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A secondary source summarizes one or more primary or secondary sources to provide an overview of current understanding of the topic, to make recommendations, or to combine results of several studies. Examples include literature reviews or systematic reviews found in medical journals, specialist academic or professional books, and medical ...
Examples in which a source can be both primary and secondary include an obituary [23] or a survey of several volumes of a journal counting the frequency of articles on a certain topic. [23] Whether a source is regarded as primary or secondary in a given context may change, depending upon the present state of knowledge within the field. [24]
A literature review can be a type of a review article. In this sense, it is a scholarly paper that presents the current knowledge including substantive findings as well as theoretical and methodological contributions to a particular topic. Literature reviews are secondary sources and do not report new
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".
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 ...
In general, secondary sources in a scientific context may be referred to as "secondary literature", [16] and can be self-described as review articles or meta-analysis. Primary source materials are typically defined as "original research papers written by the scientists who actually conducted the study."
Secondary sources are written accounts of history based upon the evidence from primary sources. These are sources which, usually, are accounts, works, or research that analyze, assimilate, evaluate, interpret, and/or synthesize primary sources. These are not as authoritative and are supplemental documents concerning the subject under consideration.
Many sources contain a combination of primary/secondary or secondary/tertiary material, sometimes all three. A source that is secondary in one context may be primary in another (e.g. a history book is a secondary source for the facts it reports, but a primary source for what the author wrote about an event).