Overall, it can be stated that  “A more precise definition of interdisciplinary research is needed so that funding agencies and researchers themselves can identify the competencies and resources necessary for successful interdisciplinary contributions to science“  \citep{Aboelela_2007}. Hence, the goal of the paper is to provide a more fine-grained understanding on interdisciplinarity and its research impact. The research question is as follows: How does the research impact vary depending on the kind, degree and time-frame of IDR?

3. Methodology