- connects the research work to the existing knowledge base
- relates the study to the larger ongoing dialogues in the literature
- provides a framework for establishing the importance of the study
- supports the comparison of the results with previous findings
The literature search is usually done in at the beginning of the studies, but the literature search might be needed again when writing the articles related to the doctoral studies. Creswell (2009) recommends that the literature search should be started by identifying the key wordskeywords. It is also good to note that a proper literature search will take time. It is not completed in a day or two or even in a couple of weeks.
Please use the following questions to guide the beginning of the search:
- why are you doing the search?
- what are you exactly looking for, e.g. what are the key wordskeywords?
- what sources should be used?
- what is the time span of the literature included in the search?
- how can you limit the search?
- how to identify and select the papers that are most relevant?
- when I have collected "enough" data?
Note: A common argument from a student is that there is only few or even no previous literature related to the topic of the research paper or doctoral research topic. Advise: Never give this explanation! Discuss with the supervisor about the key terms and the search strategy.
Use a variety of sources
One of the most common mistakes of the literature search is that only few sources are used, which makes the results limited. It is extremely important to use a variety of different sources. Electronic databases accessible via the University library are a good way of locating research literature , because you can access both recent literature and articles published several years ago. However, search functions in databases might not be very precise. In some cases, better results are achieved, for instance, by using the search functions in the websites of the scientific journals.
- UEF-Primo, https://primo.uef.f, UEF-Primo is the search service of library’s printed and electronic resource resources (databases, online journals, electronic books and dictionaries etc.). In UEF-Finna is is possible also to renew loans, place holds and requests and save your favorites.
- ACM and IEEE Electronic Databases these databases are very relevant for computer science students. Links:ACM database, IEEE database.
- Google Scholar, http://scholar.google.com/; Google scholar provides more academically relevant search results than regular Google search. However, some of the articles found by the Google scholar might not be available for free access. Also do not rely just on the the Google Scholar, but use other sources.
- List of most frequently used databases in UEF; http://www.uef.fi/web/kirjasto/tiedonhaku-ja-tiedonhaun-opetus/pikalinkit
- Science Direct database. Address: http://www.sciencedirect.com/
- List of Journals in Educational Technology and Computer Science Education - These journals are important sources of information for all IMPDET students, for instance, when conducting the literature review or just searching for recent research conducted in educational technology and Computer Science Education.
- Research articles published in the edTech research group. Sometimes you do not need to go far to find the most relevant articles. Make sure that you are aware of the previous research done in your research group. Also it is worthwhile at least to browse through the previous dissertations from the IMPDET-LE study programme; http://cs.joensuu.fi/~context/index.php?page=alumni
- Select the journals
- Decide the time period of the search (Five yearyears, 10 years, longer?)
- Systematically go through every single number of the selected journals published within the time period.
- Based on the title, abstract, and discussion part of the papers, pick articles for later inspection
- When you do the literature review, you need to go through the articles in detaileddetail.
The latest research and development work in Computer Science can be found in conference articles. Some of the conference series might not be available in the electronic database. In the department library, you can find some conference proceedings (CD-ROMs and books). In some cases, it is worthwhile just to quickly browse through the index of the conference proceedings to find out research articles relevant for your information search task. For instance, via the IEEE/IEE Electronic Library Online you can search directly from the conference proceedings of certain conference series.
Wiki pages can also be helpful in the early stages of the search process. If a Wiki page is created properly it should include references to the origin of the information presented in the Wiki. By following the references you might find more valid sources. It is not encouraged to refer directly to Wiki in the thesis (except when the Wiki is extremely well written and including a lot of useful information).
After the key terms and sources have been decided, the next step is to start thinking about searching strategies. Start the search with general terms and then refine continuously the focus of your search. Avoid random searchers and select carefully which keywords and terms you use in the search. Write down how you have used the search terms , so that the supervisor can give you instructions on how to modify the search. Creswell (2009) recommends that the literature search should first locate about 50 reports of research in articles or books related to research on the topic of the doctoral studies.
If you are stuck, think about synonyms or change wording. It is important to use terms that are currently being used by the researchers, and not select terms that are outdated. For instance, in educational technology, the term technology-enhanced learning has been used recently to refer to the use of ICT in education or as a synonym to term educational technology.
Often it is also important to find the most important and relevant people in a field or topic. Try to find out those persons who have influenced most to the development of the field (e.g. the name of the person appears in many articles). It is not enough to stop with just a few names, but try to expand to a larger amount. It is also beneficial to identify the most relevant research centers, institutions, and research groups working with the topic relevant to your information need.
Sometimes it is important to identify articles related to your topi topic that are mostly most cited. Here you can find quick instructions on how to do a citation search. http://www.open.ac.uk/library/help-and-support/how-do-i-do-a-citation-search
As noted earlier a common argument from PhD students is they can't find enough previous research articles related. Thus, it is important to learn how to expand the search results during the literature search process. A very good search strategy is to use the initial search results to find more articles related to the topic. You can expand the search results by searching the references of the articles you retrieved, determine which references are most useful, find the new articles, check their references and keep repeating the process until there are no new relevant articles to be found (Randolph, 2008).
You might also considering consider searching the other work done by the author(s) of the retrieved research papers. A good hint is also to look for papers published by the research group of the author. Usually the most important persons (e.g. champions) in any field are effective writers and they have most probably published several articles related to the topic of the search.