Research methods in psychology is about how different types of scientific research methods can be utilised in psychological research.
Psychology is a science. Psychological research uses the scientific method to systematically investigate and understand human experience and behaviour (Willig, 2019). The scientific method is a systematic refinement of everyday thinking (Einstein, 1936).
A useful distinction is made between research which is:
The approaches represent two sides of the same coin. Or, as Karl Marx wrote:
“ | Merely quantitative differences, beyond a certain point, pass into qualitative changes. - Karl Marx “Capital: An abridged edition”, 1999, p. 322, OUP Oxford |
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Though predating the term "qualitative research", early pioneers such as Freud, Jung, and Piaget utilised such methods in their early work (e.g., case studies) and, by doing so, provided the foundation for modern psychology (del Rio Carral & Tseliou, 2019).
Since the first experimental psychology laboratory was established in 1879 by Wundt, psychological research become highly quantitative during the 20th century. During the 21st century, the methods and foci of psychological research have expanded and diversified (Nelson, 2015).
Each research method has strengths and weaknesses, so the selection of which method(s) to use should depend on the aims and nature of the research question.
Many different research methods are used in psychological research, including:
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Einstein, A. (1936). Physics and reality. https://d1wqtxts1xzle7.cloudfront.net/34651272/Physics_and_Reality_by_Albert_Einstein-libre.pdf
Nelson, K. (2015). Quantitative and qualitative research in psychological science. Biological Theory, 10(3), 263–272. https://doi.org/10.1007/s13752-015-0216-0
Willig, C. (2019). What can qualitative psychology contribute to psychological knowledge? Psychological Methods, 24(6), 796–804. https://doi.org/10.1037/met0000218