This article review offers an overall description of the article "Research approaches in Applied lingusitics", written by Patricia Duff back in 2002. In the aforementioned article, the author discusses about the two main approaches to research in the field of applied linguistics which are the qualitative and quantitative approach. And provides, at the same time, a deeper analysis on the useful ways in which these two can be used, and how, by mixing them together, a mixed methods approach might emerge in order to make the investigation process more meaningful and better elaborated.