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How to read a research paper

时间:2010-04-26 09:07:58  来源:  作者:

How to read a research paper.
Later in the semester, we will talk about how to write a research paper. To begin the course, however, we
consider how to read a research paper. This discussion presupposes that you have a good reason to carefully
read a research paper – for example, the fact that I assign a paper is (probably) a good reason for you to read
it. You may also need to carefully read a paper if you are asked to review it, or if it is relevant to your own
research. We might also later discuss how to skim a paper, so that you can decide whether a paper is worth a
careful reading.
When you read a research paper, your goal is to understand the scientific contributions the authors are
making. This is not an easy task.1 It may require going over the paper several times. Expect to spend several
hours to read a paper.
Here are some initial guidelines for how to read a paper:
􀀀 Read critically: Reading a research paper must be a critical process. You should not assume that the
authors are always correct. Instead, be suspicious.
Critical reading involves asking appropriate questions. If the authors attempt to solve a problem, are they
solving the right problem? Are there simple solutions the authors do not seem to have considered? What
are the limitations of the solution (including limitations the authors might not have noticed or clearly
admitted)?
Are the assumptions the authors make reasonable? Is the logic of the paper clear and justifiable, given
the assumptions, or is there a flaw in the reasoning?
If the authors present data, did they gather the right data to substantiate their argument, and did they
appear to gather it in the correct manner? Did they interpret the data in a reasonable manner? Would
other data be more compelling?
􀀀 Read creatively: Reading a paper critically is easy, in that it is always easier to tear something down than
to build it up. Reading creatively involves harder, more positive thinking.
What are the good ideas in this paper? Do these ideas have other applications or extensions that the
authors might not have thought of? Can they be generalized further? Are there possible improvements
that might make important practical differences? If you were going to start doing research from this
paper, what would be the next thing you would do?
􀀀 Make notes as you read the paper:
Many people cover the margins of their copies of papers with notes. Use whatever style you prefer. If
you have questions or criticisms, write them down so you do not forget them. Underline key points the
authors make. Mark the data that is most important or that appears questionable. Such efforts help the
first time you read a paper and pay big dividends when you have to re-read a paper after several months.
1It would be easier if more research papers were well written... but again, we will discuss writing later on.
􀀀 After the first read-through, try to summarize the paper in one or two sentences.
Almost all good research papers try to provide an answer a specific question. (Sometimes the question is
a natural one that people specifically set out to answer; sometimes a good idea just ends up answering a
worthwhile question.) If you can succinctly describe a paper, you have probably recognized the question
the authors started with with and the answer they provide. Once you have focused on the main idea, you
can go back and try to outline the paper to gain insight into more specific details. Indeed, if summarizing
the paper in one or two sentences is easy, go back and try to deepen your outline by summarizing the
three or four most important subpoints of the main idea.
􀀀 If possible, compare the paper to other works.
Summarizing the paper is one way to try to determine the scientific contribution of a paper. But to really
guage the scientific merit, you must compare the paper to other works in the area. Are the ideas really
novel, or have they appeared before? (Of course we do not expect you to be experts and know the areas
ahead of time in this class!)
It is worth mentioning that scientific contributions can take on many forms. Some papers offer new ideas;
others implement ideas, and show how they work; others bring previous ideas together and unite them
under a novel framework. Knowing other work in the area can help you to determine which sort of
contribution a paper is actually making.
For this class, I will often ask you to provide a short, one page review of a paper. Although this may sound
like a simple assignment, I expect that it will take a significant amount of time, especially in the beginning.

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