Writing the parts of scientific reports
18 Writing the methodology chapter
General
The title of this chapter can vary, such as Procedure(s) or Experiments or Materials and Methods, depending on the discipline, the project or subject of the study. The location of this chapter within a paper can vary. In a simple thesis it typically precedes the Results chapter. In a project report there might not be a separate chapter with the title ‘Methodology”, but this might be part of the description of the project tasks or research design.
Purpose of the methodology section
Overall, the purpose of this section is to provide the reader with information on the methods used to answer the research question (s), to achieve the objectives of the projects. Another important aspect is the justification for each method, which means why they were used, and also how. This involves a restatement of the research aim/ objectives and explains to the reader how the chosen research method (s) help answer the research questions. At this stage ethical issues or limitations of the research can also be stated.
In other studies, the primary goal of this section is to convey to the reader the validity of the research which has been undertaken. The reader must be able to replicate the experiment and obtain essentially the same result.
Writing up the methods
In social science readers are often not only interested in the findings but in the methods you used to obtain them such as how you chose your sample, how representative it is, the questions posed in the survey or asked in the interview. The method section then becomes a detailed account of the steps undertaken in your research. Methods sections of projects using a non-experimental approach most likely have the three components of description, explanation and justification of data and method.
Therefore, the methods section fulfills three purposes (Lea, 2014):
- Describe the data and method(s) used
- Explain how the data were collected and how the method (s) were employed in the research
- Justify why the data were collected and why particular methods were chosen.
Overall structure
The overall structure follows the general-to-specific pattern, and also the logical organization of your project.
Introduction | Provide overview of the entire section; restate overall purpose of the investigation; review of research aims. |
Why (not)? | Rationale of choice of research methods including strengths and weaknesses of different methods (here you might refer to other research or methodological literature). Mention other methods you could have used if you had been able to do so. |
What and when? | Overview of methods or overall design of experiment: the order should help the reader to understand how methods are connected, built on each other and to understand the process of your research. |
How? | Description of methods and/or materials (description of experiment, field or laboratory equipment, calculations, simulations, software, procedures, statistical treatment, considerations of sampling and design techniques for surveys and interviews) |
How? | Details on how data are processed, evaluated, how the results are calculated (statistical treatment, other assessment instruments with clear justification of why this method is used) |
Experimental method
If experiments are used as a method, procedures followed and how results were calculated have to be presented. A typical structure:
- Apparatus: briefly describe the equipment, hardware used. Be as precise as possible: full details, including photographs, drawings or sketches should be placed in the appendix.
- Materials: list the materials used- be specific.
- Procedure: present a chronological account of how the experiment was conducted.
Language focus
Use present tense to restate the aim/ purpose of your paper: this paper investigates the effects….
Most parts of this section use past tense + passive:
How it was done (passive voice + by ….. ing): the test was carried out by using a saturated solution of …
Why it was done (passive voice + to + verb): the …. was used to measure…
Use of sub-headings
This section often has subheadings which should, whenever possible, match those to be used in the results section.
Describing sequence
Sequence, or order, is important in describing processes. The table below shows some common expressions.
first | the first step is.. | to begin with | initially |
beforehand/ before this | at the same time | during | after this/ later |
secondly, thirdly, etc. | next/the next step is… | subsequently | in the following stage |
following this | lastly/ finally | the last stage | the last step is to |
You may also want to explain:
how something is done:
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or why something is done:
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