What is the term used to describe sociological research that is intended to solve social problems, such as the research done by Jane Addams?

applied sociology

Explanation:

Applied sociology aims to put in practice and study the effects of the application of solutions to social problems in a real-world setting. Sociology mainly involves studying the patterns of behavior of humans over a span of time. Applied sociology involves applying solutions that are learned from the observations.

Jane Addams was an eminent sociologist who promoted women's rights and mediated the demands of the people during the 1910 Garment Workers' Strike.

Hence the question here is referring to applied sociology.