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Secondary data refers to data that is collected by someone other than the primary user. [1] Common sources of secondary data for social science include censuses , information collected by government departments, organizational records and data that was originally collected for other research purposes. [ 2 ]
Secondary sources may draw on primary sources and other secondary sources to create a general overview; or to make analytic or synthetic claims. [3] [4] Tertiary sources are publications such as encyclopedias or other compendia that sum up secondary and primary sources. For example, Wikipedia itself is a tertiary source.
Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...
A primary source can have all of these qualities, and a secondary source may have none of them. Deciding whether primary, secondary or tertiary sources are appropriate on any given occasion is a matter of good editorial judgment and common sense, not merely mindless, knee-jerk reactions to classification of a source as "primary" or "secondary".
Despite the fundamental importance of using primary and secondary sources, the difference between these is sometimes unclear; the information required to assess whether a source, or part of a source, is primary or secondary is often contained in rather long, detailed, general guidelines which might also be covering Art, History, Law, etc.
Secondary research is contrasted with primary research in that primary research involves the generation of data, whereas secondary research uses primary research sources as a source of data for analysis. [1] A notable marker of primary research is the inclusion of a "methods" section, where the authors describe how the data was generated.
Secondary source material is based on primary and other secondary source material, and may include synthesis and novel conclusions. A tertiary source is one that is based on a broad base of material, usually secondary, without introducing new synthesis or conclusions. Many sources contain a combination of primary/secondary or secondary/tertiary ...
For the purposes of Wikipedia policies and guidelines, primary, secondary and tertiary sources are defined as follows: [1] [2] Primary sources are very close to an event, often accounts written by people who are directly involved, offering an insider's view of an event, a period of history, a work of art, a political decision, and so on.