In the introduction, you are attempting to inform the reader about the rationale behind the work, and to justify why your work is essential in the field.
The introduction does not have a strict word limit, unlike the abstract, but it should be as concise as possible.
After all, a weakness in your paper might later inspire another research question, so be very clear about your assumptions early on.
The text in this article is licensed under the Creative Commons-License Attribution 4.0 International (CC BY 4.0).
As for the topic, begin with a broader context, defining general issues of your topic.
After that, start zooming in on particular features of such issues, explaining to your readers what exactly your paper is about. Any research paper written for publication requires you to provide a list of keywords which reflects considered issues. We suggest mentioning a few keywords in your first sentences.
This gives your paper a context and allows readers to see how it fits in with previous research in the field.
This section, comprising the first paragraphs of your introduction, can be based around a historical narrative, chronologically outlining the very first research in the field to the current day.
It works on the principle of introducing the topic of the paper and setting it in a broader context, gradually narrowing the topic down to a research problem, thesis and hypothesis.
A good introduction explains how you mean to solve the research problem, and creates ‘leads’ to make the reader want to delve further into your work.