by Chelsea Lee
Have you heard about how alligators infest the New York City
sewer system? The ones brought north by Florida snowbirds for the summer as
pets, who were then jettisoned after they outgrew the family bathtub? Indeed, your
cousin’s best friend once saw one with her own eyes. Or, at least, that’s what
your cousin told you. But you wonder, is it really true, or is it just an urban legend?
Reliable Sources in
Academic Research Are Usually Primary Sources
Likewise, when it comes to academic research, it’s extremely
important to make sure that the claims you make are backed up by sound evidence,
or else your paper won’t stand up to scrutiny from your professors or
colleagues (just like that alligator story didn’t hold up once you started
looking into it).
As we saw with the alligator story, one of the best ways to
help ensure a source’s reliability is to make sure you’re reading a firsthand
account, or a primary source, from
someone who saw the events for him- or herself (like the best friend), rather
than a secondhand account, or a secondary
source, from someone who only heard about the events but didn’t witness
them personally (like your cousin). Most of the sources you use in
a research paper or thesis should be primary sources, not secondary sources.
How to Spot a Primary
Source in the Wild
Primary sources can come in many different forms. For
example, a journal or magazine article might report the results of an original
experiment, or a book or website might describe a theory or technique the
author has developed or has expertise in. Note, however, that not every
article, book, website, and so forth contains primary research. To determine
whether a document is a primary source, ask, did the authors discover this
finding themselves (primary source), or are they reporting what someone else
found (secondary source)?
You’ll have to evaluate each source on a case-by-case basis,
but some document
types tend to make promising primary
sources:
- journal articles;
- books and book chapters;
- some magazine and newspaper articles;
- reports, such as from government agencies or
institutions;
- dissertations and theses;
- interview and speech transcripts and recordings;
- video and audio recordings;
- personal communications; and
- webpages.
Secondary Sources:
Second Best?
In our alligator story example, the word of the secondary
source, your cousin, ended up not being too trustworthy, and that’s why we
shied away from citing it. But that’s not always the case with secondary
sources—in fact, many secondary sources can be not only reliable but also extremely
helpful during the research process. For example, a textbook or an encyclopedia
(including Wikipedia) can help you
get acquainted with a research area by summarizing others’ research. Or you
might read a summary of one scientist’s interesting study in someone else’s
journal article.
In these cases, however, the chief advantage of the
secondary source is not the quotes that you find but that it points you to the
primary source through a citation. It’s important to read (and then cite) the
primary source if you can, because that will enable you to verify the accuracy
and completeness of the information.
It would not look good for you to cite a
secondary source (like your cousin with the alligator tale) only for someone
else (like your professor—or animal control) to inform you later that the truth was in fact something quite the
opposite. Even when secondary sources are highly accurate, being thorough and
reading the primary sources helps demonstrate your merit as a scientist and
researcher and helps others find that helpful information.
Citations to secondary sources are permissible under certain
circumstances. For example, if you are discussing Wikipedia in your paper, you should cite it (here are some more of our thoughts on citing Wikipedia). Likewise, some primary
sources are unobtainable (such as if they are out of print or impossible to
find) or written in a language you don’t understand, so the secondary source is
what you should cite. Or the secondary source might offer an analysis of the
primary source that you want to refer the reader to. See our post on how
and when to cite secondary sources (a.k.a. a source you found in another
source) and refer to Publication Manual
section 6.17 (p. 178) for directions and examples of citations to secondary
sources.
We hope this discussion of primary and secondary sources has
helped you understand what types of sources are most effective and helpful to
use in a research paper. Also we hope that you will contact us if you ever do
find that alligator, because the family bathtub just isn’t the same without him.
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