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Anyone who has never made a mistake has never tried anything new.
Albert Einstein
Writing Up Methodology
For this assignment you will write the Materials and
Methods section of a scientific research paper. This section should be
the easiest of all to write, if you have good notebook skills. For many
people, however, the difficult part is to address its true purpose. What
this section does is document the methods that you employed in order
to conduct your experiments. What it does not do
is describe each of your specific experiments in detail. It is a write-up
of the methodology, not a write-up of the study. A well-written Materials & Methods
section allows a competent scientist to use your methods to duplicate
your results or apply them to a different study with different objectives.
It also allows a scientist to judge the scientific merit of your methodology.
Use specific, informative language
to organize the material in a logical way. Keep in mind that chronological
organization is not always best for scientific writing. Read
pages 78-83 in Writing Papers in the Biological Sciences about conventions
for writing this section and look over the suggestions listed below.
It might also help to examine the more extensive material on writing
research papers at http://www.ruf.rice.edu/~bioslabs/tools/report/reportform.html.
Specific suggestions:
- Include specific information about specialized materials
- You
can usually combine the "materials" with the "methods" rather
than have a separate subheading for materials
- Include sources of specialized chemicals, supplies, equipment, and
biological materials only if they are not commonly found in a laboratory
- Include complete taxonomic information about any organisms
that are used (genus, species, and specific strain, if applicable)
- Some information that should be recorded in your lab notebook will
be of little use to another researcher and should be omitted from the
materials and methods
- Generally omit names/models of equipment (e.g., Eppendorf microcentrifuge);
just give the experimental details, such as acceleration (x g), time,
and temperature for a centrifugation
- Generally omit describing the use of commonly stocked inorganic compounds,
glassware, pipettors, stir plates, and so on; their use will be implicit
in a well written set of procedures
- Write a complete and concise description of methods that you employed,
presented in a logical order,
which is not necessarily the actual order in which you performed the
procedures
- Be careful that essential information is included, but be succinct when
describing the protocols
- Strive for the minimum of information that would allow another competent
scientist to duplicate your results
- Group related methodologies as a section; when appropriate, use subheadings and
coordinate them with the Results section
- When a method is used that has been well described in another article, reference
the specific article describing the method but outline the
basic premise
- Only include information useful for repetition of your experiments,
no unnecessary details
- Do not explain the rationale behind your choices; no explanations
of any kind should be necessary
- Limit your descriptions to information that is essential for repetition
of methods
- Choose verb tense and voice carefully; past tense is almost always
necessary
- Avoid 1st person—put the emphasis on the
research NOT the researcher!
- In this section it is usually necessary to use passive voice;
methods do not conduct themselves
- It is generally considered inappropriate to write methods in the
form of instructions; this style does not reflect the purpose of a
materials and methods section
- Active voice (but not necessarily first person) is appropriate for
other sections of a research paper
When you complete your first draft, ask yourself this question:
Could someone else follow my words in this section and perform the
same experiment with the same results?
Style and organization
- Type text in a font size of 12 points; use either
Times, Times New Roman, or Cambria
- Print on 8.5 x 11 paper
- Use double spacing throughout
- Use one-inch margins
- ONE page limit
- Include your name, lab section, and date at the top
of the page
- Use "Materials and Methods" for the major heading
for the section; use SUBHEADINGS to break up the text
- Give abbreviations in ( ) immediately after the complete
citation of the term within the text (abbreviations
of some important biochemical compounds, e.g., ATP,
NADH, DNA, and amino acids in proteins, need not be
defined)
Evaluation
We will grade your Materials and Methods section according
to the following criteria:
- Organization
- Clarity, conciseness, and professional style
- Inclusion of appropriate procedures
- Accuracy of the documentation
- Level of detail for each procedure (includes omission of unnecessary
details)
Due dates
See information in OWL-Space.
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We would like to thank New England Biolabs for their generous support of our laboratory program

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Created by David R. Caprette (caprette@rice.edu),
Rice University 22
Jul 08, last updated 24 August 2014
Authored by Beth Beason, Ph.D., David Caprette, Ph.D., and Elizabeth Eich, Ph.D.,
Rice University |