpretation of primary source material requires a reliable secondary source for that interpretation. Without a secondary source, a primary source may be used only to make descriptive claims, the accuracy of which is easily verifiable by any reasonable, educated person without specialist knowledge. For example, an article about a novel may cite passages from the novel to describe the plot, but any interpretation of those passages needs a secondary source.
Unsourced material obtained from a Wikipedian's personal experience, such as an unpublished eyewitness account, should not be added to articles. It would violate both this policy and Verifiability, and would cause Wikipedia to become a primary source for that material.
Appropriate sourcing can be a complicated issue, and these are general rules. Deciding whether primary, secondary or tertiary sources are more suitable on any given occasion is a matter of common sense and good editorial judgment, and should be discussed on article talk pages.
Related policies
Verifiability
The threshold for inclusion in Wikipedia is verifiability, not truth. This policy and the verifiability policy reinforce each other by requiring that only assertions, theories, opinions, and arguments that have already been published in a reliable source may be used in Wikipedia.
Neutral point of view
The prohibition against original research limits the extent to which editors may present their own points of view in articles. By reinforcing the importance of including verifiable research produced by others, this policy promotes the inclusion of multiple points of view. Consequently, this policy reinforces our neutrality policy. In many cases, there are multiple established views of any given topic. In such cases, no single position, no matter how well researched, is authoritative. It is not the responsibility of any one editor to research all points of view. But when incorporating research into an article, it is important that editors provide context for this point of view, by indicating how prevalent the position is, and whether it is held by a majority or minority.
The inclusion of a view that is held only by a tiny minority may constitute original research. Jimbo Wales has said of this:
- If your viewpoint is in the majority, then it should be easy to substantiate it with reference to commonly accepted reference texts;
- If your viewpoint is held by a significant minority, then it should be easy to name prominent adherents;
- If your viewpoint is held by an extremely small minority, then — whether it's true or not, whether you can prove it or not — it doesn't belong in Wikipedia, except perhaps in some ancillary article. Wikipedia is not the place for original research.[8]
See also
- {{Original research}} — template used to warn of original research
- {{Synthesis}} — template used to warn of unpublished synthesis
- Wikipedia:No original research/history — origins of this policy
- How to cite sources
- Wikipedia:Template messages/Disputes
- Wikipedia:These are not original research
Notes
- ^ Mr. Wales disapproves of synthesized historical theories and states: "Some who completely understand why Wikipedia ought not create novel theories of physics by citing the results of experiments and so on and synthesizing them into something new, may fail to see how the same thing applies to history." (Wales, Jimmy. "Original research", December 6, 2004)
- ^ Various professional fields treat the distinction between primary and secondary sources in differing fashions. Some fields and references also further distinguish between secondary and tertiary sources. Primary, secondary and tertiary sources are broadly defined here for the purposes of Wikipedia.
- ^ This University of Maryland library page provides typical examples of primary, secondary and tertiary sources.
- ^ University of California, Berkeley library defines "secondary source" as "a work that interprets or analyzes an historical event or phenomenon. It is generally at least one step removed from the event".
- ^ Borough of Manhattan Community College, A. Philip Randolph Memorial Library, "Research Help:Primary vs. Secondary Sources" notes that a secondary source "analyzes and interprets primary sources", is a "second-hand account of an historical event" or "interprets creative work". It also states that a secondary source "analyzes and interprets research results" or "analyzes and interprets scientific discoveries".
- ^ The National History Day website states simply that: "Secondary sources are works of synthesis and interpretation based upon primary sources and the work of other authors."
- ^ Definitions of primary sources:
- The University of Nevada, Reno Libraries define primary sources as providing "an inside view of a particular event". They offer as examples: original documents, such as autobiographies, diaries, e-mail, interviews, letters, minutes, news film footage, official records, photographs, raw research data, and speeches; creative works, such as art, drama, films, music, novels, poetry; and relics or artifacts, such as buildings, clothing, DNA, furniture, jewelry, pottery.
- The University of California, Berkeley library offers this definition: "Primary sources enable the researcher to get as close as possible to what actually happened during an historical event or time period. Primary sources were either created during the time period being studied, or were created at a later date by a participant in the events being studied (as in the case of memoirs) and they reflect the individual viewpoint of a participant or observer."
- ^ Wales, Jimmy. "WikiEN-l roy_q_royce@hotmail.com: --A Request RE a WIKIArticle--", September 29, 2003.
Further reading
- Wales, Jimmy. Crackpot articles, mailing list, July 12, 2003.
- Wales, Jimmy. "NPOV and 'new physics'", mailing list, September 26, 2003.
- Wales, Jimmy. "NPOV and 'new physics'", mailing list, September 26, 2003 (followup to above)
- Wales, Jimmy. "Original research", mailing list, December 3, 2004
- Wales, Jimmy. "Original research", mailing list, December 6, 2004